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 PCM under detecting condition, if internal error is detected, PCM sets P0606. And MIL(Malfunction Indication Lamp) turns on.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Check PCM internal error | ● Faulty PCM |
Enable Conditions | ● 7V < Battery voltage < 20V | |
Threshold value | ● PCM internal error (A/D unit error) | |
Diagnosis Time | ● Continuous | |
MIL On Condition | ● 1 driving cycle |
