Diagnosis Item 4: Diagnose shorts between CAN_H and L lines (CAN-C)
| caution |
- When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.
- When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID.)
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TROUBLE JUDGEMENT
When all of the following conditions are met, the M.U.T.-III determines that a short circuit is present between CAN_L and CAN_H lines.
- The M.U.T.-III cannot receive the periodic transmission data from any ECUs.
- The voltage between CAN-C (CAN_L and CAN_H lines) is 1.0 V or more, 4.0 V or less.
- The resistance at CAN-C (CAN_L and CAN_H lines) is 2 Ω or less.
TROUBLESHOOTING HINTS
- Malfunction of the wiring harness
- Malfunction of the connector
- Malfunction of the ETACS-ECU
- Malfunction of the gateway-ECU <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>
- Malfunction of the SRS-ECU
- Malfunction of the column switch assembly (steering wheel sensor) <Vehicles with ASC>
- Malfunction of the electric parking brake ECU <Vehicles with electric parking brake>
- Malfunction of the clearance warning control unit <Vehicles with ultrasonic misacceleration mitigation system/corner sensor system or reversing sensor system>
- Malfunction of the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC>
- Malfunction of the FCM/LDW/AHB-ECU <Vehicles with FCM>
- Malfunction of the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC>
- Malfunction of the EPS-ECU
- Malfunction of the CVT-ECU <CVT> or A/T-ECU <A/T>
- Malfunction of the AS&G-ECU <Vehicles with AS&G system>
- Malfunction of the ACC-ECU <Vehicles with ACC>
- Malfunction of the engine-ECU
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STEP 1. Connector check: C-126 intermediate connector
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| caution |
The strand end of the twist wire should be within 10 cm from the connector.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the defective connector.
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STEP 2. Resistance measurement at C-126 intermediate connector.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used
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(1)Disconnect the connector, and measure at its female-side intermediate connector (at the front wiring harness side).
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between C-126 intermediate connector terminal Nos.15 and 16
OK: 120 ± 20 Ω
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Q.
Is the check result normal?
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<Within 120 ± 20 Ω> Go to Step 19.
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<Not within 120 ± 20 Ω> Go to Step 3.
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STEP 3. Connector check: joint connector (CAN1)
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| caution |
The strand end of the twist wire should be within 10 cm from the connector.
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When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair a defective connector or replace the joint connector.
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STEP 4. Connector check: joint connector (CAN2)
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| note |
Step 4 is only for vehicles with ACC. On vehicles without it, go to Step 5 .
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| caution |
The strand end of the twist wire should be within 10 cm from the connector.
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When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.
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Q.
Is the check result normal?
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Go to Step 5.
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Repair a defective connector or replace the joint connector.
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STEP 5. Resistance measurement at joint connector (CAN1).
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN1) terminal Nos.8 and 17
OK: 120 ± 20 Ω
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Q.
Is the check result normal?
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YES  : <Within 120 ± 20 Ω> Go to Step 9.
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<Not within 120 ± 20 Ω> Go to Step 6.
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STEP 6. Resistance measurement at engine-ECU connector.
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| note |
Step 6 is only for vehicles without ACC. On vehicles with it, go to Step 7.
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| caution |
A digital multimeter should be used.
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(1)Remove the engine-ECU, and measure at the equipment side.
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(2)Resistance between engine-ECU connector terminal Nos.90 and 91 <4B1, 4J1, 6B3>
OK: 120 ± 20 Ω
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(3)Resistance between engine-ECU connector terminal Nos.108 and 109 <4N1>
OK: 120 ± 20 Ω
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN1) and the engine-ECU connector.
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<Not within 120 ± 20 Ω> Check the engine-ECU connector, and repair if necessary. If the engine-ECU connector is in good condition, replace the engine-ECU.
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STEP 7. Resistance measurement at joint connector (CAN2).
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| note |
Step 7, 8, 9 and 10 are only for vehicles with ACC. On vehicles without it, go to Step 11.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN2) terminal Nos.9 and 20
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 9.
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<Less than 1 kΩ> Go to Step 8.
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STEP 8. Resistance measurement at ACC-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the ACC-ECU, and measure at the equipment side.
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(2)Resistance between ACC-ECU connector terminal Nos.2 and 7
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
ls the check result normal?
