RM3660EC _59 Vehicle Exterior _080784 LIGHTING (EXT) _0600056 LIGHTING SYSTEM(except NR Series Engine) J

LIGHTING (EXT)  LIGHTING SYSTEM(except NR Series Engine)  LO-beam Headlight does not Illuminate  


DESCRIPTION

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

WIRING DIAGRAM

for TFTM Made


E479560E09
1.052,0.5 2.885,0.698 1.833,0.198 10 false from Auxiliary Battery 0.688,1.177 2.521,1.375 1.833,0.198 10 false H-LP LH 2.094,1.594 2.74,1.844 0.646,0.25 10 false H-LP LH 2.073,3.063 2.719,3.313 0.646,0.25 10 false H-LP RH 0.708,2.635 1.354,2.885 0.646,0.25 10 false H-LP RH 4.281,2.865 4.927,3.115 0.646,0.25 10 false 10A 4.021,0.885 4.667,1.135 0.646,0.25 10 false 3 2.635,0.885 2.833,1.094 0.198,0.208 10 false 1 1.99,0.906 2.188,1.115 0.198,0.208 10 false 2 1.969,1.208 2.167,1.417 0.198,0.208 10 false 5 2.646,1.177 2.844,1.385 0.198,0.208 10 false 3 5.719,0.813 6.365,1.063 0.646,0.25 10 false 8 5.667,0.99 6.01,1.302 0.344,0.313 10 false MB 6.083,0.906 6.729,1.156 0.646,0.25 10 false HRLY 2.615,3.677 3.26,3.927 0.646,0.25 10 false LO 1.885,4.094 2.531,4.344 0.646,0.25 10 false E 2.719,3.99 3.365,4.24 0.646,0.25 10 false S 1.844,4.458 3.573,4.656 1.729,0.198 10 false A159*1 5.688,3.792 6.333,4.042 0.646,0.25 10 false 13 6.771,3.625 7.031,3.875 0.26,0.25 10 false IG 6.771,5.427 7.031,5.677 0.26,0.25 10 false IG 6.042,3.885 6.688,4.135 0.646,0.25 10 false RLEW 6.042,5.698 6.688,5.948 0.646,0.25 10 false LLEW 5.688,5.594 6.031,5.792 0.344,0.198 10 false 12 5.656,5.802 6.021,6.01 0.365,0.208 10 false I86 2.719,5.771 3.365,6.021 0.646,0.25 10 false S 2.656,5.49 3.302,5.74 0.646,0.25 10 false LO 1.885,5.885 2.531,6.135 0.646,0.25 10 false E 1.844,4.604 3.792,4.927 1.948,0.323 10 false Headlight Assembly RH 1.76,6.438 3.698,6.677 1.938,0.24 10 false Headlight Assembly LH 1.958,2.677 2.156,2.885 0.198,0.208 10 false 5 1.948,2.344 2.146,2.552 0.198,0.208 10 false 2 2.656,2.615 2.854,2.823 0.198,0.208 10 false 3 2.646,2.354 2.844,2.563 0.198,0.208 10 false 1 6.042,2.365 6.688,2.615 0.646,0.25 10 false HRY2 5.667,4.01 6.146,4.25 0.479,0.24 10 false I86 5.5,6.292 7.146,6.781 1.646,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 4.281,3.021 5.76,3.469 1.479,0.448 10 false Power Distribution Box Assembly 2.938,3.583 3.219,3.802 0.281,0.219 10 false 2*1 1.271,4 1.688,4.219 0.417,0.219 10 false 1*1 1.031,1.938 2.865,2.135 1.833,0.198 10 false from Auxiliary Battery 4.021,2.333 4.667,2.583 0.646,0.25 10 false 4 5.656,2.448 6.021,2.802 0.365,0.354 10 false MB 5.708,2.25 5.927,2.438 0.219,0.188 10 false 9 1.781,6.281 3.51,6.479 1.729,0.198 10 false A160*1 2.927,5.708 3.75,5.917 0.823,0.208 10 false 5*1 2.729,7.385 5.208,7.667 2.479,0.281 10 false *2: for LED Type Turn Signal Light 2.74,7.073 5.219,7.354 2.479,0.281 10 false *1: for Bulb Type Turn Signal Light 3.198,5.708 4.021,5.917 0.823,0.208 10 false 3*2 2.938,3.896 3.76,4.104 0.823,0.208 10 false 5*1 3.208,3.896 4.031,4.104 0.823,0.208 10 false 3*2 1.302,5.76 1.719,5.979 0.417,0.219 10 false 1*1 1.573,4 1.99,4.219 0.417,0.219 10 false 4*2 1.583,5.76 2,5.979 0.417,0.219 10 false 4*2 3.219,3.583 3.5,3.802 0.281,0.219 10 false 1*2 2.927,5.417 3.208,5.635 0.281,0.219 10 false 2*1 3.177,5.417 3.458,5.635 0.281,0.219 10 false 1*2 2.354,6.281 4.083,6.479 1.729,0.198 10 false A166*2 2.427,4.469 4.156,4.667 1.729,0.198 10 false A165*2


