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HOMESERVICE MANUALSJEEP2008GRAND CHEROKEE SRT-8REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSVEHICLE THEFT SECURITY SYSTEM - ELECTRICAL DIAGNOSTICSVEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1A2E-KEY 5 COMMUNICATION ERRORDIAGNOSTIC TEST
2008 Jeep Grand Cherokee SRT-8

Diagnostic Test

2008 Jeep Grand Cherokee SRT-8SECTION Diagnostic Test
  1. DETERMINING IF DTC IS CURRENT 

    With the scan tool, read and record the WIN DTCs.

    With the scan tool, erase the WIN DTCs.

    NOTE: Perform the following test several times to make sure the DTC is current.

    Turn the ignition off.

    Wait 10 seconds.

    Turn the ignition on.

    With the scan tool, read the WIN DTCs.

    Does the scan tool display the DTC that was previously erased? 

    Yes 

    1. Go to  2.

    No 

    1. Go to  6.
  2. CHECKING FOR MULTIPLE KEYS 

    Are there multiple vehicle ignition keys available? 

    Yes 

    1. Go to  3.

    No 

    1. Go to  4.
  3. MULTIPLE KEY OPERATION 
    NOTE: Perform the following steps using one of the vehicle ignition keys. When finished, repeat the procedure using each of the other vehicle keys, one at a time.

    With the scan tool, erase the WIN DTCs.

    Turn the ignition off.

    Wait 10 seconds.

    Turn the ignition on.

    With the scan tool, read the WIN DTCs.

    Is the DTC present for all ignition keys? 

    Yes 

    1. Replace and program the Wireless Ignition Node in accordance with the Service Information.
      NOTE: If this vehicle is equipped with a Steering Column Lock Module, it must be replaced along with the WIN.
    2. Perform WIN VERIFICATION TEST .

    No 

    1. Replace the ignition key(s) that cause the WIN DTC.
    2. Perform WIN VERIFICATION TEST .
  4. REPROGRAM KEY 

    With the scan tool, attempt to reprogram the ignition key to the WIN.

    With the scan tool, erase the WIN DTCs.

    Wait 10 seconds.

    Turn the ignition on.

    With the scan tool, read the WIN DTCs.

    Does the DTC set again? 

    Yes 

    1. Go to  5.

    No 

    1. Test complete.
  5. PROGRAM NEW IGNITION KEY 

    Replace the ignition key with a new key.

    With the scan tool, program the new ignition key to the WIN.

    With the scan tool, erase the WIN DTCs.

    Turn the ignition off.

    Wait 10 seconds.

    Turn the ignition on.

    With the scan tool, read the WIN DTCs.

    Does the DTC set again? 

    Yes 

    1. Replace and program the Wireless Ignition Node in accordance with the Service Information.
      NOTE: If this vehicle is equipped with a Steering Column Lock Module, it must be replaced along with the WIN.
    2. Perform WIN VERIFICATION TEST .

    No 

    1. Test complete.
  6. INTERMITTENT WIRING HARNESS PROBLEM 

    Turn the ignition off.

    NOTE: Check the following items:
    • Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
    • Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
    • Refer to any Technical Service Bulletins (TSB) that may apply.

    Were any problems found? 

    Yes 

    1. Repair wiring harness/connectors as necessary.
    2. Perform WIN VERIFICATION TEST .

    No 

    1. Test Complete.
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.