Inspection Procedure 2: The keyless operation key cannot be registered using the scan tool: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Sufficiently insert the keyless operation key into the key slot, and then check the trouble symptom.
Insert the keyless operation key into the key slot again, and check whether the keyless operation key can be registered.

Q: Is the check result normal?
1. YES: The procedure is complete.
2. NO: Go to Step 2
STEP 2. Interference check of keyless operation key when it is inserted in the key slot
Check if there is another keyless operation key nearby or anything that interferes with the communication (magnets or objects that generate radio waves such as air-cleaning devices with a power plug).

Q: Are there other keys or anything that interferes with the communication?
1. YES: Move away or remove other keyless operation keys or anything that interferes with the communication. Then, go to Step 3.
2. NO: Go to Step 4
STEP 3. Retest the system
Check that the keyless operation key can be registered.

Q: Is the check result normal?
1. YES: The procedure is complete.
2. NO: Go to Step 4
STEP 4. Using scan tool (M.U.T.-III), read the diagnostic trouble code.
Check whether the DTC is stored in the KOS-ECU.

CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the power supply mode of the engine switch to ON.
3. Check if DTC is stored.
4. Turn the power supply mode of the engine switch to OFF.
Q: Is the DTC stored?
1. YES: Refer to DIAGNOSTIC TROUBLE CODE CHART .
2. NO: Go to Step 5.
STEP 5. Using scan tool (M.U.T.-III), read the other system diagnostic trouble code.
Check whether the DTC is stored in the OSS-ECU.

CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the power supply mode of the engine switch to ON.
3. Check if DTC is stored.
4. Turn the power supply mode of the engine switch to OFF.
Q: Is the DTC stored?
1. YES: Refer to DIAGNOSTIC TROUBLE CODE CHART .
2. NO: Go to Step 6.
STEP 6. Check which keyless operation key cannot be registered.
Q: Can any one of the keyless operation keys be registered?
1. YES (Only some keys): Replace the key that cannot be registered and register the ID codes (Refer to ON-VEHICLE SERVICE < KOS-ECU > ). After registering the ID codes, go to Step 8.
2. NO (All keys): Go to Step 7
STEP 7. Retest the system
Check the scan tool (M.U.T.-III) screen when the key was not able to be registered.

Q: Is the error message of scan tool (M.U.T.-III) screen "Abnormality in key"?
1. YES (Abnormality in key): Carry out diagnostic trouble code B1A25: Key ID unmatched (Refer to DIAGNOSTIC TROUBLE CODE CHART ). Then, go to Step 8.
2. NO (ECU internal error): Replace KOS-ECU and register the ID codes (Refer to ON-VEHICLE SERVICE < KOS-ECU > ).
STEP 8. Retest the system
Check that the keyless operation key can be registered.

Q: Is the check result normal?
1. YES: The procedure is complete.
2. NO: Go to Step 9
STEP 9. Check for diagnostic trouble code.
1. Turn the power supply mode of the engine switch from OFF to ON.
2. Check if DTC is stored.
3. Turn the power supply mode of the engine switch from ON to OFF.
Q: Is the DTC stored?
1. YES: Replace the KOS-ECU and register the ID codes (Refer to ON-VEHICLE SERVICE < KOS-ECU > ).
2. NO: The procedure is complete.