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Engine Control System: ECM: Replacement

NOTE:
  • Wipe water off the ECM cover and edges.
  • Replacement of the ECM should be performed indoors, away from rain.
  • No water should come into contact with the inside of the ECM. Connectors and screws should also be kept away from water.
  1. DISCONNECT BATTERY NEGATIVE TERMINAL 
  2. REMOVE ENGINE ROOM SIDE COVER 
    1. Remove the 3 clips and engine room side cover.
  3. REMOVE ECM COVER 
    1. Remove the 3 bolts and ECM cover.
  4. REMOVE ECM 
    1. Remove the 2 nuts.
    2. Disconnect the connector and remove the ECM.
  5. REMOVE ECM GASKET 
    Fig 1: Removing ECM Gasket
    G02998089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Peel off the sponge part of the gasket.
    2. Spray gasket remover or equivalent on the remaining tape of the gasket.
      Fig 2: Spraying Gasket
      G02998090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: When using gasket remover or equivalent, cover the ECM connector with a shop rag.
    3. Use a cutter knife. to remove the tape of the gasket.
    Fig 3: Removing Taping Gasket Using Cutter
    G02998091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: Do not damage the ECM seal's surface with the knife.
  6. INSTALL ECM GASKET 
    1. Clean the ECM's seal surface to the gasket with non-reside solvent.
    2. Attach the gasket on the ECM.
  7. INSTALL ECM 
    NOTE:
    • After replacing the ECM, it is necessary to initialize the ECM.
    • Check that no foreign objects are stuck inside the ECM box.
    1. Connect the connector and install the ECM with the 2 nuts.
    1. Torque: 5.5 N.m (55 kgf.cm, 48 in..lbf) 
  8. INSTALL ECM COVER 
    1. Install the ECM cover with the 3 bolts.
    1. Torque: 5.0 N.m (51 kgf.cm, 44 in..lbf) 
  9. INSTALL ENGINE ROOM SIDE COVER 
    1. Install the engine room side cover with the 3 clips.
  10. CONNECT BATTERY NEGATIVE TERMINAL 
  11. CONFIGURE ECM FOR OPTIONAL DYNAMIC RADAR/LASER CRUISE CONTROL 
    NOTE: When replacing the ECM of vehicles with the optional dynamic radar/laser cruise control system, it is necessary to configure the ECM for this option.
    1. Be sure to perform the following procedures after replacing the ECM.
    1. Turn the ignition switch ON.
    2. Turn the cruise main switch ON.
    3. With the brake pedal depressed, set the cruise control main switch to RES/ACC 3 times within 3 seconds. Check that the VSC buzzer sounds at this time.
    4. Turn the ignition switch OFF.
    5. Connect the intelligent tester II to the DLC3.
    6. Turn the ignition switch ON and push the intelligent tester II main switch ON.
    7. Select the item "L/C Option Flag" in the Data List.
    8. Check that YES is displayed.
  12. POWER WINDOW CONTROL SYSTEM INITIALIZE (See  INITIALIZATION  ) 
  13. FRONT POWER SEAT CONTROL SYSTEM INITIALIZE (See  INITIALIZATION  ) 
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