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• When Monitored: • Set Condition: Possible Causes (X793) MICROPHONE FEED CIRCUIT OPEN (X793) MICROPHONE FEED CIRCUIT SHORT TO VOLTAGE INSIDE REAR VIEW MIRROR HANDS FREE MODULE Diagnostic Test 1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTC’s. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per Attempt to make a phone call with the system. With the scan tool, read the active DTC’s. Does the scan tool display this DTC as active? Yes >> Go To 2 No >> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con- nectors. Look for broken, bent, pushed out, or corroded terminals. 2. (X793) MICROPHONE FEED CIRCUIT OPEN Turn the ignition off. Disconnect the Hands Free Module harness connector. Disconnect the Inside Rear View 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 8T - 32 NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS LX |