General Information

Engine Control
P0605 Internal Control Module Read Only Memory(ROM) Error - General Information

Component Location





General Description

PCM malfunctions are 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.

DTC Description

If the RAM in the PCM has errors or the CPU software version does not match the main CPU or real checksum does not match with the memory checksum, the PCM sets a P0605 DTC.

DTC Detecting Condition