| Mazda P1639 | Vehicle identification block corrupted or not programmed |
|---|---|
|
DETECTION CONDITION
|
• Vehicle identification block not programmed – program vehicle identification block
• Vehicle identification checksum error – re-program vehicle identification
|
|
POSSIBLE CAUSE
|
• No configuration data in the PCM.
• PCM internal EEPROM is damaged.
|
Diagnostic procedure
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
|
1
|
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service bulletins and/or on-line repair information availability.
• Is any repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
• If vehicle is not repaired, go to the next step.
|
|
No
|
Perform the “PCM CONFIGURATION”, then go to the next step.
|
||
|
2
|
VERIFY DTC P1639 DETECTED AGAIN
• Clear the DTC from the memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
|
Yes
|
Replace the PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
DTC troubleshooting completed.
|
||