SFI SYSTEM(w/ Secondary Air Injection System), Diagnostic DTC:P0604

DTC Code DTC Name
P0604 Random Access Memory (RAM)

DESCRIPTION

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 Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standard, the ECM will illuminate the MIL and store DTC(s) immediately.

DTC Code DTC Detection Condition Trouble Area
P0604 ECM RAM errors. ECM

PROCEDURE


  1. CHECK DTC


    1. Clear DTC Click here.

    2. Turn the engine switch off.

    3. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.

    4. Connect the cable to the negative (-) battery terminal.

    5. Turn the engine switch on (IG).

    6. Check DTC.

      OK
      P0604 is not output.

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPLACE ECM Click here