for GTMC Made


E479560E07
1.052,0.5 2.885,0.698 1.833,0.198 10 false from Auxiliary Battery 0.688,1.177 2.521,1.375 1.833,0.198 10 false H-LP LH 2.094,1.594 2.74,1.844 0.646,0.25 10 false H-LP LH 2.073,3.063 2.719,3.313 0.646,0.25 10 false H-LP RH 0.708,2.635 1.354,2.885 0.646,0.25 10 false H-LP RH 4.281,2.865 4.927,3.115 0.646,0.25 10 false 10A 4.021,0.885 4.667,1.135 0.646,0.25 10 false 3 2.635,0.885 2.833,1.094 0.198,0.208 10 false 1 1.99,0.906 2.188,1.115 0.198,0.208 10 false 2 1.969,1.208 2.167,1.417 0.198,0.208 10 false 5 2.646,1.177 2.844,1.385 0.198,0.208 10 false 3 5.719,0.813 6.365,1.063 0.646,0.25 10 false 8 5.667,0.99 6.01,1.302 0.344,0.313 10 false MB 6.083,0.906 6.729,1.156 0.646,0.25 10 false HRLY 2.615,3.677 3.26,3.927 0.646,0.25 10 false LO 1.885,4.094 2.531,4.344 0.646,0.25 10 false E 2.719,3.99 3.365,4.24 0.646,0.25 10 false S 1.844,4.458 3.573,4.656 1.729,0.198 10 false A167 5.688,3.792 6.333,4.042 0.646,0.25 10 false 13 6.771,3.625 7.031,3.875 0.26,0.25 10 false IG 6.771,5.427 7.031,5.677 0.26,0.25 10 false IG 6.042,3.885 6.688,4.135 0.646,0.25 10 false RLEW 6.042,5.698 6.688,5.948 0.646,0.25 10 false LLEW 5.688,5.594 6.031,5.792 0.344,0.198 10 false 12 5.656,5.802 6.021,6.01 0.365,0.208 10 false I86 2.719,5.771 3.365,6.021 0.646,0.25 10 false S 2.656,5.49 3.302,5.74 0.646,0.25 10 false LO 1.885,5.885 2.531,6.135 0.646,0.25 10 false E 1.844,4.604 3.792,4.927 1.948,0.323 10 false Headlight Assembly RH 1.76,6.438 3.698,6.677 1.938,0.24 10 false Headlight Assembly LH 1.958,2.677 2.156,2.885 0.198,0.208 10 false 5 1.948,2.344 2.146,2.552 0.198,0.208 10 false 2 2.656,2.615 2.854,2.823 0.198,0.208 10 false 3 2.646,2.354 2.844,2.563 0.198,0.208 10 false 1 6.042,2.365 6.688,2.615 0.646,0.25 10 false HRY2 5.667,4.01 6.146,4.25 0.479,0.24 10 false I86 5.5,6.292 7.146,6.781 1.646,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 4.281,3.021 5.76,3.469 1.479,0.448 10 false Power Distribution Box Assembly 2.938,3.583 3.219,3.802 0.281,0.219 10 false 4 1.031,1.938 2.865,2.135 1.833,0.198 10 false from Auxiliary Battery 4.021,2.333 4.667,2.583 0.646,0.25 10 false 4 5.656,2.448 6.021,2.802 0.365,0.354 10 false MB 5.708,2.25 5.927,2.438 0.219,0.188 10 false 9 1.781,6.281 3.51,6.479 1.729,0.198 10 false A168 2.927,5.708 3.75,5.917 0.823,0.208 10 false 2 2.938,3.896 3.76,4.104 0.823,0.208 10 false 2 1.667,5.76 2.083,5.979 0.417,0.219 10 false 5 2.927,5.417 3.208,5.635 0.281,0.219 10 false 4 1.667,4.01 2.083,4.229 0.417,0.219 10 false 5


