INSPECTION PROCEDURE 6: Shift lever-ECU power supply circuit abnormality
| caution | Whenever the ECU is replaced, ensure that the CAN bus lines are normal. |
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- Defective battery
- Damaged harness wires and connectors
- Malfunction of the ETACS-ECU
- Malfunction of the shift lever-ECU
DIAGNOSIS PROCEDURE |
STEP 1. Check the battery. |
Refer to GROUP 54A - Battery Test  . |
Q.
Is the battery in good condition?
|
 Go to Step 2. |
|
 Charge or replace the battery. |
|
STEP 2. Measure the resistance at C-58 shift lever-ECU connector. |
| Disconnect the connector, and measure the resistance between terminal No.8 and earth at the wiring harness side. |
| OK: Continuity exists. (2 Ω or less) |
Q.
Is the check result normal?
|
| Go to Step 5. |
|
NO  : Go to Step 3. |
|
STEP 3. Shift lever-ECU connector check: C-58 |
| Check for the contact with terminals. |
Q.
Is the check result normal?
|
| Go to Step 4. |
|
| Repair the defective connector. |
|
STEP 4. Check the wiring harness between C-58 shift lever-ECU connector terminal No.8 and body earth. |
| Check the earth line for open circuit. |
Q.
Is the check result normal?
|
| Go to Step 5. |
|
| Repair the wiring harness. |
|
STEP 5. Measure the voltage at C-58 shift lever-ECU connector. |
| Disconnect the connector, and measure the voltage between terminal No.12 and earth at the wiring harness side. |
| OK: System voltage |
Q.
Is the check result normal?
|
| Go to Step 8. |
|
| Go to Step 6. |
|
STEP 6. Shift lever-ECU connector check: C-58 |
| Check for the contact with terminals. |
Q.
Is the check result normal?
|
| Go to Step 7. |
|
| Repair the defective connector. |
|
STEP 7. Check the wiring harness between C-58 shift lever-ECU connector terminal No.12 and fusible link No.36. |
| Check the power supply line for short or open circuit. |
Q.
Is the check result normal?
|
| Go to Step 8. |
|
| Repair the wiring harness. |
|
STEP 8. M.U.T.-III diagnosis code. |
| Check the ETACS diagnosis code. (Refer to GROUP 54A - Troubleshooting .) |
Q.
Is the diagnosis code set?
|
| Perform the relevant troubleshooting. |
|
| Go to Step 9. |
|
STEP 9. Measure the voltage at C-58 shift lever-ECU connector. |
| (1)Disconnect the connector, and measure the voltage between terminal No.13 and earth at the wiring harness side. |
| (2)Turn the ignition switch to the "ON" position. OK: System voltage |
Q.
Is the check result normal?
|
| Go to Step 12. |
|
| Go to Step 10. |
|
STEP 10. Inspection of the shift lever-ECU connector, intermediate connector, and ETACS-ECU connector: C-58, C-128, C-317 |
| Check for the contact with terminals. |
Q.
Is the check result normal?
|
| Go to Step 11. |
|
| Repair the defective connector. |
|
STEP 11. Check the wiring harness between C-58 shift lever-ECU connector terminal No.13 and C-317 ETACS-ECU connector terminal No.5. |
| Check the power supply line for short or open circuit. |
Q.
Is the check result normal?
|
| Go to Step 12. |
|
| Repair the wiring harness. |
|
STEP 12. Retest the system. |
Q.
Does a malfunction take place again?
|
| Replace the shift lever assembly. (Refer to .) |
|
| Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .) |
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