Mitsubishi Motors Service Manual

2018 / ECLIPSE CROSS / EC - Workshop Manual

42 -BODY > 42B-KEYLESS OPERATION SYSTEM (KOS) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > B1A25 Key Registered to Another Vehicle

Code No.B1A25 Transponder ID unmatched

caution

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

DIAGNOSTIC FUNCTION

The KOS&OSS-ECU sets diagnosis code No. B1A25 when the received key ID is different from the registered one or the engine switch cannot communicate with the key correctly.

JUDGEMENT CRITERIA

KOS&OSS-ECU determines that the abnormality is present, if the key ID does not match the one registered in the KOS&OSS-ECU.

PROBABLE CAUSES

Malfunction of the keyless operation key
Malfunction of KOS&OSS-ECU
Key is registered to another vehicle

DIAGNOSIS PROCEDURE

STEP 1. All of the registered keyless operation key should allow the engine switch to be turned all positions.

(1) Prepare all of the registered keyless operation key.

(2) Turn off the power supply.

(3) With keeping your foot on the brake pedal, let the keyless operation key touch the engine switch.

(4) Check whether the indicator of engine switch illuminates in green.

(5) Press the engine switch three times to turn the power supply mode to "ACC", "ON", "OFF".

(6) Repeat the same procedure (3) to (5) for the other keyless operation key. Check for all of the registered keyless operation key.

Is the check result normal?

With all the keyless operation keys touching the engine switch, the indicator illuminates in green. : Check if the diagnosis code is set. If the diagnosis code is erased, the diagnosis is complete. If not, go to Step 3

The indicator does not illuminate in green by letting one of the keyless operation keys touch the engine switch, or by letting all the keyless operation keys touch the engine switch. : Check whether diagnosis code B2352 is set. If diagnosis code B2352 is set, go to the troubleshooting (Refer to

). Repeat Step 1. If diagnosis code B2352 is not set, go to Step 2

STEP 2. Register the keyless operation key which cannot activate the engine switch again.

Is the check result normal?

All of the keyless operation key can be registered again : Go to Step 3

All of the keyless operation key cannot be registered again : The keyless operation key, which cannot be registered, is defective. Put it aside. Go to Step 3

STEP 3. It should allow the engine switch to be turned all positions, after register all of the keyless operation key again.

(1) Remove the batteries from all of the keyless operation keys (Refer to

(2) Turn off the power supply.

(3) With keeping your foot on the brake pedal, let the keyless operation key touch the engine switch.

(4) Check whether the indicator of engine switch illuminates in green.

(5) Press the engine switch three times to turn the power supply mode to "ACC", "ON", "OFF".

(6) Repeat the same procedure (3) to (5) for the other keyless operation key. Check for all of the registered keyless operation key.

Is the check result normal?

The indicator does not illuminate in green by letting one of the keyless operation keys touch the engine switch, or by letting all the keyless operation keys touch the engine switch. : Go to Step 4

STEP 4. Replace the keyless operation key which cannot activate the engine switch with a new one

(1) Replace the keyless operation key which cannot activate the engine switch with a new one.

note	Exclude the keyless operation key which you put aside on Step 2.

(2) Register a new keyless operation key (Refer to

(3) Check that all of the registered keyless operation key allow the engine switch to be turned all positions.

(1) Turn off the power supply.

(2) With keeping your foot on the brake pedal, let the keyless operation key touch the engine switch.

(3) Check whether the indicator of engine switch illuminates in green.

(4) Press the engine switch three times to turn the power supply mode to "ACC", "ON", "OFF".

(5) Repeat the same procedure (3) to (5) for the other keyless operation key. Check for all of the registered keyless operation key.

Is the check result normal?

The indicator does not illuminate in green by letting one of the keyless operation keys touch the engine switch, or by letting all the keyless operation keys touch the engine switch. : Go to Step 5

STEP 5. Check whether the diagnosis code is set again.

(1) Erase the diagnosis code.

(2) Check if the diagnosis code is set.

Is the diagnosis code set?

Replace KOS&OSS-ECU and register the ID codes (Refer to

The diagnosis is complete.