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• When Monitored: • Set Condition: Possible Causes (X712) MICROPHONE 1 IN (+) CIRCUIT OPEN (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN (X792) MICROPHONE IN (-) CIRCUIT OPEN (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO GROUND (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO VOLTAGE (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TOGETHER 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. PM NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS 8T - 37 |