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HOMESERVICE MANUALSJEEP2008COMMANDER LIMITED, 4.7 N, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTNAVIGATION SYSTEM & TELECOMMUNICATION SYSTEM - ELECTRICAL DIAGNOSTICSNAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB14B8-MICROPHONE 2 CIRCUIT OPEN (RADIO)DIAGNOSTIC TEST
2008 Jeep Commander Limited, 4.7 N, RWD

Diagnostic Test

2008 Jeep Commander Limited, 4.7 N, RWDSECTION Diagnostic Test
  1. CHECK FOR ACTIVE DTC 

    Turn the ignition on.

    With the scan tool, record and erase DTCs.

    Turn the ignition off, wait 30 seconds then turn the ignition on.

    With the scan tool, read DTCs.

    Is the DTC active? 

    Yes 

    1. Go To  2.

    No 

    1. The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
    2. Perform BODY VERIFICATION TEST .
  2. INSIDE REARVIEW MIRROR 
    Fig 1: Rearview Mirror Harness Connector
    GC0059060Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Inside Rearview Mirror C2 harness connector.

    Connect a jumper wire from the (X722) Microphone 2 IN (+) circuit to ground.

    Turn the ignition on.

    With the scan tool, read the active DTC's.

    Does the scan tool display this DTC as active? 

    Yes 

    1. Go To  3.

    No 

    1. Replace the Inside Rearview Mirror in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .
  3. (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of (X722) Microphone 2 IN (+) Circuit Between Radio C1 Connector And Inside Rearview Mirror Connector
    GC0071510Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Radio C1 harness connector.

    Disconnect the Inside Rearview Mirror C2 harness connector.

    Measure the resistance of the (X722) Microphone 2 IN (+) circuit between the Radio C1 connector and the Inside Rearview Mirror C2 connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the Hands Free Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Repair the (X722) Microphone 2 IN (+) circuit for an open.
    2. Perform BODY VERIFICATION TEST .
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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.