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HOMESERVICE MANUALSJEEP2007GRAND CHEROKEE OVERLAND, 5.7 2, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESNAVIGATION SYSTEM & TELECOMMUNICATION SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB145A-TELEMATICS MIRROR CONTROL CIRCUIT HIGHDIAGNOSTIC TEST
2007 Jeep Grand Cherokee Overland, 5.7 2, RWD

Diagnostic Test

2007 Jeep Grand Cherokee Overland, 5.7 2, RWDSECTION Diagnostic Test
  1. 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 cycle.

    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 

    1. Go to step  2).

    No 

    1. If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. 2) (X793) MICROPHONE FEED CIRCUIT SHORT TO VOLTAGE 
    Fig 1: Checking Microphone Feed Circuit
    GC0016202Courtesy of CHRYSLER LLC

    Turn the ignition on.

    Measure the voltage of the (X793) Microphone Feed circuit.

    Is the voltage above 1.0 volt? 

    Yes 

    1. Repair the (X793) Microphone Feed circuit for short to voltage.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Go to step  3).
  3. 3) INSIDE REAR VIEW MIRROR 

    Replace the Inside Rear View Mirror in accordance with the service information.

    Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.

    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 

    1. Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Repair is complete.
    2. Perform BODY VERIFICATION TEST - VER 1 .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.