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

LIGHTING (EXT)  LIGHTING SYSTEM(w/ Headlight ECU)  Automatic High Beam Switch Indicator does not Come ON  


DESCRIPTION

When the automatic high beam system is on, the main body ECU (multiplex network body ECU) illuminates the auto high beam switch indicator.

WIRING DIAGRAM

E367187E28
3.302,1.646 4.875,1.927 1.573,0.281 10 false Auto High Beam Switch 3.313,1.5 3.677,1.677 0.365,0.177 10 false N49 3.104,0.948 3.469,1.125 0.365,0.177 10 false IND+ 2.927,0.948 3.292,1.125 0.365,0.177 10 false 3 4.604,0.969 5.031,1.177 0.427,0.208 10 false AZBI 4.99,0.948 5.354,1.125 0.365,0.177 10 false 4 5.823,0.938 6.25,1.146 0.427,0.208 10 false AHID 5.49,2.073 7.135,2.521 1.646,0.448 10 false Main Body ECU (Multiplex Network Body ECU) 5.583,0.948 5.948,1.125 0.365,0.177 10 false 21 5.49,1.906 5.854,2.083 0.365,0.177 10 false N20 1.917,1.219 3.49,1.5 1.573,0.281 10 false ECU-B NO.3 0.563,1.052 1.448,1.26 0.885,0.208 10 false from Battery

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.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Active Test.


e.

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
Automatic High Beam Switch Light Auto high beam switch indicator light OFF or ON -
Body Electrical > Main Body > Active Test
Tester Display
Automatic High Beam Switch Light
50004 123 74
OK:

Auto high beam switch indicator light illuminates.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

2.INSPECT AUTO HIGH BEAM SWITCH
2.INSPECT AUTO HIGH BEAM SWITCH
a.

Remove the auto high beam switch.

Click hereVehicle Exterior>LIGHTING (EXT)>AUTOMATIC HIGH BEAM MAIN SWITCH>REMOVAL


b.

Inspect the auto high beam switch.

Click hereVehicle Exterior>LIGHTING (EXT)>AUTOMATIC HIGH BEAM MAIN SWITCH>INSPECTION


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - BATTERY)

NG

REPLACE AUTO HIGH BEAM SWITCH

Click hereVehicle Exterior>LIGHTING (EXT)>AUTOMATIC HIGH BEAM MAIN SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - BATTERY)
a.

Disconnect the auto high beam switch connector.


b.
E411298C02
1.563,0.208 1.948,0.49 0.385,0.281 1.208,1.917 1.625,1.5 true 1.635,0.26 2.094,0.458 0.458,0.198 10 false N49 0.302,0.365 0.76,0.563 0.458,0.198 10 false *a 0.885,1.906 1.344,2.104 0.458,0.198 10 false IND+
*a Front view of wire harness connector
(to Auto High Beam Switch)


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

Standard Voltage:
Tester Connection Condition Specified Condition
N49-3 (IND+) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the N49 auto high beam switch connector.


b.

Disconnect the N20 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N49-4 (AZBI) - N20-21 (AHID) Always Below 1 Ω
N49-4 (AZBI) or N20-21 (AHID) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR