P0604

DTC P0604 PCM RAM Error




Circuit Description
The powertrain Control module (PCM) used Main CPU RAM and Watchdog CPU RAM.

Conditions for Setting the DTC
- This code detects inconsistencies between Main CPU RAM and Watchdog CPU RAM.

Action Taken When the DTC Sets
- The PCM will not illuminate the malfunction indicator lamp (MIL).
- The PCM will store conditions which were present when the DTC was set in the Failure Records data only.

Conditions for Clearing the MIL/DTC
- The PCM will turn the MIL "OFF" on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
- A history DTC P0604 will clear after 40 consecutive warm-up cycles have occurred without a fault.
- DTC P0604 can be cleared by using the Tech 2 "Clear Info." function or by disconnecting the PCM battery feed.

Steps 1 - 2:

Test Description