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<1 kΩ or more> Check intermediate connector, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) and the ACC-ECU connector.
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<Less than 1 kΩ> Check the ACC-ECU connector, and repair if necessary. If the ACC-ECU connector is in good condition, replace the ACC-ECU.
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STEP 9. Resistance measurement at joint connector (CAN2).
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN2) terminal Nos.10 and 21
OK: 120 ± 20 Ω
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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YES : <Within 120 ± 20 Ω> Check intermediate connector, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) and the joint connector (CAN1).
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<Not within 120 ± 20 Ω> Go to Step 10.
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STEP 10. Resistance measurement at engine-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the engine-ECU, and measure at the equipment side.
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(2)Resistance between engine-ECU connector terminal Nos.90 and 91 <4B1, 4J1, 6B3>
OK: 120 ± 20 Ω
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(3)Resistance between engine-ECU connector terminal Nos.108 and 109 <4N1>
OK: 120 ± 20 Ω
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN2) and the engine-ECU connector.
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<Not within 120 ± 20 Ω> Check the engine-ECU connector, and repair if necessary. If the engine-ECU connector is in good condition, replace the engine-ECU.
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STEP 11. Resistance measurement at joint connector (CAN1).
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN1) terminal Nos.4 and 13
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 13.
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<Less than 1 kΩ> Go to Step 12.
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STEP 12. Resistance measurement at CVT-ECU <CVT> connector or A/T-ECU <A/T> connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the CVT-ECU <CVT> or A/T-ECU <A/T>, and measure at the equipment side.
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(2)Resistance between CVT-ECU connector terminal Nos.9 and 10 <CVT>
OK: 1 kΩ or more
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(3)Resistance between A/T-ECU connector terminal Nos.10 and 11 <A/T>
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Check intermediate connector, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN1) and the CVT-ECU <CVT> connector or A/T-ECU <A/T> connector.
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<Less than 1 kΩ> Check the CVT-ECU <CVT> connector or A/T-ECU <A/T> connector, and repair if necessary. If the CVT-ECU <CVT> connector or A/T-ECU <A/T> connector is in good condition, replace the CVT-ECU <CVT> or A/T-ECU <A/T>.
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STEP 13. Resistance measurement at joint connector (CAN1).
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN1) terminal Nos.6 and 15
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 15.
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<Less than 1 kΩ> Go to Step 14.
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STEP 14. Resistance measurement at EPS-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the EPS-ECU, and measure at the equipment side.
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(2)Resistance between EPS-ECU connector terminal Nos.5 and 6
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the EPS-ECU connector.
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<Less than 1 kΩ> Check the EPS-ECU connector, and repair if necessary. If the EPS-ECU connector is in good condition, replace the EPS-ECU.
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STEP 15. Resistance measurement at joint connector (CAN1).
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| note |
Step 15 and 16 are only for vehicles with AS&G system. On vehicles without it, go to Step 17.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Ensure that the negative battery terminal is disconnected.
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(2)Resistance between joint connector (CAN1) terminal Nos.5 and 14
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 17.
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<Less than 1 kΩ> Go to Step 16.
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STEP 16. Resistance measurement at AS&G-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the AS&G-ECU, and measure at the equipment side.
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(2)Resistance between AS&G-ECU connector terminal Nos.1 and 14
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the AS&G-ECU connector.
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<Less than 1 kΩ> Check the AS&G-ECU connector, and repair if necessary. If the AS&G-ECU connector is in good condition, replace the AS&G-ECU.
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STEP 17. Resistance measurement at joint connector (CAN1).
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN1) terminal Nos.7 and 16
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and C-126 intermediate connector.
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<Less than 1 kΩ> Go to Step 18.
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STEP 18. Resistance measurement at ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC> connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC>, and measure at the equipment side.
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(2)Resistance between ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC> connector terminal Nos.11 and 10
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC> connector.
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<Less than 1 kΩ> Check the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC> connector, and repair if necessary. If the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC> connector is in good condition, replace the ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC>.
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STEP 19. Connector check: joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>
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| caution |
The strand end of the twist wire should be within 10 cm from the connector.
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When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.
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Q.
Is the check result normal?
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Go to Step 20.
