Code No.B1A08 Keyless/KOS key1 performance
Code No.B1A09 Keyless/KOS key2 performance
Code No.B1A0A Keyless/KOS key3 performance
Code No.B1A0B Keyless/KOS key4 performance
Code No.B1A0C Keyless key 5 performance
Code No.B1A0D Keyless key 6 performance
Code No.B1A0E Keyless key 7 performance
Code No.B1A0F 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). ETACS-ECU stores diagnosis code No. B1A08, B1A09, B1A0A, B1A0B, B1A0C, B1A0D, B1A0E, or B1A0F when it receives wrong signal (rolling code out of synchronisation) from the transmitter.

JUDGMENT CRITERIA

B1A08: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 1 (the first transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A09: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 2 (the second transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0A: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 3 (the third transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0B: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 4 (the fourth transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0C: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 5 (the fifth transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0D: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 6 (the sixth transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0E: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 7 (the seventh transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.
B1A0F: ETACS-ECU determines that the abnormality is present when the rolling code received from the transmitter 8 (the eighth transmitter registered in ETACS-ECU) greatly differs from the rolling code stored in ETACS-ECU.

PROBABLE CAUSES

Rolling code out of synchronisation
Malfunction of the transmitter
Malfunction of the ETACS-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Synchronise the rolling code and recheck the diagnosis code.

(1)Synchronise the rolling code.

Push the lock switch or unlock switch of transmitter twice or more.
If the keyless entry system does not resume by the procedure above, register the key again (Refer to ).

(2)Recheck if the diagnosis code is set.
..... Push the lock switch or unlock switch of transmitter.
..... Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Go to Step 2.

The diagnosis is complete.

STEP 2. Check whether the diagnosis code is reset.

Replace the transmitter by which the diagnosis code is set with a new one, register the key (Refer to

.), and recheck if the diagnosis code is set.

(1)Push the lock switch or unlock switch of transmitter.

(2)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace ETACS-ECU and register the ID codes (Refer to

The diagnosis is complete.