Diagnostic Item 5: Diagnose the CAN bus lines for short to earth <RH drive vehicles except for Hong Kong and Singapore>


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.


TROUBLE JUDGMENT


The CAN bus line has been shorted to earth if the voltage between the CAN bus line (CAN_L or CAN_H) and body earth is less than 1.0 V. In this condition, an abnormal voltage may be measured at CAN_L and CAN_H lines.

COMMENTS ON TROUBLE SYMPTOM


The wiring harness wire or connectors may have loose, corroded, or damage terminals, or terminals pushed back in the connector, or a ECU may be defective.

POSSIBLE CAUSES



DIAGNOSTIC PROCEDURE

STEP 1. Connector check: C-112 engine-A/T-ECU connector, C-02 combination meter connector and C-126 diagnosis connector


caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Are the check result normal?

Go to Step 2.

Repair the defective connector.

STEP 2. Resistance measurement at the C-126 diagnosis connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the engine-A/T-ECU connector and the combination meter connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-126 diagnosis connector terminal No.14 and body earth
OK: 1 kΩ or more

(4)Resistance between C-126 diagnosis connector terminal No.6 and body earth
OK: 1 kΩ or more

Q. Are the check result normal?

YES <all of the measurement results show 1 kΩ or more> : Follow diagnostic item 15 "Diagnose CAN bus lines thoroughly." Refer to .

NO <The resistance between terminal No.14 and body earth is less than 1 kΩ> : Go to Step 3.

NO <The resistance between terminal No.6 and body earth is less than 1 kΩ> : Go to Step 24.

STEP 3. Connector check: C-125 intermediate connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 4.

Repair the defective connector.

STEP 4. Resistance measurement at the C-125 intermediate connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at its male-side intermediate connector (at the front wiring harness side).
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-125 intermediate connector terminal No.27 and body earth
OK: 1 kΩ or more

Q. Is the check result normal?

<1 kΩ or more> Go to Step 5.

<less than 1 kΩ> Go to Step 16.

STEP 5. Connector check: C-09 joint connector (CAN2)

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.

Q. Is the check result normal?

Go to Step 6.

Repair a defective connector or replace the joint connector.

STEP 6. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.17 and body earth
OK: 1 kΩ or more

(4)Resistance between C-09 joint connector (CAN2) terminal No.19 and body earth
OK: 1 kΩ or more

(5)Resistance between C-09 joint connector (CAN2) terminal No.16 and body earth
OK: 1 kΩ or more

(6)Resistance between C-09 joint connector (CAN2) terminal No.15 and body earth
OK: 1 kΩ or more

(7)Resistance between C-09 joint connector (CAN2) terminal No.18 and body earth
OK: 1 kΩ or more

Q. Are the check result normal?

YES <all of the measurement results show 1 kΩ or more> : Go to Step 15.

NO <The resistance between terminal No.17 and body earth is less than 1 kΩ> : Go to Step 7.

NO <The resistance between terminal No.19 and body earth is less than 1 kΩ> : Go to Step 8.

NO <The resistance between terminal No.16 and body earth is less than 1 kΩ> : Go to Step 10.

NO <The resistance between terminal No.15 and body earth is less than 1 kΩ> : Go to Step 12.

NO <The resistance between terminal No.18 and body earth is less than 1 kΩ> : Go to Step 14.

STEP 7. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the combination meter connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.17 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the combination meter connector.

STEP 8. Connector check: C-106 A/C-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 9.

Repair the defective connector.

STEP 9. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the A/C-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.19 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> Follow diagnostic item 15 "Diagnose CAN bus lines thoroughly." Refer to .

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the A/C-ECU connector.

STEP 10. Connector check: C-221 ETACS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 11.

Repair the defective connector.

STEP 11. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the ETACS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.16 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the ETACS-ECU connector.

STEP 12. Connector check: C-119 SRS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 13.

Repair the defective connector.

STEP 13. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the SRS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.15 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the SRS-ECU connector.

STEP 14. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.18 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the diagnosis connector.

STEP 15. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.22 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the intermediate connector.

STEP 16. Connector check: A-07 joint connector (CAN1)
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .
When checking the joint connector, ensure that its wiring harness side is not damaged.

Q. Is the check result normal?

Go to Step 17.

Repair a defective connector or replace the joint connector (front wiring harness assembly).

STEP 17. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.3 and body earth
OK: 1 kΩ or more

(4)Resistance between A-07 joint connector (CAN1) terminal No.2 and body earth
OK: 1 kΩ or more

Q. Are the check result normal?

YES <all of the measurement results show 1 kΩ or more> : Go to Step 23.

NO <The resistance between terminal No.3 and body earth is less than 1 kΩ> : Go to Step 18.

NO <The resistance between terminal No.2 and body earth is less than 1 kΩ> : Go to Step 21.

STEP 18. Connector check: A-16 intermediate connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 19.

Repair the defective connector.

STEP 19. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.3 and body earth
OK: 1 kΩ or more

Q. Is the check result normal?

<1 kΩ or more> Go to Step 20.

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.

