RM36D0EC _59 Vehicle Exterior _083096 LIGHTING (EXT) _0402622 LIGHTING SYSTEM C

LIGHTING (EXT)  LIGHTING SYSTEM  B243900  Headlight LH Circuit  B243A00  Headlight RH Circuit  


DESCRIPTION

These DTCs are stored when the low beam headlights do not illuminate, or a communication malfunction is detected between the light control LED ECU and main body ECU (multiplex network body ECU).

HINT:

DTC B243900 or DTC B243A00 may also be stored if a headlight cooling fan is malfunctioning. In this case, the light control LED ECU will dim or turn off the malfunctioning low beam headlight.


DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B243900 Headlight LH Circuit
Detection condition:

All of the following conditions are met:

-

Ignition switch ON

-

Low beam headlights on



Malfunction Status:

Any of the following conditions is met:

-

Headlight assembly LH malfunction

-

Headlight assembly LH power source and signal malfunction



Malfunction Time:

10 seconds or more


·

Headlight assembly LH

·

H-LP LH relay

·

Power distribution box assembly

·

Main body ECU (multiplex network body ECU)

·

Harness or connector


Main Body
B243A00 Headlight RH Circuit
Detection condition:

All of the following conditions are met:

-

Ignition switch ON

-

Low beam headlights on



Malfunction Status:

Any of the following conditions is met:

-

Headlight assembly RH malfunction

-

Headlight assembly RH power source and signal malfunction



Malfunction Time:

10 seconds or more


·

Headlight assembly RH

·

H-LP RH relay

·

Main body ECU (multiplex network body ECU)

·

Harness or connector


Main Body

WIRING DIAGRAM

for Triple Beam Headlight


E547154E05
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 6E 4.021,0.885 4.667,1.135 0.646,0.25 10 false 6 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 5.74,1 5.958,1.188 0.219,0.188 10 false A 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 1.49,6.292 3.219,6.49 1.729,0.198 10 false A62*1, A110*2 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 5.615,5.802 5.979,6.01 0.365,0.208 10 false G168 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 1.438,4.667 3.385,4.99 1.948,0.323 10 false Headlight Assembly RH 1.51,6.469 3.448,6.708 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 5.625,4.01 6.104,4.25 0.479,0.24 10 false G168 5.5,6.281 7.146,6.771 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 3.135,3.802 0.198,0.219 10 false 1 2.938,3.885 3.76,4.094 0.823,0.208 10 false 6*1, 7*2 1.198,3.979 1.833,4.188 0.635,0.208 10 false 2*1, 3*2 2.938,5.375 3.135,5.583 0.198,0.208 10 false 1 1.031,1.938 2.865,2.135 1.833,0.198 10 false from Auxiliary Battery 3.969,2.344 4.615,2.594 0.646,0.25 10 false 10 5.729,2.448 5.948,2.635 0.219,0.188 10 false A 5.708,2.25 5.927,2.438 0.219,0.188 10 false 9 1.406,4.5 3.135,4.698 1.729,0.198 10 false A61*1, A109*2 1.25,5.781 1.885,5.99 0.635,0.208 10 false 2*1, 3*2 2.938,5.698 3.76,5.906 0.823,0.208 10 false 6*1, 7*2 0.563,7.292 2.5,7.531 1.938,0.24 10 false *1: for SFTM Made 2.323,7.313 4.26,7.552 1.938,0.24 10 false *2: for GTMC Made


