RM3660EC _51 Engine / Hybrid System _080778 8ZR-FXE ENGINE CONTROL _0392134 ECM A

8ZR-FXE ENGINE CONTROL 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
Replacement of ECM	Vehicle Identification Number (VIN) or frame number registration	DTC stored	(202304,999999,_51,_080778,_0393982,RM100000002BDLH,)
	ECU configuration	-	(202304,999999,_V1,_143216,_0598316,RM100000002B3MK,)
	Update ECU security key	Vehicle Control History (RoB) are stored	(202304,999999,_V1,_143216,_0598316,RM100000002B3ML,)
	Perform Total Short Trip Estimate Registration	-	(202304,999999,_51,_080778,_0393982,RM100000002BDLH,)

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

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven
Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.	(202304,999999,_95,_139716,_0584193,RM1000000029F4C,)

PROCEDURE

Hide Display 1. PRECAUTION

NOTICE:: ·

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY202304,202502,_V1,_143216,_0598315,RM100000002B3MI,202502,999999,_V1,_143216,_0598315,RM100000002RP07,

·

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.

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.

Procedure when replacing both battery ECU assembly and ECM:

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

ii.

Replace either ECU.

iii.

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

iv.

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.

vi.

Replace the other ECU.

vii.

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

viii.

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

HINT:: 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.

Hide Display 2. GPF DEPOSITION VALUES (w/ Differential Pressure Sensor)

NOTICE:: Before replacing the ECM, store the volumes of accumulated ash (metal oxide) and PM (Particulate Matter). After replacing the ECM, write the volumes of accumulated ash and PM to a new ECM.; Click hereEngine / Hybrid System>8ZR-FXE (ENGINE CONTROL)>SFI SYSTEM>REGISTRATION202304,999999,_51,_080778,_0393982,RM100000002BDLH_03_0014,

Hide Display 3. TOTAL SHORT TRIP ESTIMATE

HINT:: It requires when replacing the ECM.

Click hereEngine / Hybrid System>8ZR-FXE (ENGINE CONTROL)>SFI SYSTEM>REGISTRATION202304,999999,_51,_080778,_0393982,RM100000002BDLH_03_0013,

Hide Display 4.REMOVE AUXILIARY BATTERY

Click hereGeneral>MAINTENANCE>8ZR-FXE AUXILIARY BATTERY>REMOVAL202304,999999,_V1,_080956,_0392376,RM100000002ACL7,

Hide Display 89661 5.REMOVE ECM

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

NOTICE:: 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 2 nuts and ECM from the engine mounting insulator LH.

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

Hide Display 89667E 6.REMOVE NO. 1 ECM BRACKET

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

Hide Display 89668 7.REMOVE NO. 2 ECM BRACKET

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