ECD SYSTEM, Diagnostic DTC:P0601, P0605

DTC Code DTC Name
P0601 ECU Test 1 Checksum Application Software, Checksum Calibration Value
P0605 ECU Test 1 Checksum Boot Software

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P0601 ECM fault

  • ECM

 ON ON
P0605 ECM fault

  • ECM

 ON ON

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P0601 Engine does not start. -
P0605 Engine does not start. -

INSPECTION PROCEDURE

Tech Tips


  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE


  1. CHECK DTC OUTPUT (P0601 AND/OR P0605)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Turn the ignition switch to the ON position and turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

      Result
      Display (DTC Output) Proceed To
      P0601 and/or P0605 is out put again A
      No DTC output B

    B

    CHECK FOR INTERMITTENT PROBLEMS

    A

    REPLACE ECM