for Single Beam Headlight


E547154E06
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 6E 4.021,0.885 4.667,1.135 0.646,0.25 10 false 6 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 5.74,1 5.958,1.188 0.219,0.188 10 false A 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 1.531,4.479 3.26,4.677 1.729,0.198 10 false A103 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 5.615,5.802 5.979,6.01 0.365,0.208 10 false G168 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 1.531,4.656 3.479,4.979 1.948,0.323 10 false Headlight Assembly RH 1.573,6.458 3.51,6.698 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 5.615,4.01 6.094,4.25 0.479,0.24 10 false G168 5.5,6.281 7.146,6.771 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 2.958,3.594 3.156,3.813 0.198,0.219 10 false 1 2.969,3.885 3.792,4.094 0.823,0.208 10 false 8*1, 7*2 1.219,3.99 1.813,4.229 0.594,0.24 10 false 5*1, 2*2 2.958,5.396 3.156,5.604 0.198,0.208 10 false 1 1.031,1.938 2.865,2.135 1.833,0.198 10 false from Auxiliary Battery 3.969,2.344 4.615,2.594 0.646,0.25 10 false 10 5.729,2.448 5.948,2.635 0.219,0.188 10 false A 5.708,2.25 5.927,2.438 0.219,0.188 10 false 9 1.573,6.271 3.302,6.469 1.729,0.198 10 false A104 2.948,5.688 3.771,5.896 0.823,0.208 10 false 8*1, 7*2 1.219,5.771 1.813,6.01 0.594,0.24 10 false 5*1, 2*2 0.5,7.365 2.438,7.604 1.938,0.24 10 false *1: for SFTM Made 2.125,7.354 4.063,7.594 1.938,0.24 10 false *2: for GTMC Made


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.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.


d.

Turn the GTS on.


e.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes
50001 449
OK:

DTC B243900 and B243A00 are not output.



Result:
Result Proceed to
OK A
NG (DTC B243900 is output) B
NG (DTC B243A00 is output) C



A

USE SIMULATION METHOD TO CHECK

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


B

3.CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

C

12.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
3.CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.
E421878C36
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.896,2.844 0.479,0.24 1.427,2.292 1.906,2.531 0.479,0.24 0.719,1.063 1.385,1.271 true 0.729,3.115 1.385,3.563 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.354 1.938,0.552 0.396,0.198 10 false A62 1.49,2.635 1.885,2.833 0.396,0.198 10 false A104 1.99,2.344 2.302,2.542 0.313,0.198 10 false *B 0.49,0.969 0.802,1.167 0.313,0.198 10 false LO 0.5,3.021 0.813,3.219 0.313,0.198 10 false LO 1.49,2.323 1.885,2.521 0.396,0.198 10 false A110 1.99,2.604 2.302,2.802 0.313,0.198 10 false *C
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight
*a Front view of wire harness connector
(to Headlight Assembly LH)


Disconnect the headlight assembly LH connector.


b.

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

Standard Voltage:
for Triple Beam Headlight, SFTM Made
Tester Connection Switch Condition Specified Condition
A62-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

for Triple Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A110-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

for Single Beam Headlight
Tester Connection Switch Condition Specified Condition
A104-1 (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

7.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)
4.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.
E421878C35
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.865,2.844 0.448,0.24 1.417,2.323 1.865,2.563 0.448,0.24 1.01,0.771 1.677,1.271 true 0.656,3.146 1.542,3.531 true 0.729,4.25 1.375,3.729 true 1.792,3.542 2.427,3.094 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.354 1.938,0.552 0.396,0.198 10 false A62 1.49,2.646 1.885,2.844 0.396,0.198 10 false A104 1.917,2.656 2.688,2.979 0.771,0.323 10 false *C, *D 0.76,0.688 1.073,0.885 0.313,0.198 10 false E 0.219,3.021 0.823,3.375 0.604,0.354 10 false E (*D) 1.49,2.365 1.885,2.563 0.396,0.198 10 false A110 1.917,2.375 2.229,2.573 0.313,0.198 10 false *B 2.531,3.01 2.979,3.313 0.448,0.302 10 false E (*B) 0.302,4.177 0.75,4.479 0.448,0.302 10 false E (*C)
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight, SFTM Made
*D for Single Beam Headlight, GTMC Made
*a Front view of wire harness connector
(to Headlight Assembly LH)


Disconnect the headlight assembly LH connector.


b.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A62-2 (E) - Body ground Always Below 1 Ω