CAUTION / NOTICE / HINT

NOTICE:
·

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

·

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

*: w/ Smart Entry and Start System




PROCEDURE

1.CHECK VEHICLE TYPE
a.

Check vehicle type.


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



A

2.PERFORM ACTIVE TEST USING GTS

B

31.PERFORM ACTIVE TEST USING GTS
2.PERFORM ACTIVE TEST USING GTS
a.

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


b.

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
Headlight Relay / Light Power Supply Relay Headlights OFF or ON -
Body Electrical > Main Body > Active Test
Tester Display
Headlight Relay / Light Power Supply Relay
50004 449 50
OK:

Low beam headlights illuminate.



Result:
Result Proceed to
OK A
NG (LH side low beam light does not illuminate.) (for Bulb Type Turn Signal Light) B
NG (RH side low beam light does not illuminate.) (for Bulb Type Turn Signal Light) C
NG (LH side low beam light does not illuminate.) (for LED Type Turn Signal Light) D
NG (RH side low beam light does not illuminate.) (for LED Type Turn Signal Light) E



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (except NR Series Engine)>PROBLEM SYMPTOMS TABLE


B

3.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

C

10.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)

D

17.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

E

24.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
3.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.

Disconnect the A160 headlight assembly LH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A160-2 (LO) - Body ground Light control switch in head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

NG

5.INSPECT H-LP LH RELAY
4.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A160-1 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for TFTM Made)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT H-LP LH RELAY

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

Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

NG

REPLACE H-LP LH RELAY

6.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A160-2 (LO) Always Below 1 Ω
3 (H-LP LH relay) - Body ground Always 10 kΩ or higher
A160-2 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP LH relay) - 10A-3 Always Below 1 Ω
1 (H-LP LH relay) - Body ground Always 10 kΩ or higher
10A-3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

9.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-3 - MB-8 (HRLY) 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


10.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.

Disconnect the A159 headlight assembly RH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A159-2 (LO) - Body ground Light control switch in head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

11.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

NG

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

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

Standard Resistance:
Tester Connection Condition Specified Condition
A159-1 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for TFTM Made)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.INSPECT H-LP RH RELAY

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

Result:
Proceed to
OK
NG



OK

13.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)

NG

REPLACE H-LP LH RELAY

13.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A159-2 (LO) Always Below 1 Ω
3 (H-LP RH relay) - Body ground Always 10 kΩ or higher
A159-2 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

14.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

15.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP RH relay) - 10A-4 Always Below 1 Ω
1 (H-LP RH relay) - Body ground Always 10 kΩ or higher
10A-4 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

16.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-4 - MB-9 (HRY2) 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


17.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.

