Diagnostic Test

CHECK FOR AN INTERMITTENT CONDITION
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.
2. With the scan tool, record and erase the WIN DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. With the scan tool, read the active WIN DTCs.
  Does the scan tool display active: B1A35-UNIDENTIFIED KEY COMMUNICATION ERROR
  
  Yes
  - If the engine does not crank, Go To 2
  - If the engine does crank, Go To 3
  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 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

VERIFY THE WIN HAS BEEN PROPERLY INITIALIZED
1. Using the scan tool, read the Number of Key/Fobs Programmed under Data Display.
  Does the scan tool show 2 or more Key/Fobs Programmed?
  
  Yes
  - Go to step 4
  No
  - With the scan tool, program 2 FOBIKS. See DTC-Based Diagnostics/NODE, Wireless Ignition (WIN) - Standard Procedure and perform the WIN VERIFICATION TEST.
CHECK OPERATION OF THE FOBIK IN USE
NOTE: Verify the FOBIK in use is the FOBIK causing the DTC to set.
1. Replace the FOBIK currently in use.
2. Using the scan tool, program the new FOBIK to the WIN.
3. Use the scan tool and erase all codes in the WIN.
4. Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
5. Wait one minute, and read the active codes.
  Does the scan tool display: B1A35-UNIDENTIFIED KEY COMMUNICATION ERROR as active?
  
  Yes
  - Replace the Wireless Ignition Node in accordance with the Service Information. Refer to Electrical/Electronic Control Modules/RECEIVER, Wireless Ignition Node - Removal .
    NOTE: Technicians must use the scan tool to perform the WIN Programming procedure after a module replacement.
  - Perform the WIN VERIFICATION TEST. See DTC-Based Diagnostics/NODE, Wireless Ignition (WIN) - Standard Procedure .
  No
  - Repair is complete.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .