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Engine Control System (Service Information): ECM: Removal: Removal

WARNING:

When removing and installing the ECM and hybrid vehicle control ECU, be sure to distinguish the wire harnesses of the ECM and hybrid vehicle control ECU. If the wire harnesses are incorrectly connected, damage may occur to the engine.

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    WARNING:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

  2. REMOVE COOL AIR INTAKE DUCT SEAL  Refer to  5
  3. REMOVE ENGINE ROOM SIDE COVER LH  Refer to  6
  4. REMOVE ENGINE ROOM NO. 1 RELAY BLOCK COVER 
  5. REMOVE RADIATOR RESERVOIR ASSEMBLY 
      Fig 1: Locating Radiator Reserve Tank Assembly Bolts
      GTY146879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the inverter drain hose from the bracket.
    2. Remove the 2 bolts and radiator reservoir.
  6. REMOVE HYBRID VEHICLE CONTROL ECU 
      Fig 2: Identifying Hybrid Vehicle Control ECU Wire Harness Clamp
      GTY147434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Detach the side of the wire harness clamp labeled A from the wire harness.
    2. Detach the 3 wire harness clamps.
      3. Fig 3: Locating Hybrid Vehicle Control ECU Nut And Screws
      GTY146880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the nut, 4 screws and bracket.
    4. Remove the 2 screws and ECU.
      5. Fig 4: Raising Lock Lever
      GTY128022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Make sure that the lock lever is raised 90° as shown in the illustration before disconnecting the connectors. Failure to do this may cause the connectors to break.

    5. Raise the lock lever and disconnect the 2 connectors. Remove the hybrid vehicle control ECU.
  7. REMOVE ECM 
      Fig 5: Locating ECM And Bracket Nuts
      GTY126420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the 2 nuts and ECM with bracket.
      2. Fig 6: Disconnecting ECM Connectors
      GTY121862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 2 ECM connectors.
      1. Raise the 2 levers while pushing the locks on the 2 levers, and remove the 2 ECM connectors.
      3. Fig 7: Locating ECM Lower Bracket Screws
      GTY130987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 2 screws and ECM lower bracket.
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