Mazda MX-6 1998, Руководство по ремонту

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LIGHTING SYSTEMS
PANEL LIGHT CONTROL SWITCH INSPECTION
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1. Remove the panel light control switch. (Refer to 09-18 PANEL LIGHT CONTROL SWITCH
REMOVAL/INSTALLATION.)
2. Connect the connector to the panel light control switch.
3. Measure the voltage at the panel light control switch as indicated below.
4. Disconnect the panel light control switch connector before checking for continuity at terminal D.
5. If not as specified, inspect the parts listed under “ Inspection area” and the related wiring harnesses.
6. If the parts and wiring harnesses are okay but the system still does not work properly, replace the panel light
control switch.
Terminal Voltage List (Reference)
1
D C B
r
A
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Terminal Signal
Connection Test condition
Voltage (V)/
Continuity
Inspection area
A
—
Not used
—
— —
B
TNS Light switch
Headlight switch at first or second position
B+
• Light switch
• TAIL 15 A fuse
Other 0
C Illumination
Each
illumination
Inspect by using an oscilloscope
tr C terminal inspection
—
Each illumination
D
Panel light control
switch ground
GND
Constant: check for continuity to ground Yes GND
C terminal inspection 5. Verify that the pattern on the screen matches the
1. Measure the wave pattern of the C terminal on the pattern shown in the figure as the panel light
panel light control switch by using an oscilloscope. control switch is gradually turned to the darkest
position.
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2. Set the headlight switch to either the first or
second position.
3. Set the panel light control switch to the brightest
position.
4. Verify that the pattern on the screen is as shown
in the figure.
V
o
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0 9 -1 8 -1 5