INSPECTION PROCEDURE 1: The M.U.T.-III cannot communicate with TC-SST-ECU.
| caution | Whenever the ECU is replaced, ensure that the CAN bus lines are normal. |
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- Wrong M.U.T.-III wiring harness
- The CAN bus line is defective.
- Malfunction of TC-SST-ECU power supply circuit
- Malfunction of TC-SST-ECU
- ECU malfunction of other system
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III CAN bus diagnostics |
| Use M.U.T.-III to perform the CAN bus diagnosis. |
Q.
Is the check result normal?
|
 Check and repair the TC-SST-ECU power supply circuit. (Refer to  .) |
|
 Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .) |
|