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Repair a defective connector or replace the joint connector.
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STEP 20. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.11 and 22 <LHD>
OK: 120 ± 20 Ω
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(5)Resistance between joint connector (CAN4) terminal Nos.5 and 14 <RHD>
OK: 120 ± 20 Ω
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Q.
Is the check result normal?
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<Within 120 ± 20 Ω> Go to Step 22.
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NO : <Not within 120 ± 20 Ω> Go to Step 21.
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STEP 21. Resistance measurement at ETACS-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the ETACS-ECU, and measure at the equipment side.
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(2)Resistance at ETACS-ECU connector terminal Nos.18 and 19
OK: 120 ± 20 Ω
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the ETACS-ECU connector.
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<Not within 120 ± 20 Ω> Check the ETACS-ECU connector, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU.
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STEP 22. Resistance measurement at joint connector (CAN3).
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| note |
Step 22 and 23 are only for 4WD. On vehicles without it, go to Step 24.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3), and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.5 and 16 <LHD>
OK: 1 kΩ or more
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(5)Resistance between joint connector (CAN3) terminal Nos.3 and 12 <RHD>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 24.
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<Less than 1 kΩ> Go to Step 23.
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STEP 23. Resistance measurement at 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC> connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC>, and measure at the equipment side.
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(2)Resistance at 4WD-ECU connector terminal Nos.5 and 13 <Vehicles without S-AWC>
OK: 1 kΩ or more
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(3)Resistance at AWC-ECU connector terminal Nos.23 and 24 <Vehicles with S-AWC>
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Check intermediate connector, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) and the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC> connector.
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<Less than 1 kΩ> Check the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC> connector, and repair if necessary. If the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC> connector is in good condition, replace the 4WD-ECU <Vehicles without S-AWC> or AWC-ECU <Vehicles with S-AWC>.
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STEP 24. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.6 and 17 <LHD>
OK: 1 kΩ or more
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(5)Resistance between joint connector (CAN4) terminal Nos.6 and 15 <RHD>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 26.
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<Less than 1 kΩ> Go to Step 25.
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STEP 25. Resistance measurement at column switch connector.
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| note |
Step 25 is only for vehicles with ASC. On vehicles without it, go to Step 26.
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| caution |
A digital multimeter should be used.
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(1)Remove the column switch assembly, and measure at the equipment side.
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(2)Resistance at column switch connector terminal Nos.3 and 4
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the column switch connector.
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<Less than 1 kΩ> Check the column switch connector, and repair if necessary. If the column switch connector is in good condition, replace the column switch assembly (steering wheel sensor).
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STEP 26. Resistance measurement at joint connector (CAN3).
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| note |
Step 26 and 27 are only for vehicles with FCM. On vehicles without it, go to Step 28.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3), and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.7 and 18 <LHD>
OK: 1 kΩ or more
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(5)Resistance between joint connector (CAN3) terminal Nos.5 and 14 <RHD>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 28.
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<Less than 1 kΩ> Go to Step 27.
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STEP 27. Resistance measurement at FCM/LDW/AHB-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the FCM/LDW/AHB-ECU, and measure at the equipment side.
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(2)Resistance at FCM/LDW/AHB-ECU connector terminal Nos.2 and 8
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) and the FCM/LDW/AHB-ECU connector.
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<Less than 1 kΩ> Check the FCM/LDW/AHB-ECU connector, and repair if necessary. If the FCM/LDW/AHB-ECU connector is in good condition, replace the FCM/LDW/AHB-ECU.
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STEP 28. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
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| caution |
A digital multimeter should be used.
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| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
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Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.8 and 19 <LHD>
OK: 1 kΩ or more
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(5)Resistance between joint connector (CAN4) terminal Nos.7 and 16 <RHD>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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<1 kΩ or more> Go to Step 30.
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<Less than 1 kΩ> Go to Step 29.
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STEP 29. Resistance measurement at SRS-ECU connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the SRS-ECU, and measure at the equipment side.
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(2)Resistance at SRS-ECU connector terminal Nos.30 and 29
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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|
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the SRS-ECU connector.
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<Less than 1 kΩ> Check the SRS-ECU connector, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.
