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.
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) | |
Intelligent clearance sonar system*1 | |||
Simple intelligent parking assist system*1 | |||
Pre-crash safety system | |||
Adaptive high beam system | |||
Parking assist monitor system | |||
Initialize back door lock | Power door lock control system | ||
for SFI system (w/ Canister Pump Module) |
Perform Vehicle Identification Number (VIN) registration | MIL comes on | |
for SFI system (w/o Canister Pump Module) |
Perform Vehicle Identification Number (VIN) or frame number registration | MIL comes on |
*1: When performing learning using the GTS.
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.
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
w/o Canister Pump Module
PROCEDURE
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.
Procedure when replacing both battery ECU assembly and ECM:
Disconnect the cable from the negative (-) auxiliary battery terminal.
Replace either ECU.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (READY) and wait for 5 minutes or more.
Turn the power switch off and disconnect the cable from the negative (-) auxiliary battery terminal.
Replace the other ECU.
Connect the cable to the negative (-) auxiliary battery terminal.
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.
DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL
REMOVE ECM
*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.
Disengage the 2 clamps.
Remove the bolt and separate the engine wire from the No. 1 ECM bracket.
Bolt | |
Nut |
Remove the bolt, nut and 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.