PCM decide that error is detected, when checksum is worng by PCM internal operation.
PCM watch that PCM checks error of each data by each data checksum for PCM internal operation value.
This code is set when PCM detected checksum error by internal operation.
( Checksum error is detected when PCM's ROM or DATA is changed by reprogram illegally.)
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
ROM checksum error |
•
ROM data reprogram illegally
•
PCM |
Enable Conditions |
•
Ignition "ON"
•
Battery voltage > 10V | |
Threshold value |
•
Checksum error or PCM fault | |
Detecting Time |
•
1event | |
Fail safe |
•
Locked into 4th gear |