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STEP 30. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
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| note |
Step 30 and 31 are only for vehicles with ultrasonic misacceleration mitigation system/corner sensor system or reversing sensor system. On vehicles without it, go to Step 32.
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|
| caution |
A digital multimeter should be used.
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|
| caution |
The test wiring harness should be used.
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(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
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(2)Turn the ignition switch to the LOCK (OFF) position.
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(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
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(4)Resistance between joint connector (CAN3) terminal Nos.3 and 14 <LHD>
OK: 1 kΩ or more
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(5)Resistance between joint connector (CAN4) terminal Nos.2 and 11 <RHD>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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|
<1 kΩ or more> Go to Step 32.
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<Less than 1 kΩ> Go to Step 31.
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STEP 31. Resistance measurement at clearance warning control unit connector.
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| caution |
A digital multimeter should be used.
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(1)Remove the clearance warning control unit, and measure at the equipment side.
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(2)Resistance at clearance warning control unit connector terminal Nos.4 and 3
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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Q.
Is the check result normal?
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|
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the clearance warning control unit connector.
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<Less than 1 kΩ> Check the clearance warning control unit connector, and repair if necessary. If the clearance warning control unit connector is in good condition, replace the clearance warning control unit.
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STEP 32. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
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| note |
Step 32 and 33 are only for vehicles with electric parking brake system. On vehicles without it, go to Step 34.
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|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
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|
|
(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
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|
(2)Turn the ignition switch to the LOCK (OFF) position.
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|
(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
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|
(4)Resistance between joint connector (CAN3) terminal Nos.1 and 12 <LHD>
OK: 1 kΩ or more
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|
(5)Resistance between joint connector (CAN4) terminal Nos.3 and 12 <RHD>
OK: 1 kΩ or more
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|
Q.
Is the check result normal?
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|
|
<1 kΩ or more> Go to Step 34.
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<Less than 1 kΩ> Go to Step 33.
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STEP 33. Resistance measurement at electric parking brake ECU connector.
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| caution |
A digital multimeter should be used.
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|
|
(1)Remove the electric parking brake ECU, and measure at the equipment side.
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|
(2)Resistance at electric parking brake ECU connector terminal Nos.40 and 30
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
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|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the electric parking brake ECU.
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<Less than 1 kΩ> Check the electric parking brake ECU connector, and repair if necessary. If the electric parking brake ECU connector is in good condition, replace the electric parking brake ECU.
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STEP 34. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
|
|
|
| note |
Step 34 and 35 are only for vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system. On vehicles without it, go to Step 36.
|
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
|
|
|
(2)Turn the ignition switch to the LOCK (OFF) position.
|
|
|
(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(4)Resistance between joint connector (CAN3) terminal Nos.2 and 13 <LHD>
OK: 1 kΩ or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal Nos.1 and 10 <RHD>
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more> Go to Step 36.
|
|
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|
|
<Less than 1 kΩ> Go to Step 35.
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|
STEP 35. Resistance measurement at gateway-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the gateway-ECU, and measure at the equipment side.
|
|
|
(2)Resistance at gateway-ECU connector terminal Nos.3 and 2
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the gateway-ECU.
|
|
|
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|
|
<Less than 1 kΩ> Check the gateway-ECU connector, and repair if necessary. If the gateway-ECU connector is in good condition, replace the gateway-ECU.
|
|
|
|
|
|
STEP 36. Resistance measurement at joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect the joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD>, and measure at the wiring harness side.
|
|
|
(2)Turn the ignition switch to the LOCK (OFF) position.
|
|
|
(3)
| caution |
When measuring the resistance, disconnect the negative battery terminal.
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(4)Resistance between joint connector (CAN3) terminal Nos.9 and 20 <LHD>
OK: 1 kΩ or more
|
|
|
(5)Resistance between joint connector (CAN4) terminal Nos.8 and 17 <RHD>
OK: 1 kΩ or more
| caution |
Strictly observe the specified wiring harness repair procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) <LHD> or joint connector (CAN4) <RHD> and the C-126 intermediate connector.
|
|
|
|
|
|
<Less than 1 kΩ> Check the diagnosis connector, and repair if necessary. If the diagnosis connector is in good condition, repair the wiring harness between joint connector (CAN3) and the diagnosis connector.
|
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