Light Control Switch Circuit
Circuit diagnosis
DESCRIPTION
This circuit detects the state of the headlight dimmer switch.WIRING DIAGRAM
INSPECTION PROCEDURE
| 1. READ VALUE OF INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and press the intelligent tester main switch ON.
Select the items below in the DATA LIST, and read the displays on the intelligent tester.
BODY NO.1: Item
Measurement/
Display (Range)
Normal Condition
Diagnostic Note
Dimmer Hi SW
Headlight dimmer SW signal/ON or OFF
ON: Headlight dimmer switch is in HI or FLASH position
OFF: Headlight dimmer switch is in LO position
-
Passing Light SW
Passing Light SW signal/ON or OFF
ON: Headlight dimmer switch is in FLASH position
OFF: Headlight dimmer switch is in except FLASH position
-
Front Fog Light SW
Front fog light SW signal/ON or OFF
ON: Front fog light switch is in ON position
OFF: Front fog light switch is OFF position
-
Light Auto SW
Light auto SW signal/ON or OFF
ON: Headlight dimmer switch is in AUTO position
OFF: Headlight dimmer switch is in except AUTO position
-
Headlight SW
Headlight control SW signal/ON or OFF
ON: Light control switch is in HEAD position
OFF: Light control switch is in except HEAD position
-
Taillight SW
Taillight SW signal/ON or OFF
ON: Light control switch is in TAIL or HEAD position
OFF: Light control switch is in OFF position
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| OK | ||
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| 2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY |
Inspect the headlight dimmer switch assembly (Click here).
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| OK | |
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| 3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
Measure the voltage according to the value(s) in the table below.
- Voltage:
Tester connection
Condition
Specified condition
1N-2 - Body ground
Headlight dimmer switch LOW → HIGH
10 to 14 V → Below 1 V
B6-13 - Body ground
Rear fog light switch OFF → ON
10 to 14 V → Below 1 V
B6-15 - Body ground
Headlight dimmer switch LOW → FLASH
10 to 14 V → Below 1 V
B6-16 - Body ground
Light control switch OFF → AUTO
10 to 14 V → Below 1 V
B6-17 - Body ground
Light control switch OFF → TAIL
10 to 14 V → Below 1 V
B6-22 - Body ground
Front fog light switch OFF → ON
10 to 14 V → Below 1 V
B6-23 - Body ground
Light control switch OFF → HEAD
10 to 14 V → Below 1 V
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| OK | ||
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