RM38T0EC _59 Vehicle Exterior _112294 LIGHTING (EXT) _0510962 LIGHTING SYSTEM C

LIGHTING (EXT)  LIGHTING SYSTEM  B243949  Headlight LH Circuit Internal Electronic Failure  B243A49  Headlight RH Circuit Internal Electronic Failure  


DESCRIPTION

The headlight assembly internally boost the power supply voltage to ensure a constant supplied current for the low beam LED of their respective headlight.

These DTCs are also output when the main body ECU (multiplex network body ECU) detects malfunctions while monitoring the applied voltage.

DTC No. Detection Item DTC Detection Condition Trouble Area
B243949 Headlight LH Circuit Internal Electronic Failure
Detection condition:

Ignition switch is to ON, low beam headlights illuminated


Malfunction status:
·

Headlight assembly LH malfunction

·

Headlight assembly LH power source and signal malfunction


Malfunction duration:

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


B243A49 Headlight RH Circuit Internal Electronic Failure
Detection condition:

Ignition switch is to ON, low beam headlights illuminated


Malfunction status:
·

Headlight assembly RH malfunction

·

Headlight assembly RH power source and signal malfunction


Malfunction duration:

10 seconds or more


·

Headlight assembly RH

·

H-LP RH relay

·

Power distribution box assembly

·

Main body ECU (multiplex network body ECU)

·

Harness or connector



WIRING DIAGRAM

for TFTM Made


E479560E03
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 8E 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 5.667,0.99 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 A175 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 3.135,3.802 0.198,0.219 10 false 4 2.938,3.885 3.76,4.094 0.823,0.208 10 false 1 1.708,4 1.885,4.198 0.177,0.198 10 false 2 2.938,5.375 3.135,5.583 0.198,0.208 10 false 4 1.698,5.76 1.833,5.958 0.135,0.198 10 false 2 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 5.656,2.448 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 1.781,6.271 3.51,6.469 1.729,0.198 10 false A176 2.927,5.708 3.75,5.917 0.823,0.208 10 false 1


for GTMC Made


E479560E04
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 8E 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 5.667,1.01 6.01,1.313 0.344,0.302 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 A175 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 5.667,5.813 6.031,6.021 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 5.677,4.021 6.156,4.26 0.479,0.24 10 false I86 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 4 2.938,3.885 3.76,4.094 0.823,0.208 10 false 1 1.698,4 1.875,4.198 0.177,0.198 10 false 6 2.938,5.375 3.135,5.583 0.198,0.208 10 false 4 1.677,5.76 1.813,5.958 0.135,0.198 10 false 6 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 5.667,2.448 5.969,2.708 0.302,0.26 10 false MB 5.708,2.25 5.927,2.438 0.219,0.188 10 false 9 1.781,6.271 3.51,6.469 1.729,0.198 10 false A176 2.938,5.708 3.76,5.917 0.823,0.208 10 false 1


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
Body Electrical > Main Body > Clear DTCs
50002 449
Result:
Proceed to
NEXT



NEXT

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

Check for DTCs.

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

DTC B243900 and B243A00 are not output.



Result:
Result Proceed to
DTCs are not output A
B243949 is output B
B243A49 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 VEHICLE TYPE

C

17.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 HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

B

8.CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
4.CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.
E472234C03
1.375,0.156 1.958,0.438 0.583,0.281 1.896,1.094 2.385,0.698 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.521,0.229 1.927,0.469 0.406,0.24 10 false A176 2.448,0.563 2.854,0.802 0.406,0.24 10 false LO
*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:
Tester Connection Switch Condition Specified Condition
A176-4 (LO) - Body ground Light control switch in HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

12.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
5.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.
E472234C04
1.375,0.156 1.958,0.438 0.583,0.281 1.604,1.073 0.99,0.573 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A176 0.854,0.427 1.26,0.667 0.406,0.24 10 false E
*a Front view of wire harness connector
(to Headlight Assembly LH)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A176-2 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)
a.
E472234C06
1.375,0.156 1.958,0.438 0.583,0.281 1.469,1.083 0.865,0.615 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A176 0.74,0.458 1.146,0.698 0.406,0.24 10 false S
*a Front view of wire harness connector
(to Headlight Assembly LH)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A176-1 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

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


NG

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

Disconnect the I86 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
A176-1 (S) - I86-12 (LLEW) Always Below 1 Ω
A176-1 (S) - 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

8.CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)
a.
E472234C03
1.375,0.156 1.958,0.438 0.583,0.281 1.896,1.094 2.385,0.698 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.521,0.229 1.927,0.469 0.406,0.24 10 false A176 2.448,0.563 2.854,0.802 0.406,0.24 10 false LO
*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:
Tester Connection Switch Condition Specified Condition
A176-4 (LO) - Body ground Light control switch in HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

12.CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
9.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)
a.
E472234C10
1.375,0.156 1.958,0.438 0.583,0.281 1.177,1.802 1.604,1.24 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A176 1.031,1.792 1.438,2.031 0.406,0.24 10 false E
*a Front view of wire harness connector
(to Headlight Assembly LH)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A176-6 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

