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REVERSING SENSOR SYSTEM CHASSIS ELECTRICAL 54A-238 COMMENTS ON TROUBLE SYMPTOM PROBABLE CAUSES • Damaged harness wires and connectors • Malfunction of corner sensor/back sensor-ECU • Malfunction of the ETACS-ECU DIAGNOSIS PROCEDURE STEP 1. Connector check: C-43 sonar switch Q: Is the check result normal? YES : Go to Step 2. NO : Repair the defective connector. STEP 2. Sonar switch check Q: Is the check result normal? YES : Go to Step 3. NO : Replace the sonar switch. STEP 3. M.U.T.-III other system diagnosis code Q: Is the check result normal? YES : Troubleshoot the ETACS-ECU. Refer to ETACS-ECU − Troubleshooting . NO : Go to Step 4. STEP 4. Voltage measurement at the C-43 sonar wiring harness side. (2) Turn the ignition switch to the "ON" position. switch connector (terminal No. 5) and the body OK: System voltage Q: Is the check result normal? YES : Go to Step 6. NO : Go to Step 5. STEP 5. Wiring harness check from C-317 • Check the communication line for open circuit or short circuit. NOTE: Before the wiring harness inspection, inspect Q: Is the check result normal? YES : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The ignition switch NO : Repair the wiring harness. STEP 6. Connector check: C-40 corner sensor/ Q: Is the check result normal? YES : Go to Step 7. NO : Repair the defective connector. STEP 7. Wiring harness check from C-43 sonar • Check the communication line for open circuit or short circuit. Q: Is the check result normal? YES : Go to Step 8. NO : Repair the wiring harness. STEP 8. Retest the system Q: Is the check result normal? YES : The diagnosis is complete. NO : Replace the corner sensor/back sensor- ACA00886 AL Connector: C-317 |