STEP 1. Check the CAN-C (Main). Voltage measurement at gateway-ECU 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, gateway-ECU connector and ETACS-ECU connector, and measure the voltage at the harness side of gateway-ECU connector.
(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between gateway-ECU connector terminal No.3 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between gateway-ECU connector terminal No.2 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<Both of the measurement results show 4.0 volts or less> Go to Step 36. <Either of CAN_H line or CAN_L line the measurement results show more than 4.0 volts> Go to Step 2.
STEP 2. Check the CAN-C (Main). Voltage measurement at C-149 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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between C-149 intermediate connector terminal No.19 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between C-149 intermediate connector terminal No.18 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 16. <More than 4.0 volts> Go to Step 3.
STEP 3. Check the CAN-C (Main) between joint connector (CAN3) and the ECM. 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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN3) terminal No.10 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN3) terminal No.21 (CAN_L) and body groundOK: 4.0 volts or less
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 7. : <More than 4.0 volts> Repair the wiring harness between joint connector (CAN3) and the ECM connector.
: <More than 4.0 volts> Go to Step 4.
STEP 4. Check the CAN-C (Main) between joint connector (CAN4) and the ACC/FCM-ECU. Voltage measurement at joint connector (CAN4).
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect joint connector (CAN4), 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 joint connector (CAN4) terminal No.9 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN4) terminal No.20 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Repair the wiring harness between joint connector (CAN3) and the ECM connector. <More than 4.0 volts> Go to Step 5.
STEP 5. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ACC/FCM-ECU connector disconnected]
STEP 6. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 7. Check the CAN-C (Main) between joint connector (CAN3) and the TCM. 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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN3) terminal No.7 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN3) terminal No.18 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 10. <More than 4.0 volts> Go to Step 8.
STEP 8. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [TCM connector disconnected]
STEP 9. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 10. Check the CAN-C (Main) between joint connector (CAN3) and the ASC-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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN3) terminal No.8 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN3) terminal No.19 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 13. <More than 4.0 volts> Go to Step 11.
STEP 11. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ASC-ECU connector disconnected]
STEP 12. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 13. Check the CAN-C (Main) between joint connector (CAN3) and the EPS-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 . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect joint connector (CAN3), 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 joint connector (CAN3) terminal No.9 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN3) terminal No.20 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Repair intermediate connector C-149, or the wiring harness between joint connector (CAN3) and the intermediate connector C-149. <More than 4.0 volts> Go to Step 14.
STEP 14. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [EPS-ECU connector disconnected]
STEP 15. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 16. Check the CAN-C (Main) between joint connector (CAN1) and the ETACS-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 . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect joint connector (CAN1), 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 joint connector (CAN1) terminal No.8 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.19 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 17. <More than 4.0 volts> Repair the wiring harness between joint connector (CAN1) and the ETACS-ECU connector.
STEP 17. Check the CAN-C (Main) between joint connector (CAN1) and the FCM/LDW/AHB-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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN1) terminal No.11 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.22 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 23. : <More than 4.0 volts> Go to Step 18. : <More than 4.0 volts> Go to Step 21.
STEP 18. Check the CAN-C (Main) between joint connector (CAN2) and the AWC-ECU. Voltage measurement at 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 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 joint connector (CAN2) terminal No.9 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN2) terminal No.20 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 21. <More than 4.0 volts> Go to Step 19.
STEP 19. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [AWC-ECU connector disconnected]
STEP 20. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 21. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [FCM/LDW/AHB-ECU connector disconnected]
STEP 22. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 23. Check the CAN-C (Main) between joint connector (CAN1) and the column switch. 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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN1) terminal No.10 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.21 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 26. <More than 4.0 volts> Go to Step 24.
STEP 24. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [column switch connector disconnected]
STEP 25. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 26. Check the CAN-C (Main) between joint connector (CAN1) and the occupant classification-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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN1) terminal No. 3 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No. 14 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 29. <More than 4.0 volts> Go to Step 27.
STEP 27. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [occupant classification-ECU connector disconnected]
STEP 28. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 29. Check the CAN-C (Main) between joint connector (CAN1) and the SRS-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 battery terminal, and turn the ignition switch to the "ON" position.
(3) Voltage between joint connector (CAN1) terminal No.9 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.20 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
: <4.0 volts or less> Go to Step 32. : <4.0 volts or less> Go to Step 35. <More than 4.0 volts> Go to Step 30.
STEP 30. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [SRS-ECU connector disconnected]
STEP 31. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 32. Check the CAN-C (Main) between joint connector (CAN1) and the electric parking brake 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 . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect joint connector (CAN1), 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 joint connector (CAN1) terminal No.4 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.15 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Go to Step 35. <More than 4.0 volts> Go to Step 33.
STEP 33. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [electric parking brake ECU connector disconnected]
STEP 34. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 35. Check the CAN-C (Main) between joint connector (CAN1) and the gateway-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 . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect joint connector (CAN1), 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 joint connector (CAN1) terminal No.2 (CAN_H) and body groundOK: 4.0 volts or less
(4) Voltage between joint connector (CAN1) terminal No.13 (CAN_L) and body groundOK: 4.0 volts or less
(5) Disconnect the negative battery terminal.
Is the check result normal?
<4.0 volts or less> Repair the wiring harness between joint connector (CAN2) and C-149 intermediate connector. <More than 4.0 volts> Repair the wiring harness between joint connector (CAN2) and the gateway-ECU connector.
STEP 36. Scan tool (M.U.T.-IIISE) CAN bus diagnostics [ETACS-ECU connector disconnected]
(1) Disconnect ETACS-ECU connector and read all diagnosis with the scan tool (M.U.T.-IIISE).
(2) Confirm that all diagnosis reading results are as shown in the table.
Are all diagnosis reading results as shown in the table?
Go to Step 38. Check the ETACS-ECU connector, and repair if necessary. If the ETACS-ECU connector is in good condition, go to Step 37.
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 [ECM connector disconnected]
(1) Disconnect ECM connector and read all diagnosis with the scan tool (M.U.T.-IIISE).
(2) Confirm that all diagnosis reading results are as shown in the table.
Are all diagnosis reading results as shown in the table?
Check the gateway-ECU connector, and repair if necessary. If the gateway-ECU connector is in good condition, go to Step 40. Check the ECM connector, and repair if necessary. If the ECM connector is in good condition, go to Step 39.
STEP 39. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)
STEP 40. Scan tool (M.U.T.-IIISE) CAN bus diagnostics (retest the system)