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• When Monitored: • Set Condition: Possible Causes (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO (X835) SENSOR GROUND (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO GROUND AUTOMATIC DAY/NIGHT MIRROR HANDS FREE MODULE Diagnostic Test 1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, erase the HFM DTCs. Attempt to make a phone call using the system. With the scan tool, read the HFM DTCs. Did this DTC reset? Yes >> Go To 2 No >> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con- 2. CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL Turn the ignition off. Disconnect the Automatic Day/Night Mirror C2 harness connector. Turn the ignition on. With the scan tool, monitor the VR Phone Switch voltage. Is the voltage above 4.7 volts? Yes >> Replace the Automatic Day/Night Mirror in accordance with the service information. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL No >> Go To 3 8T - 70 NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS KJ |