P0604

DTC P0604 Random Access Memory (RAM)

DESCRIPTION

DTC Detection Condition:

The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. This is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect the Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunctions Thresholds:

MONITOR DESCRIPTION

Step 1:

INSPECTION PROCEDURE