10.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE)
a.
E472234C06
1.375,0.156 1.958,0.438 0.583,0.281 1.469,1.083 0.865,0.615 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A176 0.74,0.458 1.146,0.698 0.406,0.24 10 false S
*a Front view of wire harness connector
(to Headlight Assembly LH)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A176-1 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY LH

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


NG

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

Disconnect the I86 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
A176-1 (S) - I86-12 (LLEW) Always Below 1 Ω
A176-1 (S) - 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

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

Remove the H-LP LH relay.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP LH relay) - A176-4 (LO) Always Below 1 Ω
3 (H-LP LH relay) - Body ground Always 10 kΩ or higher
A176-4 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

13.INSPECT H-LP LH RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.INSPECT H-LP LH RELAY

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE H-LP LH RELAY

14.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)


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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the 8E 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) - 8E-6 Always Below 1 Ω
1 (H-LP LH relay) - Body ground Always 10 kΩ or higher
8E-6 - 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

E444782C21
1.604,0.208 2.021,0.458 0.417,0.25 4.646,0.417 5.063,0.667 0.417,0.25 4.531,1.323 4.365,0.938 true 0.125,0.104 0.427,0.333 0.302,0.229 10 false *a 1.729,0.25 2.042,0.448 0.313,0.198 10 false 8E 4.75,0.458 5.063,0.656 0.313,0.198 10 false MB 4.469,1.354 4.896,1.594 0.427,0.24 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
8E-6 - MB-8 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.CHECK VEHICLE TYPE
a.

Check vehicle type.


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



A

18.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)

B

22.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
18.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.
E472234C07
1.375,0.156 1.958,0.438 0.583,0.281 1.896,1.094 2.385,0.698 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.521,0.229 1.927,0.469 0.406,0.24 10 false A175 2.448,0.563 2.854,0.802 0.406,0.24 10 false LO
*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:
Tester Connection Switch Condition Specified Condition
A175-4 (LO) - Body ground Light control switch in HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

26.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
19.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)
a.
E472234C08
1.375,0.156 1.958,0.438 0.583,0.281 1.604,1.073 0.99,0.573 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A175 0.854,0.427 1.26,0.667 0.406,0.24 10 false E
*a Front view of wire harness connector
(to Headlight Assembly RH)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A175-2 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

20.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

20.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)
a.
E472234C09
1.375,0.156 1.958,0.438 0.583,0.281 1.469,1.083 0.865,0.615 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A175 0.74,0.458 1.146,0.698 0.406,0.24 10 false S
*a Front view of wire harness connector
(to Headlight Assembly RH)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A175-1 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

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


NG

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

Disconnect the I86 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
A175-1 (S) - I86-13 (RLEW) Always Below 1 Ω
A175-1 (S) - 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

22.CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)
a.
E472234C07
1.375,0.156 1.958,0.438 0.583,0.281 1.896,1.094 2.385,0.698 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.521,0.229 1.927,0.469 0.406,0.24 10 false A175 2.448,0.563 2.854,0.802 0.406,0.24 10 false LO
*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:
Tester Connection Switch Condition Specified Condition
A175-4 (LO) - Body ground Light control switch in HEAD position 11 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

26.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
23.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)
a.
E472234C08
1.375,0.156 1.958,0.438 0.583,0.281 1.604,1.073 0.99,0.573 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A175 0.854,0.427 1.26,0.667 0.406,0.24 10 false E
*a Front view of wire harness connector
(to Headlight Assembly RH)


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

Standard Resistance:
Tester Connection Condition Specified Condition
A175-6 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

24.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

24.CHECK HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE)
a.
E472234C09
1.375,0.156 1.958,0.438 0.583,0.281 1.469,1.083 0.865,0.615 true 0.104,0.083 0.417,0.24 0.313,0.156 10 false *a 1.51,0.219 1.917,0.458 0.406,0.24 10 false A175 0.74,0.458 1.146,0.698 0.406,0.24 10 false S
*a Front view of wire harness connector
(to Headlight Assembly RH)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A175-1 (S) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ASSEMBLY RH

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


NG

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

Disconnect the I86 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
A175-1 (S) - I86-13 (RLEW) Always Below 1 Ω
A175-1 (S) - 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

26.CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
a.

Remove the H-LP RH relay.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (H-LP RH relay) - A175-4 (LO) Always Below 1 Ω
3 (H-LP RH relay) - Body ground Always 10 kΩ or higher
A175-4 (LO) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

27.INSPECT H-LP RH RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

27.INSPECT H-LP RH RELAY

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

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE H-LP RH RELAY

28.CHECK HARNESS AND CONNECTOR (H-LP RH 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 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

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 8E 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) - 8E-10 Always Below 1 Ω
1 (H-LP RH relay) - Body ground Always 10 kΩ or higher
8E-10 - 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

E444782C22
1.604,0.208 2.021,0.458 0.417,0.25 4.646,0.417 5.063,0.667 0.417,0.25 4.604,1.323 4.438,0.938 true 0.125,0.104 0.427,0.333 0.302,0.229 10 false *a 1.729,0.25 2.042,0.448 0.313,0.198 10 false 8E 4.75,0.458 5.063,0.656 0.313,0.198 10 false MB 4.552,1.375 4.979,1.615 0.427,0.24 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
8E-10 - 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