[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54C-CONTROLLER AREA NETWORK (CAN) > TROUBLESHOOTING<CAN><CAN> > CAN BUS DIAGNOSIS > DIAGNOSIS ITEM 4
Diagnosis Item 4: Diagnose shorts between CAN_H and L lines (CAN-C).
 
 
cautionWhen 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.-IIISE determines that a short circuit is present between CAN_L and CAN_H lines.
  • The M.U.T.-IIISE 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 steering column switch (steering wheel sensor)
  • Malfunction of the SRS-ECU
  • Malfunction of the clearance warning control unit <Vehicles with corner sensor system>
  • Malfunction of the gateway-ECU <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>
  • Malfunction of the electric parking brake ECU <Vehicles with electric parking brake>
  • Malfunction of the FCM/LDW/AHB-ECU
  • Malfunction of the AWC-ECU <4WD>
  • Malfunction of the CVT-ECU <CVT>
  • Malfunction of the ASC-ECU
  • Malfunction of the EPS-ECU
  • Malfunction of the ACC/FCM-ECU <Vehicles with ACC>
  • Malfunction of the engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-149 intermediate connector
cautionThe strand end of the twist wire should be within 10 cm from the connector. For details refer to .
Is the check result normal?
Go to Step 2.
Repair the defective connector.
 
STEP 2. Resistance measurement at C-149 intermediate connector.
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the 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)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between C-149 intermediate connector terminal Nos.19 and 18
OK: 120 ± 20 Ω
Is the check result normal?
<Within 120 ± 20 Ω> Go to Step 18.
<Not within 120 ± 20 Ω> Go to Step 3.
 
STEP 3. Connector check: joint connector (CAN3)
cautionThe 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.
Is the check result normal?
YES <vehicles with ACC> : Go to Step 4.
YES <vehicles without ACC> : Go to Step 5.
Repair a defective connector or replace the joint connector.
 
STEP 4. Connector check: joint connector (CAN4)
cautionThe 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.
Is the check result normal?
Go to Step 5.
Repair a defective connector or replace the joint connector.
 
STEP 5. Resistance measurement at joint connector (CAN3).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN3) terminal Nos.10 and 21
OK: 120 ± 20 Ω
Is the check result normal?
YES <CVT> : <Within 120 ± 20 Ω> Go to Step 10.
YES <M/T> : <Within 120 ± 20 Ω> Go to Step 12.
NO <vehicles with ACC> : <Not within 120 ± 20 Ω> Go to Step 6.
NO <vehicles without ACC> : <Not within 120 ± 20 Ω> Go to Step 8.
 
STEP 6. Resistance measurement at joint connector (CAN4).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN4) terminal Nos.9 and 20
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 8.
<Less than 1 kΩ> Go to Step 7.
 
STEP 7. Resistance measurement at ACC/FCM-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the ACC/FCM-ECU, and measure at the equipment side.
(2) Resistance between ACC/FCM-ECU connector terminal Nos.6 and 1
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN4) and the ACC/FCM-ECU connector.
<Less than 1 kΩ> Check the ACC/FCM-ECU connector, and repair if necessary. If the ACC/FCM-ECU connector is in good condition, replace the ACC/FCM-ECU.
 
STEP 8. Resistance measurement at joint connector (CAN4).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN4) terminal Nos.10 and 21
OK: 120 ± 20 Ω
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
YES : <Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN4) and the joint connector (CAN3).
<Not within 120 ± 20 Ω> Go to Step 9.
 
STEP 9. Resistance measurement at engine-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the engine-ECU, and measure at the equipment side.
(2) Resistance between engine-ECU connector terminal Nos.151 and 152
OK: 120 ± 20 Ω
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN4) 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.
 
STEP 10. Resistance measurement at joint connector (CAN3).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN3) terminal Nos.5 and 16
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 12.
<Less than 1 kΩ> Go to Step 11.
 
STEP 11. Resistance measurement at CVT-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the CVT-ECU, and measure at the equipment side.
(2) Resistance between CVT-ECU connector terminal Nos.9 and 10
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) and the CVT-ECU connector.
<Less than 1 kΩ> Check the CVT-ECU connector, and repair if necessary. If the CVT-ECU connector is in good condition, replace the CVT-ECU.
 
STEP 12. Resistance measurement at joint connector (CAN3).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN3) terminal Nos.8 and 19
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 14.
<Less than 1 kΩ> Go to Step 13.
 
STEP 13. Resistance measurement at ASC-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the ASC-ECU, and measure at the equipment side.
(2) Resistance between ASC-ECU connector terminal Nos.11 and 10
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) and the ASC-ECU connector.
<Less than 1 kΩ> Check the ASC-ECU connector, and repair if necessary. If the ASC-ECU connector is in good condition, replace the ASC-ECU.
 
STEP 14. Resistance measurement at joint connector (CAN3).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN3) terminal Nos.9 and 20
OK: 1 kΩ or more
Is the check result normal?
YES <LHD, or vehicles without electric parking brake> : <1 kΩ or more> Repair the wiring harness between joint connector (CAN3) and C-149 intermediate connector.
YES <RHD (vehicles with electric parking brake)> : <1 kΩ or more> Go to Step 16.
<Less than 1 kΩ> Go to Step 15.
 
STEP 15. Resistance measurement at EPS-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the EPS-ECU, and measure at the equipment side.
(2) Resistance between EPS-ECU connector terminal Nos.26 and 25
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
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 (CAN3) and the EPS-ECU connector.
<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.
 
STEP 16. Resistance measurement at joint connector (CAN3).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN3) terminal Nos.6 and 17
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN3) and C-149 intermediate connector.
<Less than 1 kΩ> Go to Step 17.
 
