A malfunction is detected by using a checksum technique for verifying data. The digital data is composed of zeros and ones. A checksum is the total of all ones in a string of data. By comparing the checksum value with a stored value, a malfunction can be detected.
Checking ECM under detecting condition, if internal error is detected, ECM sets P0606. And MIL(Malfunction Indication Lamp) turns on.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Check ECM internal error | 1. Faulty ECM |
Enable Conditions |
•
7V < Battery voltage < 20V | |
Threshold value |
•
ECM internal error (A/D unit error) | |
Diagnosis Time |
•
Continuous | |
MIL On Condition |
•
1 driving cycle |
