P0604

DTC P0604 - INTERNAL TRANSMISSION CONTROL MODULE (TCM) RANDOM ACCESS MEMORY [RAM] ERROR

Conditions for Setting the DTC
- The Transmission Control Module (TCM) cannot carry out the four RAM initialization routines within 20 milliseconds after ignition ON.
- TCM detects that the RAM cannot be written and read correctly.

Action Taken When the DTC Sets
- TCM will request the illumination of MIL and store DTC when TCM detects failures on two consecutive ignition cycle.

Conditions for Clearing the MIL/Power Lamp/DTC
- The TCM turns off the MIL when no further failures detected for three consecutive ignition cycles.
- The Scan-100 scan tool can clear the DTC from the TCM history.
- The TCM clears the DTC from the TCM history memory after forty consecutive ignition cycles without fault.





DTC P0604 - Internal Transmission Control Module (TCM) Random Access Memory [RAM] Error