| Mazda P1621 | Immobilizer system code word does not match |
|---|---|
|
DETECTION CONDITION
|
• Cord word stored in instrument cluster and PCM does not to match.
|
|
POSSIBLE CAUSE
|
• Immobilizer system malfunction
• PCM malfunction
|
Diagnostic procedure
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
|
1
|
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
|
Yes
|
Go to the next step.
|
|
No
|
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
|
||
|
2
|
VERIFY REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
VERIFY STORED DTC IN INSTRUMENT CLUSTER
• Turn the engine switch to the ON position (Engine off).
• Verify stored DTC in instrument cluster.
• Are DTCs stored?
|
Yes
|
Go to appropriate DTC inspection.
|
|
No
|
Go to the next step.
|
||
|
4
|
VERIFY THAT DTC P1621 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.
|
|
No
|
Go to the next step.
|
||
|
5
|
VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Troubleshooting completed.
|
||