RM38N0EC _59 Vehicle Exterior _111834 LIGHTING (EXT) _0499887 LIGHTING SYSTEM J

LIGHTING (EXT) LIGHTING SYSTEM High Beam Headlight Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the high beam headlights.

WIRING DIAGRAM

3.271,2.448 3.844,2.729 0.573,0.281 10 false HI 3.271,0.688 3.698,0.885 0.427,0.198 10 false HI 5.396,2.302 5.708,2.5 0.313,0.198 10 false E37 5.406,2.479 7.063,3.198 1.656,0.719 10 false Main Body ECU (Multiplex Network Body ECU) 2.021,1.25 3,1.448 0.979,0.198 10 false A95 2.021,1.406 4.01,1.604 1.99,0.198 10 false Headlight Assembly LH 3.542,0.594 4,0.792 0.458,0.198 10 false 3 3.542,2.344 4,2.542 0.458,0.198 10 false 3 2.031,3.01 3.01,3.208 0.979,0.198 10 false A94 2.021,3.167 4.01,3.365 1.99,0.198 10 false Headlight Assembly RH 5.938,0.594 6.25,0.792 0.313,0.198 10 false 22 6.208,0.594 6.667,0.792 0.458,0.198 10 false DIM

CAUTION / NOTICE / HINT

NOTICE:: ·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

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

·

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.

Click herePower Source / Network>NETWORKING>CXPI COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING202111,999999,_57,_111829,_0505700,RM100000001ZOF3,

PROCEDURE

1.PERFORM ACTIVE TEST USING GTS

Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
High Beam Headlight	High beam headlights	OFF or ON	-

Body Electrical > Main Body > Active Test

Tester Display
High Beam Headlight

50004 449 52

OK:: High beam headlights illuminate.

Result:

Proceed to
OK
NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE202111,202303,_59,_111834,_0499887,RM100000001Z0KH,202303,999999,_59,_111834,_0499887,RM100000002MJYF,

2.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Disconnect the A95 headlight assembly LH connector.

Disconnect the A94 headlight assembly RH connector.

Disconnect the E37 main body ECU (multiplex network body ECU) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A95,E37,A94)Location & Routingewd_type=routing;type=c,c,c;code=A95,E37,A94 Click Connector(A95)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly LHewd_type=component;type=c;code=A95;pinno=3 Click Connector(E37)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E37;pinno=22 Click Connector(A94)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly RHewd_type=component;type=c;code=A94;pinno=3
A95-3 (HI) - E37-22 (DIM)	Always	Below 1 Ω
A94-3 (HI) - E37-22 (DIM)	Always	Below 1 Ω
A95-3 (HI), A94-3 (HI) or E37-22 (DIM) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

REPAIR OR REPLACE HARNESS OR CONNECTOR