DTC P1621 [AJ]

BME010201600204

DTC P1621

Code word does not match after engine cranking

DETECTION CONDITION

• Code word stored in PCM and immobilizer control module does not match

POSSIBLE CAUSE

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

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If 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.
• Turn the ignition switch off, then start engine.
• Is the same DTC present?
Yes
Perform code word reprogram procedure.
No
Go to the next step.
3
VERIFY TROUBLESHOOTING OF DTC P1621 COMPLETED
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Turn the ignition switch off, then start engine.
• Is the same DTC present?
Yes
Replace the PCM, then 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.