Disconnect the A166 headlight assembly LH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A166-1 (LO) - Body ground Light control switch in head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

18.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

NG

19.INSPECT H-LP LH RELAY
18.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A166-4 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for TFTM Made)>DISASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

19.INSPECT H-LP LH RELAY

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

Result:
Proceed to
OK
NG



OK

20.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

NG

REPLACE H-LP LH RELAY

20.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A166-1 (LO) Always Below 1 Ω
3 (H-LP LH relay) - Body ground Always 10 kΩ or higher
A166-1 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

21.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

21.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

22.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

22.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP LH relay) - 10A-3 Always Below 1 Ω
1 (H-LP LH relay) - Body ground Always 10 kΩ or higher
10A-3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

23.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

23.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-3 - MB-8 (HRLY) 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


24.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.

Disconnect the A165 headlight assembly RH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A165-1 (LO) - Body ground Light control switch in head position Below 1 V



Result:
Proceed to
OK
NG



OK

25.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

NG

26.INSPECT H-LP RH RELAY
25.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A165-4 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for TFTM Made)>DISASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

26.INSPECT H-LP RH RELAY

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

Result:
Proceed to
OK
NG



OK

27.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)

NG

REPLACE H-LP RH RELAY

27.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A165-1 (LO) Always Below 1 Ω
3 (H-LP RH relay) - Body ground Always 10 kΩ or higher
A165-1 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

28.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

28.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

29.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

29.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP RH relay) - 10A-4 Always Below 1 Ω
1 (H-LP RH relay) - Body ground Always 10 kΩ or higher
10A-4 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

30.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

30.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-4 - MB-9 (HRY2) 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


31.PERFORM ACTIVE TEST USING GTS
a.

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


b.

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
Headlight Relay / Light Power Supply Relay Headlights OFF or ON -
Body Electrical > Main Body > Active Test
Tester Display
Headlight Relay / Light Power Supply Relay
50004 449 50
OK:

Low beam headlights illuminate.



Result:
Result Proceed to
OK A
NG (LH side low beam light does not illuminate.) B
NG (RH side low beam light does not illuminate.) C



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (except NR Series Engine)>PROBLEM SYMPTOMS TABLE


B

32.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

C

39.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
32.INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.

Disconnect the A168 headlight assembly LH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A168-4 (LO) - Body ground Light control switch in head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

33.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

NG

34.INSPECT H-LP LH RELAY
33.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A168-5 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for GTMC Made)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

34.INSPECT H-LP LH RELAY

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

Result:
Proceed to
OK
NG



OK

35.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

NG

REPLACE H-LP LH RELAY

35.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A168-4 (LO) Always Below 1 Ω
3 (H-LP LH relay) -Body ground Always 10 kΩ or higher
A168-4 (LO) -Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

36.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

36.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

37.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

37.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP LH relay) - 10A-3 Always Below 1 Ω
1 (H-LP LH relay) - Body ground Always 10 kΩ or higher
10A-3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

38.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

38.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-3 - MB-8 (HRLY) 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


39.INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.

Disconnect the A167 headlight assembly RH connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A167-4 (LO) - Body ground Light control switch in head position 11 to 14 V



Result:
Proceed to
OK
NG



OK

40.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

NG

41.INSPECT H-LP RH RELAY
40.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A167-5 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for GTMC Made)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

41.INSPECT H-LP RH RELAY

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

Result:
Proceed to
OK
NG



OK

42.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)

NG

REPLACE H-LP RH RELAY

42.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A167-4 (LO) Always Below 1 Ω
3 (H-LP RH relay) - Body ground Always 10 kΩ or higher
A167-4 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

43.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

43.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - BATTERY)
a.

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

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



Result:
Proceed to
OK
NG



OK

44.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

44.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 10A 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 (H-LP RH relay) - 10A-4 Always Below 1 Ω
1 (H-LP RH relay) - Body ground Always 10 kΩ or higher
10A-4 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

45.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

45.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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


b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-4 - MB-9 (HRY2) 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