Diagnosis Item 4: Diagnose the CAN bus lines for short to power supply <Vehicles with A/C and TCL/ASC system>


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


Short to power supply may be present when the voltage between the CAN bus line (CAN_L or CAN_H) and body earth is more than 4.0 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 an ECU may be defective.

POSSIBLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-09 engine-ECU <M/T (except 1500-T/C) > or engine-A-M/T-ECU <Automated manual transmission> connector, A-35 engine-ECU <M/T (1500-T/C) > , B-19 combination meter connector and B-16 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 results normal?

Go to Step 2.

Repair the defective connector.

STEP 2. Voltage measurement at the B-16 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-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> connector and the combination meter connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-16 diagnosis connector terminal No.14 and body earth
OK: 4.0 V or less

(4)Voltage between B-16 diagnosis connector terminal No.6 and body earth
OK: 4.0 V or less
(5)Disconnect the negative battery terminal.

Q. Are the check results normal?

YES <all of the measurement results show 4.0 V or less> : It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

NO <The voltage between terminal No.14 and body earth is more than 4.0 V> : Go to Step 3.

NO <The voltage between terminal No.6 and body earth is more than 4.0 V> : Go to Step 28.

STEP 3. Connector check: B-118 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. Voltage measurement at the B-118 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 female-side intermediate connector (at the front wiring harness side).
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-118 intermediate connector terminal No.12 and body earth
OK: 4.0 V or less

Q. Is the check result normal?

<4.0 V or less> Go to Step 5.

<more than 4.0 V> Go to Step 18.

STEP 5. Connector check: B-03 joint connector (CAN1)


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. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.15 and body earth
OK: 4.0 V or less

(4)Voltage between B-03 joint connector (CAN1) terminal No.16 and body earth
OK: 4.0 V or less

(5)Voltage between B-03 joint connector (CAN1) terminal No.17 and body earth <L.H. drive vehicles>
OK: 4.0 V or less

(6)Voltage between B-03 joint connector (CAN1) terminal No.14 and body earth <R.H. drive vehicles>
OK: 4.0 V or less

(7)Voltage between B-03 joint connector (CAN1) terminal No.18 and body earth
OK: 4.0 V or less

(8)Voltage between B-03 joint connector (CAN1) terminal No.20 and body earth
OK: 4.0 V or less

(9)Voltage between B-03 joint connector (CAN1) terminal No.21 and body earth
OK: 4.0 V or less
(10)Disconnect the negative battery terminal.

Q. Are the check results normal?

YES <all of the measurement results show 4.0 V or less> : Go to Step 17.

NO <The voltage between terminal No.15 and body earth is more than 4.0 V> : Go to Step 7.

NO <The voltage between terminal No.16 and body earth is more than 4.0 V> : Go to Step 8.

NO <The voltage between terminal No.17 and body earth is more than 4.0 V> : Go to Step 10.

NO <The voltage between terminal No.14 and body earth is more than 4.0 V> : Go to Step 10.

NO <The voltage between terminal No.18 and body earth is more than 4.0 V> : Go to Step 12.

NO <The voltage between terminal No.20 and body earth is more than 4.0 V> : Go to Step 14.

NO <The voltage between terminal No.21 and body earth is more than 4.0 V> : Go to Step 16.

STEP 7. Voltage measurement at B-03 joint connector (CAN1).
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 combination meter connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.15 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between joint connector (CAN1) and the combination meter connector.

STEP 8. Connector check: B-233 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 9.

Repair the defective connector.

STEP 9. Voltage measurement at B-03 joint connector (CAN1).
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 ETACS-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.16 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the ETACS-ECU connector.

STEP 10. Connector check: B-113 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 11.

Repair the defective connector.

STEP 11. Voltage measurement at B-03 joint connector (CAN1).
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 A/C-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.17 and body earth <L.H. drive vehicles>
OK: Less than 1.0 V

(4)Voltage between B-03 joint connector (CAN1) terminal No.14 and body earth <R.H. drive vehicles>
OK: Less than 1.0 V
(5)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the A/C-ECU connector.

STEP 12. Connector check: B-109 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. Voltage measurement at B-03 joint connector (CAN1).
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 SRS-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.18 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the SRS-ECU connector.

STEP 14. Connector check: B-241 steering wheel sensor 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 15.

Repair the defective connector.

STEP 15. Voltage measurement at B-03 joint connector (CAN1).
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 steering wheel sensor connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.20 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the steering wheel sensor connector.

STEP 16. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.21 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the diagnosis connector.

STEP 17. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.22 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.

STEP 18. Connector check: B-107 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 is not damaged.

Q. Is the check result normal?

Go to Step 19.

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

STEP 19. Voltage measurement at the B-107 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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.18 and body earth
OK: 4.0 V or less

(4)Voltage between B-107 joint connector (CAN2) terminal No.22 and body earth
OK: 4.0 V or less

(5)Voltage between B-107 joint connector (CAN2) terminal No.21 and body earth
OK: 4.0 V or less

(6)Voltage between B-107 joint connector (CAN2) terminal No.19 and body earth
OK: 4.0 V or less
(7)Disconnect the negative battery terminal.

Q. Are the check results normal?

YES <all of the measurement results show 4.0 V or less> : Go to Step 27.

NO <The voltage between terminal No.18 and body earth is more than 4.0 V> : Go to Step 20.

NO <The voltage between terminal No.22 and body earth is more than 4.0 V> : Go to Step 21.

NO <The voltage between terminal No.21 and body earth is more than 4.0 V> : Go to Step 23.

NO <The voltage between terminal No.19 and body earth is more than 4.0 V> : Go to Step 25.

STEP 20. Voltage measurement at the B-107 joint connector (CAN1).
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-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> connector and the joint connector (CAN2), and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN1) terminal No.18 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the intermediate connector and the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> connector.

STEP 21. Connector check: A-06 TCL/ASC-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. Voltage measurement at the B-107 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 TCL/ASC-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.22 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

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

STEP 23. Connector check: B-106 electric power steering-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 24.

Repair the defective connector.

STEP 24. Voltage measurement at the B-107 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 electric power steering-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.21 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the electric power steering-ECU connector.

STEP 25. Connector check: C-26 G and yaw rate sensor 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 26.

Repair the defective connector.

STEP 26. Voltage measurement at the B-107 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 G and yaw rate sensor connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.19 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the G and yaw rate sensor connector.

STEP 27. Voltage measurement at the B-107 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 intermediate connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.20 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the intermediate connector.

STEP 28. Connector check: B-118 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 29.

Repair the defective connector.

STEP 29. Voltage measurement at the B-118 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 female-side intermediate connector (at the front wiring harness side).
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-118 intermediate connector terminal No.13 and body earth
OK: 4.0 V or less

Q. Is the check result normal?

<4.0 V or less> Go to Step 30.

<more than 4.0 V> Go to Step 43.

STEP 30. Connector check: B-03 joint connector (CAN1)


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 31.

Repair a defective connector or replace the joint connector.

STEP 31. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.4 and body earth
OK: 4.0 V or less

(4)Voltage between B-03 joint connector (CAN1) terminal No.5 and body earth
OK: 4.0 V or less

(5)Voltage between B-03 joint connector (CAN1) terminal No.6 and body earth <L.H. drive vehicles>
OK: 4.0 V or less

(6)Voltage between B-03 joint connector (CAN1) terminal No.3 and body earth <R.H. drive vehicles>
OK: 4.0 V or less

(7)Voltage between B-03 joint connector (CAN1) terminal No.7 and body earth
OK: 4.0 V or less

(8)Voltage between B-03 joint connector (CAN1) terminal No.9 and body earth
OK: 4.0 V or less

(9)Voltage between B-03 joint connector (CAN1) terminal No.10 and body earth
OK: 4.0 V or less
(10)Disconnect the negative battery terminal.

Q. Are the check results normal?

YES <all of the measurement results show 4.0 V or less> : Go to Step 42.

NO <The voltage between terminal No.4 and body earth is more than 4.0 V> : Go to Step 32.

NO <The voltage between terminal No.5 and body earth is more than 4.0 V> : Go to Step 33.

NO <The voltage between terminal No.6 and body earth is more than 4.0 V> : Go to Step 35.

NO <The voltage between terminal No.3 and body earth is more than 4.0 V> : Go to Step 35.

