General Information

Automatic Transaxle

P0604 Internal Control Module Random Access Memory (RAM) Error - General Information

Component Location





General Description

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.

DTC Description

TCM detects internal RAM value by itself. If the value TCM wrote on RAM differs from the value TCM read, Malfunction can be detected.
(MIL : 1 Driving Cycle)

DTC Detecting Condition