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HOMESERVICE MANUALSJEEP2008COMMANDER LIMITED, 4.7 N, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATSPOWER SEAT SYSTEM - ELECTRICAL DIAGNOSTICSPOWER SEATS - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1D63-POWER SEAT SWITCH OPENDIAGNOSTIC TEST
2008 Jeep Commander Limited, 4.7 N, RWD

Diagnostic Test

2008 Jeep Commander Limited, 4.7 N, RWDSECTION Diagnostic Test
  1. TEST FOR INTERMITTENT CONDITION 

    Turn the ignition on.

    With the scan tool, record and erase DTC's

    Press the Seat Switch in all directions several times.

    Wait one minute.

    With the scan tool, read DTC's.

    Does the scan tool display B1D63-POWER SEAT SWITCH OPEN? 

    Yes 

    1. Go To  2.

    No 

    1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
    2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
  2. CHECK THE (P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT RESISTANCE 
    Fig 1: Measuring Resistance Between (P239) Driver Seat Rear Vertical/Horizontal Switch MUX Circuit And (P599) Driver Seat Switch MUX Return Circuit In C4 Connector
    GC0016342Courtesy of CHRYSLER LLC

    Disconnect the Memory Seat Module C4 connector.

    NOTE: Check connectors - Clean and repair as necessary.

    Measure the resistance between the (P239) Driver Seat Rear Vertical/Horizontal Switch MUX circuit and the (P599) Driver Seat Switch MUX Return circuit in the C4 connector.

    Is the resistance 47.0 ohms + or - 1.0? 

    Yes 

    1. Go To  3.

    No 

    1. Go To  5.
  3. CHECK THE (P339) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT RESISTANCE 
    Fig 2: Measuring Resistance Between (P339) Driver Seat Front Vertical/Recliner Switch MUX Circuit And (P599) Driver Seat Switch MUX Return Circuit In C4 Connector
    GC0016344Courtesy of CHRYSLER LLC

    Measure the resistance between the (P339) Driver Seat Front Vertical/Recliner Switch MUX circuit and the (P599) Driver Seat Switch MUX Return circuit in the C4 connector.

    Is the resistance 47.0 ohms + or - 1.0? 

    Yes 

    1. Replace the Memory Seat Module.
    2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .

    No 

    1. Go To  4.
  4. CHECK THE (P339) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX WIRE RESISTANCE 
    Fig 3: Measuring Resistance Of (P339) Driver Seat Front Vertical/Recliner Switch MUX Circuit Between C4 Connector And Driver Seat Switch Connector
    GC0016347Courtesy of CHRYSLER LLC

    Disconnect the Driver Seat Switch.

    NOTE: Check connectors - Clean and repair as necessary.

    Measure the resistance of the (P339) Driver Seat Front Vertical/Recliner Switch MUX circuit between the C4 connector and the Driver Seat Switch connector.

    Is the resistance below 1.0 ohm? 

    Yes 

    1. Replace the Driver Seat Switch.
    2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .

    No 

    1. Repair the (P339) Driver Seat Front Vertical/Recliner Switch MUX circuit for an open.
    2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
  5. CHECK THE (P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX WIRE RESISTANCE 
    Fig 4: Measuring Resistance Of (P239) Driver Seat Rear Vertical/Horizontal Switch MUX Circuit Between C4 Connector And Driver Seat Switch Connector
    GC0016346Courtesy of CHRYSLER LLC

    Measure the resistance of the (P239) Driver Seat Rear Vertical/Horizontal Switch MUX circuit between the C4 connector and the Driver Seat Switch connector.

    Is the resistance below 1.0 ohm? 

    Yes 

    1. Go To  6.

    No 

    1. Repair the (P239) Driver Seat Rear Vertical/Horizontal Switch MUX circuit for an open.
    2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
  6. CHECK THE (P599) DRIVER SEAT SWITCH MUX RETURN WIRE RESISTANCE 
    Fig 5: Measuring Resistance Of (P599) Driver Seat Switch MUX Return Circuit Between C4 Connector And Driver Seat Switch Connector
    GC0016345Courtesy of CHRYSLER LLC

    Measure the resistance of the (P599) Driver Seat Switch MUX Return circuit between the C4 connector and the Driver Seat Switch connector.

    Is the resistance below 1.0 ohm? 

    Yes 

    1. Replace the Driver Seat Switch.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Repair the (P599) Driver Seat Switch MUX Return circuit for an open.
    2. Perform POWER SEAT SYSTEM 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.