DTC P1621 [L3]

BME010201600W04

DTC P1621

Code word does 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
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Perform code word reprogram procedure, go to next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
Then go to next step.
2
VERIFY TROUBLESHOOTING OF DTC P1621 COMPLETED
• Clear DTC from memory using WDS or equivalent.
• Perform KOEO self-test.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
3
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.