DTC P1621 [MZR-CD (RF Turbo)]

BME010200102290

DTC P1621

Code words do not match after engine cranking

DETECTION CONDITION

• Code words stored in PCM and immobilizer unit do not match.

POSSIBLE CAUSE

• Immobilizer system reprogram procedure (code word) was not performed correctly after replacing immobilizer unit or PCM

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any repair information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
VERIFY DTC P1621 DETECTED AGAIN
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Perform the code word reprogram procedure.
No
Go to the next step.
3
VERIFY TROUBLESHOOTING OF DTC P1603 COMPLETED
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, go to the next step.
No
Go to the next step.
4
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.