CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the ECM removal/installation are shown below.
Replacement Part or Procedure | Necessary Procedures | Effects/Inoperative when not Performed | Link |
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Battery terminal is disconnected/reconnected | Drive the vehicle until stop and start control is permitted (approximately 15 to 40 minutes) | Stop and start system | |
Memorize steering angle neutral point | Panoramic view monitor system | ||
Initialize back door lock | Power door lock control system | ||
Initialize servo motor | Power door lock control system | ||
Reset slide door close position | Power slide door system | ||
Reset back door close position | Power back door system | ||
Replacement of ECM | Perform Vehicle Identification Number (VIN) or frame number registration |
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ECU Communication ID Registration (Immobiliser system) | Engine start function | See Service Bulletin for the registration method. | |
Perform the following procedures in the order shown:
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Perform code registration (Immobiliser system) |
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See Service Bulletin for the registration method. |
PROCEDURE
PRECAUTION
Note
After turning the 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.
If the ECM has been struck or dropped, replace it.
Perform the Vehicle Identification Number (VIN) registration when replacing the ECM.
REMOVE RADIATOR COVER SUB-ASSEMBLY (for ALPHARD)
REMOVE RADIATOR COVER SUB-ASSEMBLY (for VELLFIRE)
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Note
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
REMOVE BATTERY
REMOVE AIR CLEANER CAP SUB-ASSEMBLY
REMOVE AIR CLEANER CASE SUB-ASSEMBLY
REMOVE INLET NO. 1 AIR CLEANER
Remove the bolt and inlet No. 1 air cleaner.
REMOVE INLET NO. 2 AIR CLEANER
Remove the bolt and inlet No. 2 air cleaner.
REMOVE ECM
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.
*a | Wire Harness Clamp |
*b | Guide |
Disengage the wire harness clamp.
Remove the 2 bolts and disengage the guide to remove the ECM.
Note
If the ECM has been struck or dropped, replace it.
REMOVE NO. 1 ECM BRACKET
Remove the 2 screws and No. 1 ECM bracket from the ECM.
REMOVE NO. 2 ECM BRACKET
Remove the 2 screws and No. 2 ECM bracket from the ECM.