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• When Monitored: • Set Condition: Possible Causes (X793) MICROPHONE FEED CIRCUIT OPEN (X793) MICROPHONE FEED CIRCUIT SHORT TO VOLTAGE 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. (X793) MICROPHONE FEED CIRCUIT OPEN Turn the ignition off. Disconnect the Hands Free Module C1 harness connector. Disconnect the Automatic Day/Night Mirror C2 harness connector. Measure the resistance of the (X793) Microphone Feed circuit between Is the resistance below 5.0 ohms? Yes >> Go To 3 No >> Repair the (X793) Microphone Feed circuit for an open. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE). 8T - 34 NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS KJ |