STEP 17. Resistance measurement at electric parking brake ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the electric parking brake ECU, and measure at the equipment side.
(2) Resistance between electric parking brake ECU connector terminal Nos.40 and 30
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
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 (CAN3) 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.
 
STEP 18. Connector check: joint connector (CAN1)
cautionThe 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.
Is the check result normal?
Go to Step 19.
Repair a defective connector or replace the joint connector.
 
STEP 19. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.8 and 19 <LHD>
OK: 120 ± 20 Ω
(5) Resistance between joint connector (CAN1) terminal Nos.7 and 18 <RHD>
OK: 120 ± 20 Ω
Is the check result normal?
YES <4WD> : <Within 120 ± 20 Ω> Go to Step 21.
YES <2WD> : <Within 120 ± 20 Ω> Go to Step 23.
NO : <Not within 120 ± 20 Ω> Go to Step 20.
 
STEP 20. Resistance measurement at ETACS-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the ETACS-ECU, and measure at the equipment side.
(2) Resistance at ETACS-ECU connector terminal Nos.19 and 18
OK: 120 ± 20 Ω
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<Within 120 ± 20 Ω> Repair the wiring harness between joint connector (CAN1) 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.
 
STEP 21. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.11 and 22
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 23.
<Less than 1 kΩ> Go to Step 22.
 
STEP 22. Resistance measurement at AWC-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the AWC-ECU, and measure at the equipment side.
(2) Resistance at AWC-ECU connector terminal Nos.2 and 8
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Check intermediate connector or joint connector (CAN2), and repair if necessary. If the connector is in good condition, repair the wiring harness between joint connector (CAN1) and the AWC-ECU connector.
<Less than 1 kΩ> Check the AWC-ECU connector, and repair if necessary. If the AWC-ECU connector is in good condition, replace the AWC-ECU.
 
STEP 23. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.11 and 22
OK: 1 kΩ or more
Is the check result normal?
YES <LHD (vehicles with electric parking brake)> : <1 kΩ or more> Go to Step 25.
YES <RHD, or vehicles without electric parking brake> : <1 kΩ or more> Go to Step 27.
<Less than 1 kΩ> Go to Step 24.
 
STEP 24. Resistance measurement at FCM/LDW/AHB-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the FCM/LDW/AHB-ECU, and measure at the equipment side.
(2) Resistance at FCM/LDW/AHB-ECU connector terminal Nos.5 and 13
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Check intermediate connector or joint connector (CAN2), and repair if necessary. If the connector is in good condition, repair the wiring harness between joint connector (CAN1) and the FCM/LDW/AHB-ECU connector.
<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.
 
STEP 25. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.4 and 15
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 27.
<Less than 1 kΩ> Go to Step 26.
 
STEP 26. Resistance measurement at electric parking brake ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the electric parking brake ECU, and measure at the equipment side.
(2) Resistance at electric parking brake ECU connector terminal Nos.40 and 30
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
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.
 
STEP 27. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.10 and 21 <LHD>
OK: 1 kΩ or more
(5) Resistance between joint connector (CAN1) terminal Nos.9 and 20 <RHD>
OK: 1 kΩ or more
Is the check result normal?
YES <Vehicles with corner sensor system> : <1 kΩ or more> Go to Step 29.
YES <Vehicles without corner sensor system> : <1 kΩ or more> Go to Step 31.
<Less than 1 kΩ> Go to Step 28.
 
STEP 28. Resistance measurement at column switch connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the column switch, and measure at the equipment side.
(2) Resistance at column switch connector terminal Nos.13 and 14
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the column switch connector.
<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.
 
STEP 29. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.6 and 17
OK: 1 kΩ or more
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.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the clearance warning control unit, and measure at the equipment side.
(2) Resistance at clearance warning control unit connector terminal Nos.4 and 3
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Check the intermediate connector, and repair if necessary. If the intermediate connector is in good condition, 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.
 
STEP 31. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.9 and 20 <LHD>
OK: 1 kΩ or more
(5) Resistance between joint connector (CAN1) terminal Nos.10 and 21 <RHD>
OK: 1 kΩ or more
Is the check result normal?
YES <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system> : <1 kΩ or more> Go to Step 33.
YES <Vehicles without Blind Spot Warning [BSW] (with Lane Change Assist) system> : <1 kΩ or more> Go to Step 35.
<Less than 1 kΩ> Go to Step 32.
 
STEP 32. Resistance measurement at SRS-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(1) Remove the SRS-ECU, and measure at the equipment side.
(2) Resistance at SRS-ECU connector terminal Nos.25 and 24
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the SRS-ECU.
<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.
 
STEP 33. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.5 and 16
OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 35.
<Less than 1 kΩ> Go to Step 34.
 
STEP 34. Resistance measurement at gateway-ECU connector.
cautionA digital multimeter should be used. For details refer to .
(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
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the gateway-ECU.
<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 35. Resistance measurement at joint connector (CAN1).
cautionA digital multimeter should be used. For details refer to .
cautionThe test wiring harness should be used. For details refer to .
(1) Disconnect the joint connector (CAN1), and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3)
cautionWhen measuring the resistance, disconnect the negative battery terminal. For details refer to .
Ensure that the negative battery terminal is disconnected.
(4) Resistance between joint connector (CAN1) terminal Nos.7 and 18 <LHD>
OK: 1 kΩ or more
(5) Resistance between joint connector (CAN1) terminal Nos.8 and 19 <RHD>
OK: 1 kΩ or more
cautionStrictly observe the specified wiring harness repair procedure. For details refer to .
Is the check result normal?
<1 kΩ or more> Repair the wiring harness between joint connector (CAN1) and the C-149 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.