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Home >> Jeep >> 2009 >> Grand Cherokee Laredo, 3.0 M, AWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0675 To P2002 - Diesel >> P1685-Skim System >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR WIN COMMUNICATION AND DTCS 
    1. Ignition on, engine not running.
    2. With the scan tool, check for proper communication and active DTCs in the WIN.

      Are any WIN communication problems or DTCs present?

      Yes 

      No 

      • Go to step  2
  2. CHECK FOR ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, clear all ECM DTCs.
    3. Turn the ignition on and off several times pausing 10 seconds between key cycles.
    4. With the scan tool, select View DTCs in the ECM.

      Is the status Active for this DTC?

      Yes 

      • Go to  3

      No 

  3. REPLACE THE WIN AND RETEST 
    1. Replace and program the Wireless Ignition Node (WIN) in accordance with the Service Information.
    2. Turn the ignition on.
    3. With the scan tool, clear all ECM DTCs.
    4. Turn the ignition on and off several times pausing 10 seconds between key cycles.
    5. With the scan tool, select View DTCs in the ECM.

      Is the status Active for this DTC?

      Yes 

      No 

      • Test complete.