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

LIGHTING (EXT)  LIGHTING SYSTEM  Daytime Running Light Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the daytime running lights.

WIRING DIAGRAM

E432147E04
0.698,0.458 4.063,0.656 3.365,0.198 10 false from Auxiliary Battery 0.74,1.104 1.198,1.302 0.458,0.198 10 false DRL 2.042,1.49 2.5,1.688 0.458,0.198 10 false DRL 1.771,0.854 1.927,1.052 0.156,0.198 10 false 5 1.771,1.104 1.927,1.302 0.156,0.198 10 false 2 2.469,0.844 2.625,1.042 0.156,0.198 10 false 3 2.458,1.104 2.615,1.302 0.156,0.198 10 false 1 4.292,1.104 4.604,1.302 0.313,0.198 10 false 3 4.656,1.771 4.969,1.969 0.313,0.198 10 false 4D 5.417,2.677 5.729,2.875 0.313,0.198 10 false MB 5.979,1.104 6.292,1.302 0.313,0.198 10 false 7 6.188,1.104 6.646,1.302 0.458,0.198 10 false DRL 4.656,1.938 6.073,2.573 1.417,0.635 10 false Power Distribution Box Assembly 2.479,2.281 2.635,2.479 0.156,0.198 10 false B 1.729,2.281 1.885,2.479 0.156,0.198 10 false E 1.729,3.552 1.885,3.75 0.156,0.198 10 false E 2.479,3.552 2.635,3.75 0.156,0.198 10 false B 2.688,2.177 2.844,2.375 0.156,0.198 10 false 6 1.542,2.188 1.729,2.385 0.188,0.198 10 false 5 1.385,2.719 1.844,2.917 0.458,0.198 10 false A95 1.375,2.875 4.583,3.073 3.208,0.198 10 false Headlight Assembly LH 1.417,4 1.875,4.198 0.458,0.198 10 false A94 1.417,4.146 4.625,4.344 3.208,0.198 10 false Headlight Assembly RH 5.427,2.854 7.083,3.427 1.656,0.573 10 false Main Body ECU (Multiplex Network Body ECU) 2.688,3.427 2.844,3.625 0.156,0.198 10 false 6 1.573,3.448 1.76,3.646 0.188,0.198 10 false 5

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.



PROCEDURE

1.CHECK OPERATION (CLEARANCE LIGHTS)
a.

Check the operation of the clearance lights.

OK:

The clearance lights operate normally.



Result:
Proceed to
OK
NG



OK

2.PERFORM ACTIVE TEST USING GTS

NG

GO TO PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


2.PERFORM ACTIVE TEST USING GTS
a.

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
Daytime Running Light Daytime running lights OFF or ON w/ Daytime Running Light
Body Electrical > Main Body > Active Test
Tester Display
Daytime Running Light
50004 449 53
OK:

Daytime running lights illuminate.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


NG

3.INSPECT DRL RELAY
3.INSPECT DRL RELAY

Click hereVehicle Exterior>LIGHTING (EXT)>RELAY>ON-VEHICLE INSPECTION

Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER SOURCE - DRL RELAY)

NG

REPLACE DRL RELAY

4.CHECK HARNESS AND CONNECTOR (POWER SOURCE - DRL RELAY)
a.

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

Standard Voltage:
Tester Connection Condition Specified Condition
2 (DRL relay) - Body ground Ignition switch off 11 to 14 V
5 (DRL relay) - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (DRL RELAY - HEADLIGHT ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (DRL RELAY - HEADLIGHT ASSEMBLY)
a.

Disconnect the A95 headlight assembly LH connector.


b.

Disconnect the A94 headlight assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(A95,A94)Location & Routing

Click Connector(A95)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly LH

Click Connector(A94)Engine Compartment>Engine Room Main Wire / Transmission Wire>Headlight Assembly RH

3 (DRL relay) - A95-6 (B) Always Below 1 Ω
3 (DRL relay) - A94-6 (B) Always Below 1 Ω
3 (DRL relay) or A95-6 (B) - Body ground Always 10 kΩ or higher
3 (DRL relay) or A94-6 (B) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (DRL RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (DRL RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 4D instrument power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (DRL relay) - 4D-3 Always Below 1 Ω
1 (DRL relay) or 4D-3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
E367360C37
1.74,0.583 2.115,0.833 0.375,0.25 4.875,0.938 5.25,1.188 0.375,0.25 3.76,2.063 4.135,1.552 false 0.479,0.438 0.792,0.635 0.313,0.198 10 false *a 1.844,0.635 2.156,0.833 0.313,0.198 10 false 4D 4.948,0.979 5.26,1.177 0.313,0.198 10 false MB 3.625,2.083 4.156,2.313 0.531,0.229 10 false DRL
*a Component without harness connected
(Power distribution box assembly) 		- -


a.

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4D-3 - MB-7 (DRL) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL