B1A35

B1A35-UNIDENTIFIED KEY COMMUNICATION ERROR

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

Theory of Operation

Whenever a Fob-in-Key (FOBIK) is inserted in the Wireless Ignition Node (WIN) basestation, 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 FOBIK ID is received by the WIN.

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

- Set Condition:
This DTC sets if a FOBIK is inserted in the WIN basestation but the WIN does not receive or is unable to read an ID from the FOBIK. This DTC will remain active until a valid, programmed FOBIK is inserted in the basestation and rotated through the ON position.





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

1. DETERMINE ACTIVE OR STORED DIAGNOSTIC TROUBLE CODE (DTC)

Is the DTC active or stored?

WIN - ACTIVE DTC

- Go To 2

WIN - STORED DTC

- Perform the WIN INTERMITTENT TEST. Wireless Ignition Node (WIN) Intermittent Condition Test

2. VERIFY THE WIRELESS IGNITION NODE (WIN) HAS BEEN PROPERLY INITIALIZED

NOTE: When diagnosing any WIN concern, all FOBIKs must be present

1. With 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 3

No

- Program 2 FOBIKs, then perform the WIN VERIFICATION TEST.Wireless Ignition Node (WIN) Verification Test

3. 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 a 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 active codes.

Does the scan tool display this DTC as active?

Yes

- NOTE: Technicians must use the scan tool to perform the WIN Programming procedure after a module replacement.
- Replace the Wireless Ignition Node.
- Perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test

No

- Repair is complete.
- Perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test