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A110-3 (E) - Body ground Always Below 1 Ω

for Single Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A104-5 (E) - Body ground Always Below 1 Ω

for Single Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A104-2 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)
a.
E421878C40
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.865,2.844 0.448,0.24 1.417,2.302 1.865,2.542 0.448,0.24 2.615,2.24 2.073,1.646 true 2.146,4.354 1.781,3.781 true 2.677,3.375 1.958,3.708 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.354 1.938,0.552 0.396,0.198 10 false A62 1.479,2.635 1.875,2.833 0.396,0.198 10 false A104 1.917,2.656 2.667,3.042 0.75,0.385 10 false *C, *D 2.708,2.26 3.021,2.458 0.313,0.198 10 false S 2.198,4.302 2.979,4.604 0.781,0.302 10 false S (*B, *D) 1.479,2.344 1.875,2.542 0.396,0.198 10 false A110 1.906,2.333 2.219,2.531 0.313,0.198 10 false *B 2.75,3.281 3.396,3.698 0.646,0.417 10 false S (*C)
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight, SFTM Made
*D for Single Beam Headlight, GTMC Made
*a Front view of wire harness connector
(to Headlight Assembly LH)


Disconnect the headlight assembly LH connector.


b.

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

Standard Voltage:
for Triple Beam Headlight, SFTM Made
Tester Connection Switch Condition Specified Condition
A62-6 (S) - Body ground Ignition switch ON 11 to 14 V

for Triple Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A110-7 (S) - Body ground Ignition switch ON 11 to 14 V

for Single Beam Headlight, SFTM Made
Tester Connection Switch Condition Specified Condition
A104-8 (S) - Body ground Ignition switch ON 11 to 14 V

for Single Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A104-7 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

for Single Beam Headlight:

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for Single Beam Headlight)>REMOVAL

for Triple Beam Headlight:

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for Triple Beam Headlight)>REMOVAL


NG

6.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
6.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the A62*1, A110*2 or A104*3 headlight assembly LH connector.

*1: for Triple Beam Headlight, SFTM Made

*2: for Triple Beam Headlight, GTMC Made

*3: for Single Beam Headlight



b.

Disconnect the G168 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A62-6 (S) - G43-14 (LLEW) Always Below 1 Ω
A62-6 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A110-7 (S) - G43-14 (LLEW) Always Below 1 Ω
A110-7 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

for Single Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A104-8 (S) - G43-14 (LLEW) Always Below 1 Ω
A104-8 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

for Single Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A104-7 (S) - G43-14 (LLEW) Always Below 1 Ω
A104-7 (S) or G43-14 (LLEW) - 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

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

Remove the H-LP LH relay.


b.

Disconnect the A62*1, A110*2 or A104*3 headlight assembly LH connector.

*1: for Triple Beam Headlight, SFTM Made

*2: for Triple Beam Headlight, GTMC Made

*3: for Single Beam Headlight



c.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A62-1 (LO) Always Below 1 Ω
3 (H-LP LH relay) or A62-1 (LO) - Body ground Always 10 kΩ or higher

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A110-1 (LO) Always Below 1 Ω
3 (H-LP LH relay) or A110-1 (LO) - Body ground Always 10 kΩ or higher

for Single Beam Headlight
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A104-1 (LO) Always Below 1 Ω
3 (H-LP LH relay) or A104-1 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.INSPECT H-LP LH RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.INSPECT H-LP LH RELAY

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE H-LP LH RELAY

9.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - BATTERY)
a.
B340809C08
0.115,0.083 0.427,0.281 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to H-LP LH Relay)


Remove the H-LP LH relay.


b.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Remove the H-LP LH relay.


b.

