RM38T0EC _59 Vehicle Exterior _112294 LIGHTING (EXT) _0510962 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

for LED Headlight


E479586E01
0.104,0.083 2.083,0.354 1.979,0.271 12 false for TFTM Made: 1.302,2.396 2.24,2.583 0.938,0.188 10 false A176 1.292,2.573 3.073,2.844 1.781,0.271 10 false Headlight Assembly LH 1.292,3.875 2.229,4.063 0.938,0.188 10 false A175 1.292,4.063 3.073,4.333 1.781,0.271 10 false Headlight Assembly RH 5.448,3.625 5.75,3.854 0.302,0.229 10 false I85 5.438,3.792 7.073,4.281 1.635,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 5.75,0.74 6.073,1.052 0.323,0.313 10 false 22 6.01,0.729 6.406,0.917 0.396,0.188 10 false DIM 1.167,1.813 1.323,2.01 0.156,0.198 10 false 2 2.781,1.792 2.938,1.99 0.156,0.198 10 false 6 1.156,3.26 1.313,3.458 0.156,0.198 10 false 2 2.76,3.26 2.917,3.458 0.156,0.198 10 false 6 1.344,1.844 1.5,2.042 0.156,0.198 10 false E 2.552,1.927 2.875,2.135 0.323,0.208 10 false HI 1.344,3.313 1.5,3.51 0.156,0.198 10 false E 2.552,3.375 2.875,3.583 0.323,0.208 10 false HI

E363133E20
0.448,0.427 1.313,0.854 0.865,0.427 10 false from Auxiliary Battery 0.104,0.083 2.083,0.354 1.979,0.271 12 false for GTMC Made: 3.927,1.135 4.865,1.396 0.938,0.26 10 false H-LP HI 1.302,2.396 2.24,2.583 0.938,0.188 10 false A176 1.292,2.573 3.073,2.844 1.781,0.271 10 false Headlight Assembly LH 1.292,3.875 2.229,4.063 0.938,0.188 10 false A175 1.292,4.063 3.073,4.333 1.781,0.271 10 false Headlight Assembly RH 5.448,3.625 5.75,3.854 0.302,0.229 10 false I85 5.438,3.792 7.073,4.281 1.635,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 3.729,0.354 3.885,0.552 0.156,0.198 10 false 5 3.75,0.74 3.906,0.938 0.156,0.198 10 false 2 4.51,0.354 4.667,0.552 0.156,0.198 10 false 3 4.51,0.729 4.667,0.927 0.156,0.198 10 false 1 5.75,0.74 6.073,1.052 0.323,0.313 10 false 22 6.01,0.729 6.406,0.917 0.396,0.188 10 false DIM 1.167,1.813 1.323,2.01 0.156,0.198 10 false 6 2.781,1.792 2.938,1.99 0.156,0.198 10 false 8 1.156,3.26 1.313,3.458 0.156,0.198 10 false 6 2.781,3.26 2.938,3.458 0.156,0.198 10 false 8 1.354,1.927 1.51,2.125 0.156,0.198 10 false E 2.375,1.927 2.76,2.167 0.385,0.24 10 false SOL 1.354,3.396 1.51,3.594 0.156,0.198 10 false E 2.385,3.385 2.771,3.625 0.385,0.24 10 false SOL 2.385,0.646 3.323,0.906 0.938,0.26 10 false H-LP HI