STEP 20. Resistance measurement at the A-16 intermediate connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the engine-A/T-ECU connector and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-16 intermediate connector terminal No.12 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 Ω> Repair the wiring harness between the intermediate connector and the engine-A/T-ECU connector.

STEP 21. Connector check: A-03 ABS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 22.

Repair the defective connector.

STEP 22. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the ABS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.2 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the ABS-ECU connector.

STEP 23. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.1 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.

STEP 24. Connector check: C-125 intermediate connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 25.

Repair the defective connector.

STEP 25. Resistance measurement at the C-125 intermediate connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at its male-side intermediate connector (at the front wiring harness side).
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-125 intermediate connector terminal No.26 and body earth
OK: 1 kΩ or more

Q. Is the check result normal?

<1 kΩ or more> Go to Step 26.

<less than 1 kΩ> Go to Step 37.

STEP 26. Connector check: C-09 joint connector (CAN2)

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.

Q. Is the check result normal?

Go to Step 27.

Repair a defective connector or replace the joint connector.

STEP 27. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.6 and body earth
OK: 1 kΩ or more

(4)Resistance between C-09 joint connector (CAN2) terminal No.8 and body earth
OK: 1 kΩ or more

(5)Resistance between C-09 joint connector (CAN2) terminal No.5 and body earth
OK: 1 kΩ or more

(6)Resistance between C-09 joint connector (CAN2) terminal No.4 and body earth
OK: 1 kΩ or more

(7)Resistance between C-09 joint connector (CAN2) terminal No.7 and body earth
OK: 1 kΩ or more

Q. Are the check result normal?

YES <all of the measurement results show 1 kΩ or more> : Go to Step 36.

NO <The resistance between terminal No.6 and body earth is less than 1 kΩ> : Go to Step 28.

NO <The resistance between terminal No.8 and body earth is less than 1 kΩ> : Go to Step 29.

NO <The resistance between terminal No.5 and body earth is less than 1 kΩ> : Go to Step 31.

NO <The resistance between terminal No.4 and body earth is less than 1 kΩ> : Go to Step 33.

NO <The resistance between terminal No.7 and body earth is less than 1 kΩ> : Go to Step 35.

STEP 28. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the combination meter connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.6 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the combination meter connector.

STEP 29. Connector check: C-106 A/C-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 30.

Repair the defective connector.

STEP 30. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the A/C-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.8 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the A/C-ECU connector.

STEP 31. Connector check: C-221 ETACS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 32.

Repair the defective connector.

STEP 32. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the ETACS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.5 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the ETACS-ECU connector.

STEP 33. Connector check: C-119 SRS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 34.

Repair the defective connector.

STEP 34. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN2) and the SRS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.4 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the SRS-ECU connector.

STEP 35. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.7 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the diagnosis connector.

STEP 36. Resistance measurement at C-09 joint connector (CAN2).
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between C-09 joint connector (CAN2) terminal No.11 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN2) and the intermediate connector.

STEP 37. Connector check: A-07 joint connector (CAN1)
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .
When checking the joint connector, ensure that its wiring harness side is not damaged.

Q. Is the check result normal?

Go to Step 38.

Repair a defective connector or replace the joint connector (front wiring harness assembly).

STEP 38. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .

(1)Disconnect the connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.6 and body earth
OK: 1 kΩ or more

(4)Resistance between A-07 joint connector (CAN1) terminal No.5 and body earth
OK: 1 kΩ or more

Q. Are the check result normal?

YES <all of the measurement results show 1 kΩ or more> : Go to Step 44.

NO <The resistance between terminal No.6 and body earth is less than 1 kΩ> : Go to Step 39.

NO <The resistance between terminal No.5 and body earth is less than 1 kΩ> : Go to Step 42.

STEP 39. Connector check: A-16 intermediate connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 40.

Repair the defective connector.

STEP 40. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.6 and body earth
OK: 1 kΩ or more

Q. Is the check result normal?

<1 kΩ or more> Go to Step 41.

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.

STEP 41. Resistance measurement at the A-16 intermediate connector.
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the engine-A/T-ECU connector and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-16 intermediate connector terminal No.6 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 Ω> Repair the wiring harness between the intermediate connector and the engine-A/T-ECU connector.

STEP 42. Connector check: A-03 ABS-ECU connector

caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?

Go to Step 43.

Repair the defective connector.

STEP 43. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the ABS-ECU connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.5 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the ABS-ECU connector.

STEP 44. Resistance measurement at the A-07 joint connector (CAN1).
note When checking A-07 joint connector (CAN1), disassemble and check the engine compartment relay box by referring to .
caution A digital multimeter should be used. For details refer to .
caution The test wiring harness should be used. For details refer to .


(1)Disconnect the joint connector (CAN1) and the intermediate connector, and measure at the wiring harness side.
(2)
caution When measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.

(3)Resistance between A-07 joint connector (CAN1) terminal No.4 and body earth
OK: 1 kΩ or more
(4)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<1 kΩ or more> Follow diagnostic item 15, Diagnose CAN bus lines thoroughly. Refer to .

<less than 1 kΩ> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.