Diagnosis Item
4: Diagnose shorts between CAN_H and L lines (MAIN). <Vehicles
for RHD>
| 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 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 main bus lines (CAN_L and CAN_H
lines)
is 1.0 V or more, 4.0 V or less.
- The resistance at CAN main bus line (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 combination meter
- Malfunction of the gateway-ECU <Vehicles with automatic A/C, 4WD
and 5M/T>
- Malfunction of the transfer-ECU <Vehicles with 4WD>
- Malfunction of the steering wheel sensor <Vehicles with
ASTC>
- Malfunction of the KOS&OSS-ECU <Vehicles with keyless
operation
system>
- Malfunction of the SRS-ECU
- Malfunction of the ABS-ECU <Vehicles without ASTC>
or ASTC-ECU <Vehicles
with ASTC>
- Malfunction of the A/T-ECU <Vehicles with A/T>
- Malfunction of the engine-ECU
- Malfunction of the electric parking brake-ECU
- Malfunction of the clearance warning control unit <Vehicles with
ultrasonic
misacceleration mitigation, blind spot warning or corner sensor
system>
- FCM-ECU <Vehicles with forward collision mitigation
system>
|
|
STEP 1. Connector check: D-26 intermediate connector
|
|
|
| caution |
The strand end of the twist wire should be within
10 cm from
the connector.
|
|
|
|
Q.
Is the check result normal?
|
|
|
 Go to Step 2.
|
|
|
|
|
|
 Repair
the defective connector.
|
|
|
|
|
|
STEP 2. Resistance measurement at D-26 intermediate
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect intermediate connector, and measure at its
female-side intermediate
connector (at the front 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 D-26 intermediate connector terminal
No.18 and No. 19.
OK: 120 ±
20 Ω
|
|
|
Q.
Is the check result normal?
|
|
|
<Within 120 ±
20 Ω>
Go to Step 8.
|
|
|
|
|
|
<Not within 120 ±
20 Ω>
Go to Step 3.
|
|
|
|
|
|
STEP 3. Connector check: joint connector (CAN3)
|
|
|
| caution |
The strand end of the twist wire should be within
10 cm from
the connector.
|
|
|
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 4.
Repair a defective connector or
replace the joint connector.
|
|
|
STEP 4. Resistance measurement at joint connector (CAN3).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3), 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.11
and 22.
OK: 120 ±
20 Ω
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES  : <Within 120 ±
20 Ω>
Go to Step 6.
|
|
|
|
|
|
NO : <Not within 120 ±
20 Ω>
Go to Step 5.
|
|
|
|
|
|
STEP 5. Resistance measurement at engine-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the engine-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance between engine-ECU connector terminal Nos.101
and 102. <6B31>
OK: 120 ±
20 Ω
|
|
|
(3)Resistance between engine-ECU connector terminal Nos.108
and 109. <4N15
or 4D56>
OK: 120 ±
20 Ω
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
<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 (CAN3) and the engine-ECU connector.
|
|
|
|
|
|
<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
(Refer to GROUP 13B -
Engine-ECU <6B31>, GROUP 13C -
Engine-ECU <4N15>
or
GROUP 13E -
Engine-ECU  <4D56>).
|
|
|
|
|
|
STEP 6. Resistance measurement at joint connector (CAN3).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN3), 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.
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) and D-26 intermediate connector.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 7.
|
|
|
|
|
|
STEP 7. Resistance measurement at FCM-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the FCM-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance between FCM-ECU connector terminal Nos.6 and
7.
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) and the FCM-ECU connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the FCM-ECU connector, and repair
if necessary. If the FCM-ECU connector is in good condition, replace the
FCM-ECU (Refer to GROUP
35C -
FCM-ECU).
|
|
|
|
|
|
STEP 8. Connector check: joint connector (CAN1)
|
|
|
| caution |
The strand end of the twist wire should be within
10 cm from
the connector.
|
|
|
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 9.
Repair a defective connector or
replace the joint connector.
|
|
|
STEP 9. Resistance measurement at joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.10
and 21.
OK: 120 ±
20 Ω
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <Within 120 ±
20 Ω>
Go to Step 19.
|
|
|
|
|
|
<Not within 120 ±
20 Ω>
Go to Step 10.
|
|
|
|
|
|
STEP 10. Connector check: joint connector (CAN2)
|
|
|
| caution |
The strand end of the twist wire should be within
10 cm from
the connector.
|
|
|
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 11.
Repair a defective connector or
replace the joint connector.
|
|
|
STEP 11. Resistance measurement at joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN2), 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 (CAN2) terminal Nos.11
and 22.
OK: 120 ±
20 Ω
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <Within 120 ±
20 Ω>
Go to Step 13.
|
|
|
|
|
|
NO : <Not within 120 ±
20 Ω>
Go to Step 12.
|
|
|
|
|
|
STEP 12. Resistance measurement at ETACS-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the ETACS-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance at ETACS-ECU connector terminal Nos.56 and
65.
OK: 120 ±
20 Ω
|
|
|
Q.
Is the check result normal?
|
|
|
<Within 120 ±
20 Ω>
Repair the wiring harness between
joint connector (CAN2) and the ETACS-ECU connector.
|
|
|
|
|
|
<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
(Refer to GROUP 54A -
ETACS, ETACS-ECU).
|
|
|
|
|
|
STEP 13. Resistance measurement at joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN2), 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 (CAN2) terminal Nos.9
and 20.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 15.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 14.
|
|
|
|
|
|
STEP 14. Resistance measurement at KOS&OSS-ECU
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the KOS&OSS-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance between KOS&OSS-ECU connector terminal
Nos.35 and 51.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN2) and the KOS&OSS-ECU connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the KOS&OSS-ECU connector,
and repair if necessary. If the KOS&OSS-ECU connector is in good
condition, replace
the KOS&OSS-ECU (Refer to GROUP 42B -
KOS&OSS-ECU).
|
|
|
|
|
|
STEP 15. Resistance measurement at joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN2), 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 (CAN2) terminal Nos.6
and 17.
