SFI SYSTEM, Diagnostic DTC:P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607

DTC Code DTC Name
P0604 Internal Control Module Random Access Memory (RAM) Error
P0606 ECM / PCM Processor
P060A Internal Control Module Monitoring Processor Performance
P060B Internal Control Module A/D Processing 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 own 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 sets 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 two CPUs also perform continuous mutual monitoring. The ECM illuminates the MIL and sets a DTC if: 1) outputs from the two 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

P060B

P060D

P060E

P0657

P1607

 ECM internal error (1 trip detection logic) ECM

INSPECTION PROCEDURE

Read freeze frame data using an intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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 (IN ADDITION TO DTC P0604, P0606, P0607 AND/OR P0657)


    1. Clear DTC Click here.

    2. Turn the engine switch off.

    3. Disconnect the battery negative terminal and wait for 1 minute Click here.

    4. Connect the battery negative terminal Click here.

    5. Turn the engine switch on (IG).

    6. Connect the intelligent tester to the DLC3.

    7. Turn the intelligent tester on.

    8. Wait 16 seconds or more.

    9. Enter the following menus: Powertrain / Engine / DTC.

    10. Read the DTC.

      Result
      Display (DTC Output) Proceed to
      DTCs P0604, P0606, P060A, P060B, P060D, P060E, P0657 and/or P1607 are output A
      No output DTC B

    B

    GO TO DTC CHART Click here

    A

    REPLACE ECM Click here