for Halogen Headlight


E363133E18
0.448,0.427 1.313,0.854 0.865,0.427 10 false from Auxiliary Battery 0.104,0.083 2.083,0.354 1.979,0.271 12 false for TFTM Made: 3.927,1.135 4.865,1.396 0.938,0.26 10 false H-LP HI 1.302,2.396 2.24,2.583 0.938,0.188 10 false A178 1.292,2.573 3.073,2.844 1.781,0.271 10 false Headlight Assembly LH 1.292,3.875 2.229,4.063 0.938,0.188 10 false A177 1.292,4.063 3.073,4.333 1.781,0.271 10 false Headlight Assembly RH 5.448,3.625 5.75,3.854 0.302,0.229 10 false I85 5.438,3.792 7.073,4.281 1.635,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 3.729,0.354 3.885,0.552 0.156,0.198 10 false 5 3.75,0.74 3.906,0.938 0.156,0.198 10 false 2 4.51,0.354 4.667,0.552 0.156,0.198 10 false 3 4.51,0.729 4.667,0.927 0.156,0.198 10 false 1 5.75,0.74 6.073,1.052 0.323,0.313 10 false 22 6.01,0.729 6.406,0.917 0.396,0.188 10 false DIM 1.167,1.813 1.323,2.01 0.156,0.198 10 false 8 2.781,1.792 2.938,1.99 0.156,0.198 10 false 4 1.156,3.26 1.313,3.458 0.156,0.198 10 false 8 2.792,3.26 2.948,3.458 0.156,0.198 10 false 4 1.344,1.844 1.5,2.042 0.156,0.198 10 false E 2.406,1.927 2.729,2.135 0.323,0.208 10 false SOL 1.344,3.313 1.5,3.51 0.156,0.198 10 false E 2.396,3.375 2.719,3.583 0.323,0.208 10 false SOL 2.385,0.646 3.323,0.906 0.938,0.26 10 false H-LP HI

E363133E21
0.448,0.427 1.313,0.854 0.865,0.427 10 false from Auxiliary Battery 0.104,0.083 2.083,0.354 1.979,0.271 12 false for GTMC Made: 3.927,1.135 4.865,1.396 0.938,0.26 10 false H-LP HI 1.302,2.396 2.24,2.583 0.938,0.188 10 false A180 1.292,2.573 3.073,2.844 1.781,0.271 10 false Headlight Assembly LH 1.292,3.875 2.229,4.063 0.938,0.188 10 false A179 1.292,4.063 3.073,4.333 1.781,0.271 10 false Headlight Assembly RH 5.448,3.625 5.75,3.854 0.302,0.229 10 false I85 5.438,3.792 7.073,4.281 1.635,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 3.729,0.354 3.885,0.552 0.156,0.198 10 false 5 3.75,0.74 3.906,0.938 0.156,0.198 10 false 2 4.51,0.354 4.667,0.552 0.156,0.198 10 false 3 4.51,0.729 4.667,0.927 0.156,0.198 10 false 1 5.75,0.74 6.073,1.052 0.323,0.313 10 false 22 6.01,0.729 6.406,0.917 0.396,0.188 10 false DIM 1.167,1.813 1.323,2.01 0.156,0.198 10 false 1 2.781,1.792 2.938,1.99 0.156,0.198 10 false 2 1.156,3.26 1.313,3.458 0.156,0.198 10 false 1 2.781,3.26 2.938,3.458 0.156,0.198 10 false 2 1.354,1.906 1.51,2.104 0.156,0.198 10 false E 2.385,1.917 2.792,2.198 0.406,0.281 10 false SOL 1.354,3.396 1.51,3.594 0.156,0.198 10 false E 2.385,3.396 2.802,3.688 0.417,0.292 10 false SOL 2.385,0.646 3.323,0.906 0.938,0.26 10 false H-LP HI


CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the main body ECU (multiplex network body ECU), refer to refer to Service Bulletin.*1

·

Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table.

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

·

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

for HEV Model: Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model: Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING

*1: w/ Smart Entry and Start System




PROCEDURE

1.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
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



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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


NG

2.CHECK VEHICLE TYPE
2.CHECK VEHICLE TYPE
a.

Check vehicle type.


Result:
Result Proceed to
for LED Headlight A
for Halogen Headlight B



A

3.CHECK VEHICLE TYPE

B

8.CHECK VEHICLE TYPE
3.CHECK VEHICLE TYPE
a.

Check vehicle type.


Result:
Result Proceed to
for TFTM Made A
for GTMC Made B



A

4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)

B

5.INSPECT H-LP HI RELAY
4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)
a.

Disconnect the A176 headlight assembly LH connector.


b.

Disconnect the A175 headlight assembly RH connector.


c.