NO <The voltage between terminal No.7 and body earth is more than 4.0 V> : Go to Step 37.

NO <The voltage between terminal No.9 and body earth is more than 4.0 V> : Go to Step 39.

NO <The voltage between terminal No.10 and body earth is more than 4.0 V> : Go to Step 41.

STEP 32. Voltage measurement at B-03 joint connector (CAN1).
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 combination meter connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.4 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between joint connector (CAN1) and the combination meter connector.

STEP 33. Connector check: B-233 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 34.

Repair the defective connector.

STEP 34. Voltage measurement at B-03 joint connector (CAN1).
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 ETACS-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.5 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the ETACS-ECU connector.

STEP 35. Connector check: B-113 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 36.

Repair the defective connector.

STEP 36. Voltage measurement at B-03 joint connector (CAN1).
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 A/C-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.6 and body earth <L.H. drive vehicles>
OK: Less than 1.0 V

(4)Voltage between B-03 joint connector (CAN1) terminal No.3 and body earth <R.H. drive vehicles>
OK: Less than 1.0 V
(5)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the A/C-ECU connector.

STEP 37. Connector check: B-109 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 38.

Repair the defective connector.

STEP 38. Voltage measurement at B-03 joint connector (CAN1).
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 SRS-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.7 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the SRS-ECU connector.

STEP 39. Connector check: B-241 steering wheel sensor 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. Voltage measurement at B-03 joint connector (CAN1).
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 steering wheel sensor connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.9 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the steering wheel sensor connector.

STEP 41. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.10 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the diagnosis connector.

STEP 42. Voltage measurement at B-03 joint connector (CAN1).
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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-03 joint connector (CAN1) terminal No.11 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN1) and the intermediate connector.

STEP 43. Connector check: B-107 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 is not damaged.

Q. Is the check result normal?

Go to Step 44.

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

STEP 44. Voltage measurement at the B-107 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)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.7 and body earth
OK: 4.0 V or less

(4)Voltage between B-107 joint connector (CAN2) terminal No.11 and body earth
OK: 4.0 V or less

(5)Voltage between B-107 joint connector (CAN2) terminal No.10 and body earth
OK: 4.0 V or less

(6)Voltage between B-107 joint connector (CAN2) terminal No.8 and body earth
OK: 4.0 V or less
(7)Disconnect the negative battery terminal.

Q. Are the check results normal?

YES <all of the measurement results show 4.0 V or less> : Go to Step 52.

NO <The voltage between terminal No.7 and body earth is more than 4.0 V> : Go to Step 45.

NO <The voltage between terminal No.11 and body earth is more than 4.0 V> : Go to Step 46.

NO <The voltage between terminal No.10 and body earth is more than 4.0 V> : Go to Step 48.

NO <The voltage between terminal No.8 and body earth is more than 4.0 V> : Go to Step 50.

STEP 45. Voltage measurement at the B-107 joint connector (CAN1).
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-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> connector and the joint connector (CAN2), and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN1) terminal No.7 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the intermediate connector and the engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission> connector.

STEP 46. Connector check: A-06 TCL/ASC-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 47.

Repair the defective connector.

STEP 47. Voltage measurement at the B-107 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 TCL/ASC-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.11 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

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

STEP 48. Connector check: B-106 electric power steering-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 49.

Repair the defective connector.

STEP 49. Voltage measurement at the B-107 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 electric power steering-ECU connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.10 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the electric power steering-ECU connector.

STEP 50. Connector check: C-26 G and yaw rate sensor 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 51.

Repair the defective connector.

STEP 51. Voltage measurement at the B-107 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 G and yaw rate sensor connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.8 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the G and yaw rate sensor connector.

STEP 52. Voltage measurement at the B-107 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 intermediate connector, and measure at the wiring harness side.
(2)Connect the negative battery terminal, and turn the ignition switch to the ON position.

(3)Voltage between B-107 joint connector (CAN2) terminal No.9 and body earth
OK: Less than 1.0 V
(4)Disconnect the negative battery terminal.
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?

<less than 1.0 V> It is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

<1.0 V or more> Repair the wiring harness between the joint connector (CAN2) and the intermediate connector.