Disconnect the 6E power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (H-LP LH relay) - 6E-6 Always Below 1 Ω
1 (H-LP LH relay) or 6E-6 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

11.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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

E443881C29
1.438,0.073 1.854,0.333 0.417,0.26 5.313,0.302 5.729,0.563 0.417,0.26 4.396,1.302 4.552,1.302 4.552,1.302 4.792,0.927 true 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a 1.573,0.125 1.885,0.323 0.313,0.198 10 false 6E 5.448,0.354 5.76,0.552 0.313,0.198 10 false A 4,1.198 4.615,1.396 0.615,0.198 10 false HRLY
*a Component without harness connected
(Power Distribution Box Assembly) 		- -



b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6E-6 - A-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


12.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.
E421878C37
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.865,2.844 0.448,0.24 1.417,2.302 1.865,2.542 0.448,0.24 0.719,1.063 1.385,1.271 true 0.729,3.115 1.385,3.563 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.354 1.938,0.552 0.396,0.198 10 false A61 1.479,2.646 1.875,2.844 0.396,0.198 10 false A103 1.917,2.656 2.229,2.854 0.313,0.198 10 false *C 0.49,0.969 0.802,1.167 0.313,0.198 10 false LO 0.5,3.021 0.813,3.219 0.313,0.198 10 false LO 1.479,2.354 1.875,2.552 0.396,0.198 10 false A109 1.938,2.344 2.25,2.542 0.313,0.198 10 false *B
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight
*a Front view of wire harness connector
(to Headlight Assembly RH)


Disconnect the headlight assembly RH connector.


b.

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

Standard Voltage:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A61-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

for Triple Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A109-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

for Single Beam Headlight
Tester Connection Switch Condition Specified Condition
A103-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

16.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)
13.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)
a.
E421878C39
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.865,2.844 0.448,0.24 1.417,2.323 1.865,2.563 0.448,0.24 1.01,0.771 1.677,1.271 true 0.656,3.146 1.542,3.531 true 0.729,4.25 1.375,3.729 true 1.792,3.542 2.427,3.094 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.354 1.938,0.552 0.396,0.198 10 false A61 1.49,2.646 1.885,2.844 0.396,0.198 10 false A103 1.917,2.656 2.688,2.979 0.771,0.323 10 false *C, *D 0.76,0.688 1.073,0.885 0.313,0.198 10 false E 0.219,3.021 0.823,3.375 0.604,0.354 10 false E (*D) 1.49,2.365 1.885,2.563 0.396,0.198 10 false A109 1.917,2.375 2.229,2.573 0.313,0.198 10 false *B 2.531,3.01 2.979,3.313 0.448,0.302 10 false E (*B) 0.302,4.177 0.75,4.479 0.448,0.302 10 false E (*C)
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight, SFTM Made
*D for Single Beam Headlight, GTMC Made
*a Front view of wire harness connector
(to Headlight Assembly RH)


Disconnect the headlight assembly RH connector.


b.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A61-2 (E) - Body ground Always Below 1 Ω

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A109-3 (E) - Body ground Always Below 1 Ω

for Single Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A103-5 (E) - Body ground Always Below 1 Ω

for Single Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A103-2 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

14.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)
a.
E421878C41
1.438,0.323 1.885,0.563 0.448,0.24 1.417,2.604 1.865,2.844 0.448,0.24 1.417,2.302 1.865,2.542 0.448,0.24 2.615,2.24 2.073,1.646 true 2.146,4.354 1.781,3.781 true 2.677,3.375 1.958,3.708 true 0.083,0.125 0.396,0.323 0.313,0.198 10 false *a 1.958,0.365 2.271,0.563 0.313,0.198 10 false *A 1.542,0.375 1.938,0.573 0.396,0.198 10 false A61 1.479,2.635 1.875,2.833 0.396,0.198 10 false A103 1.917,2.656 2.667,3.042 0.75,0.385 10 false *C, *D 2.708,2.26 3.021,2.458 0.313,0.198 10 false S 2.198,4.302 2.979,4.604 0.781,0.302 10 false S (*B, *D) 1.479,2.344 1.875,2.542 0.396,0.198 10 false A109 1.906,2.333 2.219,2.531 0.313,0.198 10 false *B 2.75,3.281 3.396,3.698 0.646,0.417 10 false S (*C)
*A for Triple Beam Headlight, SFTM Made
*B for Triple Beam Headlight, GTMC Made
*C for Single Beam Headlight, SFTM Made
*D for Single Beam Headlight, GTMC Made
*a Front view of wire harness connector
(to Headlight Assembly RH)


Disconnect the headlight assembly RH connector.


b.

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

Standard Voltage:
for Triple Beam Headlight, SFTM Made
Tester Connection Switch Condition Specified Condition
A61-6 (S) - Body ground Ignition switch ON 11 to 14 V

for Triple Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A109-7 (S) - Body ground Ignition switch ON 11 to 14 V

for Single Beam Headlight, SFTM Made
Tester Connection Switch Condition Specified Condition
A103-8 (S) - Body ground Ignition switch ON 11 to 14 V

for Single Beam Headlight, GTMC Made
Tester Connection Switch Condition Specified Condition
A103-7 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

for Single Beam Headlight:

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for Single Beam Headlight)>REMOVAL

for Triple Beam Headlight:

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for Triple Beam Headlight)>REMOVAL


NG

15.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
15.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the A61*1, A109*2 or A103*3 headlight assembly RH connector.

*1: for Triple Beam Headlight, SFTM Made

*2: for Triple Beam Headlight, GTMC Made

*3: for Single Beam Headlight



b.

Disconnect the G168 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A61-6 (S) - G43-15 (RLEW) Always Below 1 Ω
A61-6 (S) or G43-15 (RLEW) - Body ground Always 10 kΩ or higher

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A109-7 (S) - G43-15 (RLEW) Always Below 1 Ω
A109-7 (S) or G43-15 (RLEW) - Body ground Always 10 kΩ or higher

for Single Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
A103-8 (S) - G43-15 (RLEW) Always Below 1 Ω
A103-8 (S) or G43-15 (RLEW) - Body ground Always 10 kΩ or higher

for Single Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
A103-7 (S) - G43-15 (RLEW) Always Below 1 Ω
A103-7 (S) or G43-15 (RLEW) - 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

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

Remove the H-LP RH relay.


b.

Disconnect the A61*1, A109*2 or A103*3 headlight assembly RH connector.

*1: for Triple Beam Headlight, SFTM Made

*2: for Triple Beam Headlight, GTMC Made

*3: for Single Beam Headlight



c.

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

Standard Resistance:
for Triple Beam Headlight, SFTM Made
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A61-1 (LO) Always Below 1 Ω
3 (H-LP RH relay) or A61-1 (LO) - Body ground Always 10 kΩ or higher

for Triple Beam Headlight, GTMC Made
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A109-1 (LO) Always Below 1 Ω
3 (H-LP RH relay) or A109-1 (LO) - Body ground Always 10 kΩ or higher

for Single Beam Headlight
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A103-1 (LO) Always Below 1 Ω
3 (H-LP RH relay) or A103-1 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

17.INSPECT H-LP RH RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

17.INSPECT H-LP RH RELAY

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE H-LP RH RELAY

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

Remove the H-LP RH relay.


b.
B340809C08
0.115,0.083 0.427,0.281 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to H-LP RH Relay)


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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Remove the H-LP RH relay.


b.

Disconnect the 6E power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (H-LP RH relay) - 6E-10 Always Below 1 Ω
1 (H-LP RH relay) or 6E-10 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

20.CHECK POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

20.CHECK POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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

E443881C30
1.438,0.073 1.854,0.333 0.417,0.26 5.313,0.302 5.729,0.563 0.417,0.26 4.51,1.302 4.667,1.302 4.667,1.302 4.906,0.927 true 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a 1.573,0.125 1.885,0.323 0.313,0.198 10 false 6E 5.448,0.354 5.76,0.552 0.313,0.198 10 false A 4.094,1.188 4.708,1.385 0.615,0.198 10 false HRY2
*a Component without harness connected
(Power Distribution Box Assembly) 		- -



b.

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


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6E-10 - A-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