SFI SYSTEM, Diagnostic DTC:P0601

DTC Code DTC Name
P0601 Internal Control Module Memory Checksum Error

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0601 Internal Control Module Memory Checksum Error

DTC Detection Condition


    Enable Criteria

  • -


    Malfunction Criteria

  • Checksum fail or length change in EE memory


    Diagnostic Mask

  • The MIL will be illuminated if a fault is present


    Monitor

  • at ECU power up


    Potential failure modes

  • -

 ECM Comes on DTC stored

MONITOR DESCRIPTION

These codes are used by the ECU to check the integrity of the software and calibration data.

P0601 checks that on power up the checksum for calibration data is the same as checksum saved on the previous power down.

CAUTION / NOTICE / HINT

Note

After turning engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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Tech Tips

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. READ OUTPUT DTC (DTC P0601)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

    5. Turn the GTS off.

    6. Turn the engine switch off.

    7. Disconnect the GTS.

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

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

    10. Connect the GTS to the DLC3.

    11. Turn the engine switch on (IG)

    12. Turn the GTS on.

    13. Wait 16 seconds or more.

    14. Enter the following menus: Powertrain / Engine / Trouble Codes.

    15. Read the DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P0601 is output B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here