Disconnect the I85 main body ECU (Multiplex network body ECU) connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I85-22 (DIM) - A176-6 (HI) Always Below 1 Ω
I85-22 (DIM) - A175-6 (HI) Always Below 1 Ω
A176-2 (E) - Body ground Always Below 1 Ω
A175-2 (E) - Body ground Always Below 1 Ω
I85-22 (DIM) - Body ground Always 10 kΩ or higher



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

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT H-LP HI RELAY
a.

Remove the H-LP HI relay from the No. 1 engine room relay block.


b.

Inspect the H-LP HI relay.

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


Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)

NG

REPLACE H-LP HI RELAY

6.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)
a.
E479551C01
0.073,0.052 0.427,0.354 0.354,0.302 10 false *1 0.375,0.375 0.729,0.677 0.354,0.302 10 false *2
*1 No. 1 Engine Room Relay Block
*2 H-LP HI Relay Holder


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

Standard Voltage:
Tester Connection Condition Specified Condition
Relay terminal 2- Body ground Always 11 to 14 V
Relay terminal 5- Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)
a.

Disconnect the A176 headlight assembly LH connector.


b.

Disconnect the A175 headlight assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Relay terminal 3 - A176-8 (SOL) Always Below 1 Ω
Relay terminal 3 - A175-8 (SOL) Always Below 1 Ω
A176-6 (E) - Body ground Always Below 1 Ω
A175-6 (E) - Body ground Always Below 1 Ω
Relay terminal 3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

15.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK VEHICLE TYPE
a.

Check vehicle type.


Result:
Result Proceed to
for TFTM Made A
for GTMC Made B



A

9.INSPECT H-LP HI RELAY

B

12.INSPECT H-LP HI RELAY
9.INSPECT H-LP HI RELAY
a.

Remove the H-LP HI relay from the No. 1 engine room relay block.


b.

Inspect the H-LP HI relay.

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


Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)

NG

REPLACE H-LP HI RELAY

10.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)
a.
E479551C01
0.073,0.052 0.427,0.354 0.354,0.302 10 false *1 0.375,0.375 0.729,0.677 0.354,0.302 10 false *2
*1 No. 1 Engine Room Relay Block
*2 H-LP HI Relay Holder


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

Standard Voltage:
Tester Connection Condition Specified Condition
Relay terminal 2- Body ground Always 11 to 14 V
Relay terminal 5- Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

11.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)
a.

Disconnect the A178 headlight assembly LH connector.


b.

Disconnect the A177 headlight assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Relay terminal 3 - A178-4 (SOL) Always Below 1 Ω
Relay terminal 3 - A177-4 (SOL) Always Below 1 Ω
A178-8 (E) - Body ground Always Below 1 Ω
A177-8 (E) - Body ground Always Below 1 Ω
Relay terminal 3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

15.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.INSPECT H-LP HI RELAY
a.

Remove the H-LP HI relay from the No. 1 engine room relay block.


b.

Inspect the H-LP HI relay.

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


Result:
Proceed to
OK
NG



OK

13.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)

NG

REPLACE H-LP HI RELAY

13.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - BATTERY)
a.
E479551C01
0.073,0.052 0.427,0.354 0.354,0.302 10 false *1 0.375,0.375 0.729,0.677 0.354,0.302 10 false *2
*1 No. 1 Engine Room Relay Block
*2 H-LP HI Relay Holder


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

Standard Voltage:
Tester Connection Condition Specified Condition
Relay terminal 2- Body ground Always 11 to 14 V
Relay terminal 5- Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

14.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)
a.

Disconnect the A180 headlight assembly LH connector.


b.

Disconnect the A179 headlight assembly RH connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Relay terminal 3 - A180-2 (SOL) Always Below 1 Ω
Relay terminal 3 - A179-2 (SOL) Always Below 1 Ω
A180-1 (E) - Body ground Always Below 1 Ω
A179-1 (E) - Body ground Always Below 1 Ω
Relay terminal 3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

15.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK HARNESS AND CONNECTOR (H-LP HI RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the I85 main body ECU (Multiplex network body ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Relay terminal 1 - I85-22 (DIM) Always Below 1 Ω
Relay terminal 1- Body ground Always 10 kΩ or higher



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

REPAIR OR REPLACE HARNESS OR CONNECTOR