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HANDS FREE ECU CHASSIS ELECTRICAL 54A-261 • The hands free-ECU may be defective. • The steering wheel remote control switch may be defective. • Damaged harness wires and connectors DIAGNOSIS PROCEDURE STEP 1. Check the diagnosis mode <Vehicles with 1CD audio> or <Vehicles with display audio>.) Q: Is the check result normal? YES : Go to Step 2. NO : Perform Inspection Procedure 5 STEP 2. Operation check of the steering wheel Q: Is the check result normal? YES : Go to Step 3. NO : Troubleshoot the steering wheel remote STEP 3. Check the steering wheel remote control ) Q: Is the check result normal? YES : Go to Step 4. NO : Replace the steering wheel remote control STEP 4. Temporarily replace the hands free-ECU, Q: Is the check result normal? YES : Replace the hands free-ECU. NO : Replace the radio and CD player. Inspection Procedure 5: DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not CAUTION Before replacing the hands free-ECU or radio and COMMENTS ON TROUBLE SYMPTOM If the diagnosis mode cannot be made an entry, the PROBABLE CAUSES • The hands free-ECU may be defective. • The radio and CD player may be defective. • Damaged harness wires and connectors DIAGNOSIS PROCEDURE STEP 1. Check the radio and CD player Q: Is the check result normal? YES : Go to Step 2. NO : Troubleshoot the radio and CD player. .) STEP 2. Check of short to power supply, short to Q: Is the check result normal? YES : Go to Step 3. NO : Repair the connector(s) or wiring harness. |