ECM REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during ECM removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced
Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Auxiliary battery terminal is disconnected/reconnected Memorize steering angle neutral point Lane departure alert system (w/ Steering Control)

Click here

Intelligent clearance sonar system*1
Simple intelligent parking assist system*1
Pre-crash safety system
Adaptive high beam system
Parking assist monitor system

Click here

Initialize back door lock Power door lock control system

Click here


    for SFI system (w/ Canister Pump Module)

  • Replacement of ECM

 Perform Vehicle Identification Number (VIN) registration MIL comes on

Click here


    for SFI system (w/o Canister Pump Module)

  • Replacement of ECM

 Perform Vehicle Identification Number (VIN) or frame number registration MIL comes on

Click here

*1: When performing learning using the GTS.

Click here

Note


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

    Click here

  • If the ECM has been struck or dropped, replace it.

  • Perform the Vehicle Identification Number (VIN) registration when replacing the ECM.

    w/ Canister Pump Module

    Click here

    w/o Canister Pump Module

    Click here

PROCEDURE


  1. PRECAUTION

    HV battery learning values are stored in the battery ECU assembly and ECM and are used to detect malfunctions and illuminate the hybrid battery indicator light in the combination meter assembly. When either of these ECUs is replaced, the new ECU receives the HV battery learning values from the other ECU and stores them.

    Note


    • Do not replace the battery ECU assembly and ECM at the same time as the HV battery learning values will be lost. However, if it is necessary to replace both ECUs at the same time, replace them by following the procedure below.

    • Do not replace the battery ECU assembly or ECM with a used one from another vehicle.


    1. Procedure when replacing both battery ECU assembly and ECM:


      1. Disconnect the cable from the negative (-) auxiliary battery terminal.

      2. Replace either ECU.

      3. Connect the cable to the negative (-) auxiliary battery terminal.

      4. Turn the power switch on (READY) and wait for 5 minutes or more.

      5. Turn the power switch off and disconnect the cable from the negative (-) auxiliary battery terminal.

      6. Replace the other ECU.

      7. Connect the cable to the negative (-) auxiliary battery terminal.

      8. Check that the power switch can be turned on (READY).

        Tech Tips

        If the battery ECU assembly and ECM are replaced at the same time without following the above procedure, replace either the battery ECU assembly and ECM with its original one and then replace it again by following the above procedure. If the correct procedure is not followed, perform the procedure again from the beginning.

  2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

    Click here

  3. REMOVE ECM


    1. B006H8SC01
      *a Push
      *b Lock

      Raise the 2 levers while pushing the locks on the levers, and disconnect the 2 ECM connectors.

      Note

      After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.

    2. B006IM4

      Disengage the 2 clamps.

    3. Remove the bolt and separate the engine wire from the No. 1 ECM bracket.

    4. B006J2RC01
      B006IR6 Bolt
      B006IKP Nut

      Remove the bolt, nut and ECM.

      Note

      If the ECM has been struck or dropped, replace it.

  4. REMOVE NO. 1 ECM BRACKET


    1. B006HZS

      Remove the 2 screws and No. 1 ECM bracket from the ECM.

  5. REMOVE NO. 2 ECM BRACKET


    1. B006HJJ

      Remove the 2 screws and No. 2 ECM bracket from the ECM.