B1A25

B1A25-INVALID KEY





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

Theory of Operation

When a key is inserted in the ignition switch and is turned to the Run/Start position, the Wireless Control Module (WCM) performs a self-test and re-synchronization routine. During this routine, the WCM interrogates the key, performing various validity and performance tests.

- When Monitored:
When the key is inserted into the ignition switch and turned to the Run/Start position.

- Set Condition:
When the Wireless Control Module (WCM) does not receive a transponder response after eight consecutive transponder read attempts within two seconds.





Always perform the Wireless Control Module Pre-Diagnostic procedure before proceeding. . Wireless Control Module (WCM) Verification Test

1. DETERMINING IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT

NOTE: 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 NCG 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. With the scan tool, read and record the WCM DTCs.
2. With the scan tool, erase the WCM DTCs

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

3. Turn the ignition off.
4. Wait 10 seconds.
5. Turn the ignition on.
6. With the scan tool, read the WCM DTCs.

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

Yes

- Go To 2

No

- Go To 6

2. CHECKING FOR MULTIPLE KEYS

Are there multiple vehicle ignition keys available?

Yes

- Go To 3

No

- 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.

1. With the scan tool, erase the WCM DTCs.
2. Turn the ignition off.
3. Wait 10 seconds.
4. Turn the ignition on
5. With the scan tool, read the WCM DTCs.

Is the DTC present for all ignition keys?

Yes

- Replace and program the Wireless Control Module.NOTE: If this vehicle is equipped with a Steering Column Lock Module, it must be replaced along with the WCM.

- Perform the WIRELESS CONTROL MODULE (WCM) VERIFICATION TEST. . Wireless Control Module (WCM) Verification Test

No

- Replace the ignition key(s) that cause the DTC to set.
- Perform the WIRELESS CONTROL MODULE (WCM) VERIFICATION TEST. . Wireless Control Module (WCM) Verification Test

4. REPROGRAM KEY
1. Using the scan tool, attempt to reprogram the ignition key to the WCM.
2. Using the scan tool, erase the WCM DTCs.
3. Wait 10 seconds.
4. Turn the ignition on.
5. Using the scan tool, read the WCM DTCs.

Does the DTC set again?

Yes

- Go To 5

No

- Test complete.

5. PROGRAM NEW IGNITION KEY
1. Replace the ignition key with a new key.
2. Using the scan tool, program the new ignition key to the WCM.
3. Using the scan tool, erase the WCM DTCs.
4. Turn the ignition off.
5. Wait 10 seconds.
6. Turn the ignition on.
7. Using the scan tool, read the WCM DTCs.

Does the DTC set again?

Yes

- Replace and program the Wireless Control Module.NOTE: If this vehicle is equipped with a Steering Column Lock Module, it must be replaced along with the WCM.

- Perform the WIRELESS CONTROL MODULE (WCM) VERIFICATION TEST. . Wireless Control Module (WCM) Verification Test

No

- Test complete.

6. INTERMITTENT WIRING HARNESS PROBLEM
1. 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.
- Perform any Technical Service Bulletins (TSB) that may apply.

Were any problems found?

Yes

- Repair wiring harness/connectors as necessary.
- Perform the WIRELESS CONTROL MODULE (WCM) VERIFICATION TEST. . Wireless Control Module (WCM) Verification Test

No

- Test Complete.