OK: 1 kΩ
or more
| caution |
Strictly observe the specified wiring harness repair
procedure.
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ
or more>
Go to Step 17.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 16.
|
|
|
|
|
|
STEP 16. Resistance measurement at SRS-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the SRS-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance between SRS-ECU connector terminal Nos.33 and
34.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN2) and the SRS-ECU connector.
|
|
|
|
|
|
<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 (Refer to GROUP
52B -
SRS-ECU).
|
|
|
|
|
|
STEP 17. Resistance measurement at joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN2), 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 (CAN2) terminal Nos.1
and 12.
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 (CAN2) and joint connector (CAN1).
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 18.
|
|
|
|
|
|
STEP 18. Resistance measurement at A/T-ECU connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the A/T-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance at A/T-ECU connector terminal Nos.16 and
24
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<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 A/T-ECU connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the A/T-ECU connector,
and repair if necessary. If the A/T-ECU connector is in good
condition, replace the
A/T-ECU (Refer to GROUP 23A -
A/T-ECU).
|
|
|
|
|
|
STEP 19. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.2
and 13.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 21.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 20.
|
|
|
|
|
|
STEP 20. Resistance measurement at electric parking brake-ECU
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the electric parking brake-ECU, and measure at the
equipment side.
|
|
|
(2)Resistance at electric parking brake-ECU connector
terminal Nos.18 and 26.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the electric parking brake-ECU connector.
|
|
|
|
|
|
<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 (Refer to GROUP 36 -
Electric Parking Brake-ECU).
|
|
|
|
|
|
STEP 21. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.3
and 14.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ
or more>
Go to Step 23.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 22.
|
|
|
|
|
|
STEP 22. Resistance measurement at ABS-ECU or ASTC-ECU
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the ABS-ECU or ASTC-ECU, and measure at the
equipment side.
|
|
|
(2)Resistance at ABS-ECU connector terminal Nos.4 and
16.
OK: 1 kΩ
or more
|
|
|
(3)Resistance at ASTC-ECU connector terminal Nos.14 and
26.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the ABS-ECU or ASTC-ECU connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the ABS-ECU or ASTC-ECU connector,
and repair if necessary. If the ABS-ECU or ASTC-ECU connector is in good
condition, replace the
ABS-ECU (Refer to GROUP 35B -
Hydraulic Unit) or ASTC-ECU (Refer to GROUP 35C -
Hydraulic Unit).
|
|
|
|
|
|
STEP 23. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.4
and 15.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 25.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 24.
|
|
|
|
|
|
STEP 24. Resistance measurement at transfer-ECU
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the transfer-ECU, and measure at the equipment
side.
|
|
|
(2)Resistance at transfer-ECU connector terminal Nos.55 and
56.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the transfer-ECU connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the transfer-ECU connector, and
repair if necessary. If the transfer-ECU connector is in good condition,
replace the transfer-ECU
(Refer to GROUP 22A -
Transfer-ECU <M/T>, GROUP
23A -
Transfer-ECU <A/T>).
|
|
|
|
|
|
STEP 25. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.5
and 6.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES : <1 kΩ
or more>
Go to Step 27.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 26.
|
|
|
|
|
|
STEP 26. Resistance measurement at combination meter
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the combination meter, and measure at the equipment
side.
|
|
|
(2)Resistance at combination meter connector terminal Nos.14
and 15.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the combination meter connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the combination meter connector,
and repair if necessary. If the combination meter connector is in good
condition, replace the combination
meter (Refer to GROUP 54A -
Combination Meter, Combination Meter).
|
|
|
|
|
|
STEP 27. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.7
and 18.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 29.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 28.
|
|
|
|
|
|
STEP 28. Resistance measurement at steering wheel sensor
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the steering wheel sensor, and measure at the
equipment side.
|
|
|
(2)Resistance at steering wheel sensor connector terminal
Nos.13 and 14.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the steering wheel sensor connector.
|
|
|
|
|
|
<Less than 1 kΩ>
Check the steering wheel sensor connector,
and repair if necessary. If the steering wheel sensor connector is in good
condition, replace the
column switch (integrated with steering wheel sensor) (Refer to GROUP 54A
-
Column
Switch).
|
|
|
|
|
|
STEP 29. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.8
and 19.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 31.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 30.
|
|
|
|
|
|
STEP 30. Resistance measurement at clearance warning control unit
connector.
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
(1)Remove the clearance warning control unit, and measure at
the equipment side.
|
|
|
(2)Resistance at clearance warning control unit connector
terminal Nos.3 and 4.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the clearance warning control unit connector.
|
|
|
|
|
|
<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 (Refer to
GROUP 54A -
Unintended
Acceleration Mitigation System/Blind Spot Warning/Corner Sensor System,
Clearance Warning Control
Unit).
|
|
|
|
|
|
STEP 31. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.9
and 20.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Go to Step 33.
|
|
|
|
|
|
<Less than 1
kΩ>
Go to Step 32.
|
|
|
|
|
|
STEP 32. 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.2 and
3.
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more>
Repair the wiring harness between joint
connector (CAN1) and the gateway-ECU connector.
|
|
|
|
|
|
<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 33. Resistance measurement at joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used.
|
|
|
|
| caution |
The test wiring harness should be used.
|
|
|
|
(1)Disconnect joint connector (CAN1), 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 (CAN1) terminal Nos.6
and 17.
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 (CAN1) and D-26 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 (CAN1) and the diagnosis connector.
|
|
|
|