SFI SYSTEM, Diagnostic DTC:P0604, P0606, P060A, P060D, P060E, P0657, P1607

DTC Code DTC Name
P0604 Random Access Memory (RAM)
P0606 ECM / PCM Processor
P060A Internal Control Module Monitoring Processor Performance
P060D Internal Control Module Accelerator Pedal Position Performance
P060E Internal Control Module Throttle Position Performance
P0657 Actuator Supply Voltage Circuit / Open
P1607 Cruise Control Input Processor

DESCRIPTION

The ECM continuously monitors its internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check ensures that the ECM is functioning properly. If any malfunction is detected, the ECM stores the appropriate DTC and illuminates the MIL.

The ECM memory status is diagnosed by internal "mirroring" of the main CPU and the sub CPU to detect Random Access Memory (RAM) errors. The 2 CPUs also perform continuous mutual monitoring. The ECM illuminates the MIL and stores a DTC if: 1) outputs from the 2 CPUs are different or deviate from the standard, 2) the signals sent to the throttle actuator deviate from the standard, 3) a malfunction is found in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.

DTC No. DTC Detection Condition Trouble Area

P0604

P0606

P060A

P060D

P060E

P0657

P1607

 An ECM internal error (1 trip detection logic). ECM

CAUTION / NOTICE / HINT

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    4. Read the DTC.

      Result
      Result Proceed to
      DTC P0604, P0606, P060A, P060D, P060E P0657 and/or P1607 are output A
      DTC is not output B

    A

    REPLACE ECM Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here