Operation CHARM: Car repair manuals for everyone.
Hosted by mcallihan.com

B1A25






B1A25-INVALID KEY

For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

Theory of Operation

Whenever a Fob-Integrated-Key (FOBIK) is inserted in the Wireless Ignition Node (WIN) base station, the WIN performs a self test and resynchronization routine. During the routine, the WIN interrogates the FOBIK, performing various validity and performance tests. The repair of this fault condition relies on whether the ID of the FOBIK is recognized as valid in the WIN.

- When Monitored:
During interrogation, the FOBIK sends an LF signal to the WIN that includes the programmed FOBIK ID.

- Set Condition:
This DTC sets if the WIN receives an ID from the FOBIK that does not match any of the eight possible FOBIK IDs programmed in the WIN. This DTC will remain active until a valid, programmed FOBIK is inserted in the base station and rotated through the ON position.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Wireless Ignition Node (WIN) Pre-Diagnostic Procedure.

1. 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 five 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, make sure that the PCM and WIN are programmed correctly. Compare the PCM VIN to the WIN VIN and verify the two VINs match.

2. With the scan tool, record and erase the DTCs.
3. Perform two 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 2
- If the engine does crank, Go To 2 and answer "Yes" to the question in step 2.

No

- Perform the WIN INTERMITTENT TEST. Wireless Ignition Node Receiver - Removal
- Perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test.

No

- If the customer affirms that the FOBIK being used in this test is the correct one for this vehicle, use the scan tool and perform the "Program Ignition Key" routine. If the key fails, replace the key (FOBIK) and program using the scan tool.
- Perform the BODY VERIFICATION TEST.Body Verification Test.