DTC P1621, P1622, P1623, P1624 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]

id0102c4957300

DTC P1621

DTC P1622

DTC P1623

DTC P1624

Immobilizer code word does not match

Immobilizer ID does not match

Immobilizer code word/ID number write failure

Anti-theft system
DETECTION CONDITION
•  Cord word stored in immobilizer system and PCM does not to match.
•  ID number stored in immobilizer system and PCM does not to match.
POSSIBLE CAUSE
•  Immobilizer system malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
•  Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS been recorded?
Yes
go to the next step.
No
Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related service information availability.
•  Is any related service information available?
Yes
Perform repair or diagnosis according to the available service information.
If the vehicle is not repaired, go to the next step.
No
go to the next step.
3
VERIFY STORED DTC IN IMMOBILIZER SYSTEM
•  Turn the engine switch to the ON position (Engine off).
•  Verify stored DTC in IMMOBILIZER SYSTEM.
•  Are DTCs stored?
Yes
Go to appropriate DTC troubleshooting procedure.
(See DTC TABLE [IMMOBILIZER SYSTEM].)
No
go to the next step.
4
VERIFY THAT DTC P1621/P1622/P1623/P1624 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm-up to normal operating temperature.
•  Retrieve the DTC using the M-MDS.
•  Is the PENDING CODE same DTC present?
Yes
Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [WL-C, WE-C].)
(See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)
No
go to the next step.
5
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure“.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)
No
Troubleshooting completed.