STEP 1. Check the CAN-C. Voltage measurement at data link connector.
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
note | This inspection allows you to check that there is a short to power supply in either CAN_H line or CAN_L line. Thus, in the following steps, check the CAN-C that is defective. |
(1) Disconnect ECM connector and ETACS-ECU connector, and measure the voltage at the harness side of data link connector.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between data link connector terminal No.6 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between data link connector terminal No.14 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<Both of the measurement results show 4.0 V or less> Go to Step 36. <Either of CAN_H line or CAN_L line the measurement results show more than 4.0 V> Go to Step 2.
STEP 2. Check the CAN-C. Voltage measurement at C-126 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 intermediate connector, and measure at its female-side intermediate connector (at the front wiring harness side).
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between C-126 intermediate connector terminal No.15 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between C-126 intermediate connector terminal No.16 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 16. <More than 4.0 V> Go to Step 3.
STEP 3. Check the CAN-C between joint connector (CAN1) and the ECM. Voltage measurement at 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 joint connector (CAN1), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN1) terminal No.2 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN1) terminal No.11 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
: <4.0 V or less> Go to Step 7. <More than 4.0 V> Go to Step 4.
STEP 4. Check the CAN-C between joint connector (CAN2) and the ACC-ECU <Vehicles with ACC>. Voltage measurement at joint connector (CAN2).
note | Step 4, 5 and 6 are only for vehicles with ACC. On vehicles without it, go to Step 7. |
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 joint connector (CAN2), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN2) terminal No.3 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN2) terminal No.14 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
Is the check result normal?
<4.0 V or less> Repair the wiring harness between joint connector (CAN1) and the ECM connector. <More than 4.0 V> Go to Step 5.
STEP 5. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ACC-ECU connector disconnected]
(1) Disconnect ACC-ECU connector, and diagnose by using the scan tool (M.U.T.-IIISE).
(2) Diagnose CAN-C, and check if scan tool (M.U.T.-IIISE) screen is as shown in the illustration.
Does scan tool (M.U.T.-IIISE) screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN2) and the ACC-ECU connector. Check the ACC-ECU connector, and repair if necessary. If the ACC-ECU connector is in good condition, go to Step 6.
STEP 6. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 7. Check the CAN-C between joint connector (CAN1) and the PHEV-ECU. Voltage measurement at 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 joint connector (CAN1), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN1) terminal No.5 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN1) terminal No.14 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 10. : <More than 4.0 V> Go to Step 8.
STEP 8. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [PHEV-ECU connector disconnected]
STEP 9. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 10. Check the CAN-C between joint connector (CAN1) and the EPS-ECU. Voltage measurement at 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 joint connector (CAN1), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN1) terminal No.4 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN1) terminal No.13 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 13. <More than 4.0 V> Go to Step 11.
STEP 11. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [EPS-ECU connector disconnected]
STEP 12. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 13. Check the CAN-C between joint connector (CAN1) and the ASC-ECU. Voltage measurement at 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 joint connector (CAN1), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN1) terminal No.3 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN1) terminal No.12 (CAN_L) and body groundOK: 4.0 V or less
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Repair intermediate connector C-126, or the wiring harness between joint connector (CAN1) and the intermediate connector C-126. <More than 4.0 V> Go to Step 14.
STEP 14. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ASC-ECU connector disconnected]
STEP 15. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 16. Check the CAN-C between joint connector (CAN3) and the ETACS-ECU. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.11 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.22 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
Is the check result normal?
<4.0 V or less> Go to Step 17. : <More than 4.0 V> Repair the wiring harness between joint connector (CAN3) and the ETACS-ECU connector.
STEP 17. Check the CAN-C between joint connector (CAN3) and the column switch. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.6 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.17 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 20. <More than 4.0 V> Go to Step 18.
STEP 18. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [column switch connector disconnected]
STEP 19. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 20. Check the CAN-C between joint connector (CAN3) and the occupant classification-ECU. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.4 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.15 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 23. <More than 4.0 V> Go to Step 21.
STEP 21. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [occupant classification-ECU connector disconnected]
STEP 22. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 23. Check the CAN-C between joint connector (CAN3) and the FCM/LDW/AHB-ECU <Vehicles with FCM>. Voltage measurement at joint connector (CAN3).
note | Step 23, 24 and 25 are only for vehicles with FCM. On vehicles without it, go to Step 26. |
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.7 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.18 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 26. <More than 4.0 V> Go to Step 24.
STEP 24. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [FCM/LDW/AHB-ECU connector disconnected]
STEP 25. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 26. Check the CAN-C between joint connector (CAN3) and the SRS-ECU. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.8 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.19 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 29. <More than 4.0 V> Go to Step 27.
STEP 27. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [SRS-ECU connector disconnected]
STEP 28. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 29. Check the CAN-C between joint connector (CAN3) and the electric parking brake ECU. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.1 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.12 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 32. <More than 4.0 V> Go to Step 30.
STEP 30. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [electric parking brake ECU connector disconnected]
STEP 31. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 32. Check the CAN-C between joint connector (CAN3) and the gateway-ECU <Vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system>. Voltage measurement at joint connector (CAN3).
note | Step 32, 33 and 34 are only for vehicles with Blind Spot Warning [BSW] (with Lane Change Assist) system. On vehicles without it, go to Step 35. |
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.2 (CAN_H) and body groundOK: 4.0 V or less
(4) Voltage between joint connector (CAN3) terminal No.13 (CAN_L) and body groundOK: 4.0 V or less
(5) Disconnect the negative 12V starter battery terminal.
Is the check result normal?
<4.0 V or less> Go to Step 35. <More than 4.0 V> Go to Step 33.
STEP 33. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [gateway-ECU connector disconnected]
STEP 34. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 35. Check the CAN-C between joint connector (CAN3) and the data link connector. Voltage measurement at joint connector (CAN3).
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 joint connector (CAN3), and measure at the wiring harness side.
(2) Connect the negative 12V starter battery terminal, and turn on the power supply mode of the electric motor switch.
(3) Voltage between joint connector (CAN3) terminal No.9 (CAN_H) and body groundOK: Less than 1.0 V
(4) Voltage between joint connector (CAN3) terminal No.20 (CAN_L) and body groundOK: Less than 1.0 V
(5) Disconnect the negative 12V starter battery terminal.caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
Is the check result normal?
<Less than 1.0 V> Repair the intermediate connector C-126, or the wiring harness between joint connector (CAN3) and the intermediate connector C-126. <1.0 V or more> Repair the data link connector, or the wiring harness between joint connector (CAN3) and the data link connector.
STEP 36. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ECM connector disconnected]
STEP 37. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 38. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ETACS-ECU connector disconnected]
STEP 39. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)