LIGHTING (EXT) LIGHTING SYSTEM Headlight Dimmer Switch Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) receives the following switch information:
·
Light control switch in off, tail or head position.
·
Dimmer switch in high, low or high flash (pass) position.
·
Fog light switch in front or off position.
WIRING DIAGRAM
5.917,5.531 6.229,5.729
0.313,0.198
10
false
27
1.479,1.5 2.01,2.125
0.531,0.625
10
false
Dimmer Switch
2.458,1.5 3.229,1.698
0.771,0.198
10
false
FLASH
2.531,1.927 3.302,2.125
0.771,0.198
10
false
LOW
2.531,2.344 3.302,2.542
0.771,0.198
10
false
HIGH
3.344,1.146 3.667,1.344
0.323,0.198
10
false
ED
3.76,1.135 4.083,1.333
0.323,0.198
10
false
(HL)
4.271,1.146 4.594,1.344
0.323,0.198
10
false
HU
4.75,1.146 5.073,1.344
0.323,0.198
10
false
HF
5.313,0.302 5.635,0.5
0.323,0.198
10
false
17
5.313,0.698 5.635,0.896
0.323,0.198
10
false
14
6,0.292 6.323,0.49
0.323,0.198
10
false
5
6,0.698 6.323,0.896
0.323,0.198
10
false
8
3.333,3.75 3.656,3.948
0.323,0.198
10
false
EL
3.865,3.76 4.188,3.958
0.323,0.198
10
false
T
4.333,3.75 4.656,3.948
0.323,0.198
10
false
H
2.542,4.094 3.313,4.292
0.771,0.198
10
false
OFF
2.552,4.521 3.323,4.719
0.771,0.198
10
false
TAIL
2.51,4.948 3.281,5.146
0.771,0.198
10
false
HEAD
1.344,4.188 2.156,5.063
0.813,0.875
10
false
Light Control Switch
5.323,2.698 5.646,2.896
0.323,0.198
10
false
13
5.323,3.083 5.646,3.281
0.323,0.198
10
false
12
5.917,2.698 6.24,2.896
0.323,0.198
10
false
30
5.906,3.083 6.229,3.281
0.323,0.198
10
false
29
1.427,6.396 2.052,6.854
0.625,0.458
10
false
Fog Light Switch
2.531,6.521 3.302,6.719
0.771,0.198
10
false
OFF
2.448,6.948 3.219,7.146
0.771,0.198
10
false
FRONT
3.292,6.177 3.76,6.448
0.469,0.271
10
false
LFG
3.74,6.177 4.333,6.438
0.594,0.26
10
false
BFG
4.906,5.521 5.292,5.792
0.385,0.271
10
false
BFG
5.323,5.521 5.646,5.719
0.323,0.198
10
false
2
0.542,7.323 0.865,7.521
0.323,0.198
10
false
3
0.74,7.313 1.167,7.51
0.427,0.198
10
false
LFG
6.188,5.625 6.958,5.823
0.771,0.198
10
false
FFOG
0.75,5.521 1.073,5.719
0.323,0.198
10
false
EL
0.479,5.521 0.802,5.719
0.323,0.198
10
false
16
1.313,7.885 1.635,8.083
0.323,0.198
10
false
E10
1.323,8.052 4.448,8.344
3.125,0.292
10
false
Headlight Dimmer Switch Assembly
5.375,7.885 7.031,8.448
1.656,0.563
10
false
Main Body ECU (Multiplex Network Body ECU)
5.375,7.729 5.698,7.927
0.323,0.198
10
false
E31
5.01,0.302 5.333,0.5
0.323,0.198
10
false
HU
5.021,0.677 5.344,0.875
0.323,0.198
10
false
HF
6.188,0.406 6.51,0.604
0.323,0.198
10
false
HU
6.198,0.813 6.521,1.01
0.323,0.198
10
false
HF
5.104,2.698 5.427,2.896
0.323,0.198
10
false
T
5.094,3.104 5.417,3.302
0.323,0.198
10
false
H
6.208,2.802 6.979,3
0.771,0.198
10
false
TAIL
6.188,3.208 6.958,3.406
0.771,0.198
10
false
HEAD
PROCEDURE
1.READ VALUE USING GTS
a.
Connect the GTS to the DLC3.
b.
Turn the ignition switch to ON.
c.
Turn the GTS on.
d.
Enter the following menus: Body Electrical / Main Body / Data List.
e.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Dimmer SW | Dimmer switch high position signal | OFF or ON | OFF: Dimmer switch in low position
ON: Dimmer switch in high or high flash position |
- |
| Passing Light SW | 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 SW | Fog light switch front position signal | OFF or ON | OFF: Fog light switch off
ON: Fog light switch in front position |
- |
| Head Light SW (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 |
- |
| Head Light SW (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 |
- |
- Body Electrical > Main Body > Data List
-
Tester Display Dimmer SW Passing Light SW Front Fog Light SW Head Light SW (Head) Head Light SW (Tail) - 50003 123 54,55,57,59,60
- OK:
Normal conditions listed above are displayed.
- Result:
Proceed to OK NG
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
NG
2.INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
2.INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
- HINT:
-
Inspect the items that did not change when reading the Data List.
a.
Remove the headlight dimmer switch assembly.
Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT DIMMER SWITCH>REMOVAL
b.
Inspect the headlight dimmer switch assembly.
Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT DIMMER SWITCH>INSPECTION
- Result:
Proceed to OK NG
OK
3.CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
NG
REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY
3.CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.
Disconnect the E31 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 E10-2 (BFG) - E31-27 (FFOG) Always Below 1 Ω E10-17 (HU) - E31-5 (HU) Always Below 1 Ω E10-14 (HF) - E31-8 (HF) Always Below 1 Ω E10-13 (T) - E31-30 (TAIL) Always Below 1 Ω E10-12 (H) - E31-29 (HEAD) Always Below 1 Ω E10-2 (BFG) or E31-27 (FFOG) - Body ground Always 10 kΩ or higher E10-17 (HU) or E31-5 (HU) - Body ground Always 10 kΩ or higher E10-14 (HF) or E31-8 (HF) - Body ground Always 10 kΩ or higher E10-13 (T) or E31-30 (TAIL) - Body ground Always 10 kΩ or higher E10-12 (H) or E31-29 (HEAD) - Body ground Always 10 kΩ or higher E10-16 (EL) - Body ground Always Below 1 Ω E10-3 (LFG) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR