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

LIGHTING (EXT) LIGHTING SYSTEM(except NR Series Engine) Headlight Dimmer Switch Circuit

DESCRIPTION

The steering sensor receives the following switch information:

Light control switch in tail, head or AUTO position

Dimmer switch in high, low or high flash (pass) position

Fog light switch in front*, rear or off position

*: w/ Front Fog Light

WIRING DIAGRAM

2.698,0.313 3.313,0.51 0.615,0.198 10 false HEAD 3.219,0.448 3.677,0.646 0.458,0.198 10 false I46*1 5.302,0.323 5.917,0.521 0.615,0.198 10 false HEAD 5.667,0.177 5.979,0.375 0.313,0.198 10 false +B 5.031,0.323 5.344,0.521 0.313,0.198 10 false 26 3.313,0.219 3.469,0.417 0.156,0.198 10 false 7 1.281,1.688 1.74,1.885 0.458,0.198 10 false 5 V 4.938,0.833 5.396,1.031 0.458,0.198 10 false I85 4.938,0.99 6.604,1.927 1.667,0.938 10 false Main Body ECU (Multiplex Network Body ECU) 6.208,2.021 6.521,2.219 0.313,0.198 10 false HU 5.865,2.021 6.177,2.219 0.313,0.198 10 false HF 6.583,2.021 6.896,2.219 0.313,0.198 10 false EL 5.063,2.604 6.438,2.802 1.375,0.198 10 false High Beam 5.073,2.406 6.302,2.604 1.229,0.198 10 false Low Beam 5.083,2.219 6.156,2.417 1.073,0.198 10 false PASSING 4.896,2.833 6.885,3.031 1.99,0.198 10 false Dimmer Switch 4.469,4.073 4.781,4.271 0.313,0.198 10 false HU 4.458,3.417 4.771,3.615 0.313,0.198 10 false HF 4.083,3.531 4.385,3.802 0.302,0.271 10 false z19 4.167,3.333 4.385,3.521 0.219,0.188 10 false 6 4.156,3.958 4.417,4.177 0.26,0.219 10 false 1 3.302,3.979 3.458,4.177 0.156,0.198 10 false 6 3.302,3.323 3.458,3.521 0.156,0.198 10 false 7 3.25,3.531 3.563,3.729 0.313,0.198 10 false z17 2.771,5.708 3.115,6.073 0.344,0.365 10 false BFG 3,6.375 3.458,6.573 0.458,0.198 10 false B 3.271,5.604 3.583,5.802 0.313,0.198 10 false 11 4.104,6.271 4.344,6.479 0.24,0.208 10 false 13 3.281,6.271 3.594,6.469 0.313,0.198 10 false 12 4.156,5.604 4.469,5.802 0.313,0.198 10 false 4 4.552,5.729 5.323,5.927 0.771,0.198 10 false BFG*3 4.563,6.375 5.021,6.573 0.458,0.198 10 false B 0.313,4.604 0.625,4.802 0.313,0.198 10 false IC 5.823,4.75 6.281,4.948 0.458,0.198 10 false BFG 6.271,4.75 6.427,4.948 0.156,0.198 10 false B 6.594,4.75 6.906,4.948 0.313,0.198 10 false EL 5.26,4.948 5.719,5.146 0.458,0.198 10 false OFF 5.333,5.344 6.406,5.542 1.073,0.198 10 false Rr 5.333,5.146 5.948,5.344 0.615,0.198 10 false Fr*3 4.906,5.563 6.438,5.76 1.531,0.198 10 false Fog Light Switch 5.25,7.521 6.719,7.958 1.469,0.438 10 false Turn Signal Switch 3.354,7.479 4.344,8.083 0.99,0.604 10 false Steering Wheel Switch Housing 1.125,7.542 3.417,7.74 2.292,0.198 10 false Steering Sensor 0.281,8.073 3.146,8.385 2.865,0.313 10 false *1: for M15B-FKS, 8ZR-FXE TFTM Made 2.854,4.073 3.167,4.271 0.313,0.198 10 false HU 2.854,3.417 3.167,3.615 0.313,0.198 10 false HF 3.25,4.188 3.563,4.385 0.313,0.198 10 false z17 3.229,5.823 3.542,6.021 0.313,0.198 10 false z17 3.24,6.49 3.552,6.688 0.313,0.198 10 false z17 4.094,4.198 4.396,4.469 0.302,0.271 10 false z19 4.104,5.813 4.406,6.083 0.302,0.271 10 false z19 4.115,6.49 4.417,6.76 0.302,0.271 10 false z19 3.208,0.698 3.667,0.896 0.458,0.198 10 false I220*2 3.896,8.083 5.365,8.344 1.469,0.26 10 false *3: w/ Front Fog Light 0.271,8.417 3.135,8.729 2.865,0.313 10 false *2: except M15B-FKS, 8ZR-FXE TFTM Made

0.323,3.292 0.635,3.49 0.313,0.198 10 false IC 2.688,4.292 2.844,4.49 0.156,0.198 10 false A 2.688,5.052 2.844,5.25 0.156,0.198 10 false T 2.677,5.823 2.833,6.021 0.156,0.198 10 false H 2.625,6.979 2.938,7.177 0.313,0.198 10 false EL 2.917,4.396 3.229,4.594 0.313,0.198 10 false z17 3.771,4.406 4.052,4.688 0.281,0.281 10 false z19 3.844,5.719 4.156,5.917 0.313,0.198 10 false 5 2.958,6.896 3.271,7.094 0.313,0.198 10 false 13 3,4.208 3.156,4.406 0.156,0.198 10 false 5 3,4.979 3.156,5.177 0.156,0.198 10 false 3 3,5.719 3.156,5.917 0.156,0.198 10 false 4 3.792,4.208 4,4.406 0.208,0.198 10 false 10 3.802,4.969 4.135,5.219 0.333,0.25 10 false 14 3.792,6.885 4.052,7.115 0.26,0.229 10 false 12 4.25,4.302 4.406,4.5 0.156,0.198 10 false A 4.26,5.063 4.417,5.26 0.156,0.198 10 false T 4.25,5.823 4.406,6.021 0.156,0.198 10 false H 4.25,6.979 4.563,7.177 0.313,0.198 10 false EL 4.313,2.365 5.635,2.885 1.323,0.521 10 false Light Control Switch 5.021,2.115 5.635,2.313 0.615,0.198 10 false HEAD 5.083,1.917 5.698,2.115 0.615,0.198 10 false TAIL 5.031,1.708 5.646,1.906 0.615,0.198 10 false AUTO 5.635,1.51 5.792,1.708 0.156,0.198 10 false A 6.01,1.51 6.167,1.708 0.156,0.198 10 false T 6.365,1.51 6.521,1.708 0.156,0.198 10 false H 6.677,1.5 6.99,1.698 0.313,0.198 10 false EL 0.948,7.688 2.323,7.885 1.375,0.198 10 false Steering Sensor 3.031,7.698 4.021,8.292 0.99,0.594 10 false Steering Wheel Switch Housing 5.021,7.688 6.708,7.885 1.688,0.198 10 false Turn Signal Switch 2.906,5.167 3.219,5.365 0.313,0.198 10 false z17 2.917,5.917 3.229,6.115 0.313,0.198 10 false z17 2.917,7.083 3.229,7.281 0.313,0.198 10 false z17 3.771,5.167 4.052,5.448 0.281,0.281 10 false z19 3.771,5.927 4.052,6.208 0.281,0.281 10 false z19 3.76,7.083 4.042,7.365 0.281,0.281 10 false z19

CAUTION / NOTICE / HINT

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

PROCEDURE

1.READ VALUE USING GTS

Read the Data List according to the display on the GTS.

Chassis > Steering Angle Sensor > Data List

Tester Display	Measurement Item	Normal Condition	Reference Value	Diagnostic Note
Auto Light Switch	Light control switch AUTO position signal	OFF or ON	OFF: Light control switch not in AUTO position ON: Light control switch in AUTO position	-
Head Light Switch (Tail)	Light control switch tail position signal	OFF or ON	OFF: Light control switch in neither tail nor head position ON: Light control switch in tail or head position	-
Head Light Switch (Head)	Light control switch head position signal	OFF or ON	OFF: Light control switch not in head position ON: Light control switch in head position	-
High Beam Main Switch	Dimmer switch high position signal	OFF or ON	OFF: Dimmer switch not in high position ON: Dimmer switch in high position	-
Passing Light Switch	Dimmer switch high flash position (pass) signal	OFF or ON	OFF: Dimmer switch not in high flash position ON: Dimmer switch in high flash position	-
Front Fog Light Switch	Front fog light switch signal	OFF or ON	OFF: Front fog light switch off ON: Front fog light switch on	w/ Front Fog Light
Rear Fog Light/Bad Weather Switch	Rear fog light switch signal	OFF or ON	OFF: Rear fog light switch off ON: Rear fog light switch on	-

Chassis > Steering Angle Sensor > Data List

Tester Display
Auto Light Switch
Head Light Switch (Tail)
Head Light Switch (Head)
High Beam Main Switch
Passing Light Switch
Front Fog Light Switch
Rear Fog Light/Bad Weather Switch

50003 445 4,5,6,7,8,13,14

OK:: Normal conditions listed above are displayed.

Result:

Proceed to
OK
NG

2.READ VALUE USING GTS

5.INSPECT TURN SIGNAL SWITCH

2.READ VALUE USING GTS

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Normal Condition	Reference Value	Diagnostic Note
Light Control Switch (HEAD)	Light control switch head position signal	OFF or ON	OFF: Light control switch not in head position ON: Light control switch in head position	-

Body Electrical > Main Body > Data List

Tester Display
Light Control Switch (HEAD)

50003 449 108

OK:: Normal conditions listed above are displayed.

Result:

Proceed to
OK
NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (except NR Series Engine)>PROBLEM SYMPTOMS TABLE202304,999999,_59,_080784,_0600056,RM100000002BAY4,

3.INSPECT STEERING SENSOR

Remove the steering sensor.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>REMOVAL202304,999999,_54,_080770,_0392400,RM100000002BDIB,

for M15B-FKS, 8ZR-FXE TFTM Made

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I46-7 (HEAD) - z17-4 (H)	Always	Below 1 Ω

except M15B-FKS, 8ZR-FXE TFTM Made

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I220-7 (HEAD) - z17-4 (H)	Always	Below 1 Ω

Result:

Proceed to
OK
NG

4.CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

REPLACE STEERING SENSOR

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>REMOVAL202304,999999,_54,_080770,_0392400,RM100000002BDIB,

4.CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

for M15B-FKS, 8ZR-FXE TFTM Made

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I46-7 (HEAD) - I85-26 (HEAD)	Always	Below 1 Ω
I46-7 (HEAD) or I85-26 (HEAD) - Body ground	Always	10 kΩ or higher

except M15B-FKS, 8ZR-FXE TFTM Made

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I220-7 (HEAD) - I85-26 (HEAD)	Always	Below 1 Ω
I220-7 (HEAD) or I85-26 (HEAD) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202304,202502,_57,_080742,_0392832,RM100000002B2HJ,

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT TURN SIGNAL SWITCH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT DIMMER SWITCH>INSPECTION201906,999999,_59,_080784,_0393169,RM100000001HW61,

Result:

Proceed to
OK
NG

6.INSPECT STEERING WHEEL SWITCH HOUSING

REPLACE TURN SIGNAL SWITCH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT DIMMER SWITCH>REMOVAL201906,999999,_59,_080784,_0393169,RM100000001HW62,

6.INSPECT STEERING WHEEL SWITCH HOUSING

Click hereVehicle Exterior>LIGHTING (EXT)>SWITCH HOUSING>INSPECTION201906,999999,_59,_080784,_0394268,RM100000001I403,

Result:

Proceed to
OK
NG

REPLACE STEERING SENSOR

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>REMOVAL202304,999999,_54,_080770,_0392400,RM100000002BDIB,

REPLACE STEERING WHEEL SWITCH HOUSING

Click hereVehicle Exterior>LIGHTING (EXT)>SWITCH HOUSING>REMOVAL202304,202307,_59,_080784,_0394268,RM100000002BLCR,202307,999999,_59,_080784,_0394268,RM100000002D3IG,