DTC P1621 [MZR-CD (RF Turbo)]

BME010201600W11

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 vehicle is not repaired, go to next step.
No
Go to next step.
2
VERIFY DTC P1621 DETECTED AGAIN
• Clear DTC from PCM memory using WDS or equivalent.
• Start engine.
• Is same DTC present?
Yes
Perform code word reprogram procedure.
No
Go to next step.
3
VERIFY TROUBLESHOOTING OF DTC P1603 COMPLETED
• Clear DTC from PCM memory using WDS or equivalent.
• Start engine.
• Is same DTC present?
Yes
Replace PCM, go to next step.
No
Go to next step.
4
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.