Troubleshooting Hints
- Damaged wiring harness and connectors
- Malfunction of KOS-ECU
- STEP 1. Check KOS-ECU connector C-31 and ETACS-ECU connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the KOS-ECU connector C-31 and ETACS-ECU connector C-317 in good condition?
- YES: Go to Step 2.
- NO: Repair the defective connector.
- STEP 2. Check the wiring harness between the KOS-ECU connector C-31 (terminal No. 38, 39) and the ETACS-ECU connector C-317 (terminal No. 10, 5) and between the KOS-ECU connector C-31 (terminal No. 14) and the body ground.
- Check the power supply line for open and short circuit, and check the ground line for open circuit.
Q: Is the wiring harness between KOS-ECU connector C-31 (terminal No. 38, 39) and the ETACS-ECU connector C-317 (terminal No. 10, 5) and between the KOS-ECU connector C-31 (terminal No. 14) and the body ground in good condition?
- YES: Go to Step 3.
- NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
- Check the power supply line for open and short circuit, and check the ground line for open circuit.
- STEP 3. Retest the system
Q: Does the abnormality in KOS-ECU power supply and ground circuits in good condition?
- YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
- NO: Replace KOS-ECU and register the ID codes. (Refer to ID CODES REGISTRATION JUDGMENT TABLE .)