Wireless Control Module

Code NO.B1A08 Keyless/KOS key1 performance
Code NO.B1A09 Keyless/KOS key2 performance
Code NO.B1AOA Keyless/KOS key3 performance
Code NO.B1AOB Keyless/KOS key4 performance
Code NO.B1AOC Keyless key 5 performance
Code NO.B1AOD Keyless key 6 performance
Code NO.B1AOE Keyless key 7 performance
Code NO.B1AOF Keyless key 8 performance

CAUTION: When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION
The door locking/unlocking code is automatically updated every time the doors are locked (rolling code). WCM stores diagnostic trouble code No. B1A08, B1A09, B1AOA, B1AOB, B1AOC, B1AOD, B1AOE, or B1AOF when it receives wrong signal (rolling code out of synchronization) from the transmitter.

JUDGEMENT CRITERIA
- B1A08: WCM determines that the abnormality is present when the rolling code received from the transmitter 1 (the first transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1A09: WCM determines that the abnormality is present when the rolling code received from the transmitter 2 (the second transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOA: WCM determines that the abnormality is present when the rolling code received from the transmitter 3 (the third transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOB: WCM determines that the abnormality is present when the rolling code received from the transmitter 4 (the fourth transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOC: WCM determines that the abnormality is present when the rolling code received from the transmitter 5 (the fifth transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOD: WCM determines that the abnormality is present when the rolling code received from the transmitter 6 (the sixth transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOE: WCM determines that the abnormality is present when the rolling code received from the transmitter 7 (the seventh transmitter registered in WCM) greatly differs from the rolling code stored in WCM.
- B1AOF: WCM determines that the abnormality is present when the rolling code received from the transmitter 8 (the eighth transmitter registered in WCM) greatly differs from the rolling code stored in WCM.

PROBABLE CAUSES
- Rolling code out of synchronization.
- Malfunction of the transmitter.
- Malfunction of the WCM.

DIAGNOSTIC PROCEDURE

STEP 1. Synchronize the rolling code and recheck the diagnostic trouble code.
1. Synchronize the rolling code. Use either way to synchronize the rolling code:
- Push the transmitter switches twice or more.
- Resister the keyless entry secret code of.

NOTE: *: Name of the signals to be registered.

2. Recheck if the diagnostic trouble code is set.
- Erase the diagnostic trouble code.
- Push the lock switch or unlock switch of transmitter.
- Check if the diagnostic trouble code is set.

Q: Is the diagnostic trouble code set?

YES : Go to Step 2.

NO : The procedure is complete.

STEP 2. Check whether the diagnostic trouble code is reset.
Replace the transmitter with a new one, register the encrypted code and the keyless entry secret code and recheck if the diagnostic trouble code is set.
1. Erase the diagnostic trouble code.
2. Push the lock switch or unlock switch of transmitter.
3. Check if the diagnostic trouble code is set.

Q: Is the diagnostic trouble code set?

YES : Replace WCM and register the ID codes.

NO : The procedure is complete.