RM35X0E _59 Vehicle Exterior _079256 LIGHTING (EXT) _0396321 LIGHTING SYSTEM(w/ Headlight ECU) C

LIGHTING (EXT) LIGHTING SYSTEM(w/ Headlight ECU) B2456 Left Headlight ECU Variation Error

DESCRIPTION

This DTC is stored if the headlight ECU sub-assembly LH for another destination is installed.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Note
B2456	Left Headlight ECU Variation Error	Detection condition: The engine switch is on (IG) Malfunction status: Vehicle specification information received via CAN communication is continuously mismatched Malfunction duration: -	· ECM · Main body ECU (multiplex network body ECU) · Headlight ECU sub-assembly LH	HL AutoLeveling	-

CAUTION / NOTICE / HINT

NOTICE:: ·

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>INITIALIZATION201906,999999,_59,_079256,_0396321,RM100000001IGX8,

·

When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

·

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE

1.CLEAR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Enter the following menus: Body Electrical / HL AutoLeveling / Clear DTCs.

Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs: 50002 361

Result:

Proceed to
NEXT

2.CHECK FOR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes: 50001 361

OK:: DTC B2456 is not output.

Result:

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_V1,_078841,_0386803,RM100000001GTWY,

3.CHECK ECM

Check if the part number of the ECM installed to the vehicle is correct.

OK:: Part number is correct.

Result:

Proceed to
OK
NG

4.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE ECM

for 1GD-FTV:

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECM>REMOVAL201906,202005,_51,_078856,_0387390,RM100000001IRG8,202005,202107,_51,_078856,_0387390,RM100000001O3OH,202107,202208,_51,_078856,_0387390,RM100000001WVNP,202208,202310,_51,_078856,_0387390,RM1000000025S9G,202310,999999,_51,_078856,_0387390,RM100000002G3CJ,

for 7GR-FKS:

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL201906,202310,_51,_078720,_0381918,RM100000001IOND,202310,999999,_51,_078720,_0381918,RM100000002G3CO,

4.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Check if the part number of the main body ECU (multiplex network body ECU) installed to the vehicle is correct.

OK:: Part number is correct.

Result:

Proceed to
OK
NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ECU>REMOVAL201906,999999,_59,_079256,_0396102,RM100000001IFPR,

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL201906,202310,_57,_079061,_0383489,RM100000001IVKI,202310,999999,_57,_079061,_0383489,RM100000002EQ22,

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL201906,202310,_57,_079061,_0383490,RM100000001IVRX,202310,999999,_57,_079061,_0383490,RM100000002EQ24,