Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THAT THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE: An external Radio-Frequency Identification (RFID) key (and/or pass/radio key), such as one used to gain access to a 24 hour gym, can cause this DTC to set and create a no start condition. Inspect the customer's key chain for any type of RFID key. If one is not found, question the customer to see if a spare key chain has this RFID key on it or if it was removed from the original key chain before the vehicle was released for service. If a RFID key is present, remove the ignition key from the vehicle and remove the RFID key from the key chain. For GPEC equipped vehicles, disconnect the battery and wait a minimum of 5 minutes, reconnect and attempt to start the vehicle. For NGC equipped vehicles, turn the ignition on a minimum for one hour, and then attempt to start the vehicle. If the vehicle does not start, continue with the diagnostic test.
1. Turn the ignition on.
  NOTE:
  Before continuing, review and check for the following:
  - Review the repair history of the vehicle.
  - Make sure that the vehicle has the correct PCM and WIN installed by verifying the part numbers.
  - With the scan tool, ensure that the PCM and WIN are programmed correctly. Compare the PCM VIN to the WIN VIN and ensure the two VINs match.
2. With the scan tool, record and erase the DTCs.
3. Perform 2 ignition cycles, leaving the ignition switch on for a minimum of one minute per cycle.
4. With the scan tool, read the active DTCs.
  Does the scan tool display; B1A25-INVALID KEY as active?
  
  Yes
  - If the engine does not crank, Go To step 2
  - If the engine does crank, Go To 2 and answer "Yes" to the question in step 2.
  No
  - Perform the WIN INTERMITTENT TEST. See DTC-Based Diagnostics/NODE, Wireless Ignition (WIN) - Standard Procedure .

ENGINE DOES NOT CRANK

NOTE: When diagnosing any WIN system concern, all the FOBIKS should be present

If this vehicle does not crank, use the table below to determine if the key is functional or not. With the scan tool under Data Display, Bussed Outputs, put the key in each position and check the "Ignition Status". Then with the key in the Run position, check "Valid Skim Key" and "SCREEM Status" reported by the WIN (or WCM). Compare all six readings with the "Good Key" column.

BUSSED OUTPUTS	-	-	-	-
Ignition Status	Good Key	Bad Key (Failed)	Wrong Key	New Key (Blank)
Ignition Position = Lock	-------------- or Lock	--------------	--------------	-------------- or Lock
Ignition Position = ACC.	Off/ACC.	--------------	--------------	Off/ACC.
Ignition Position = Run Or ON	Run	Lock	Lock	Run
Ignition Position = Start Engine Off - Trans. in Gear	Start or Run	Lock	Lock	Run
SKREEM Status	Normal Status	Service SKREEM	Invalid Key	Key Not Programmed
Valid Skim Key	Yes/True	No/False	No/False	No/False
-	-	-	-	-
Trouble Code (DTC)	-	B2229, B1A35	B1A6C, B1A25	B1A24