Honda Acura NSX 1991 Service Manual page 1149

A 7 A 6 A 6 A,4 A 3 A 2 A l
A l 4
Rear Window Defogger Timer System:
View from terminal
No. Terminal Test condition
Under all conditions.
A8
1
Under all conditions.
2 A9
Ignition switch ON.
A5
3
Defogger switch
4 WHT/RED pushed.
Ignition switch ON.
A10
5
Oil Pressure Indicator System:
No. Terminal Test condition
Under all conditions.
A8
1
Under all conditions.
2 A9
Ignition switch ON.
A5
3
Engine running.
4 WHT/BLU2
Ignition switch OFF
Ignition switch ON.
5
Start the engine.
side
Test: desired result
Check for continuity to ground:
should be continuity.
Check for voltage to ground:
should be battery voltage.
Check for voltage to ground:
should be battery voltage.
Check for continuity to ground:
should be continuity as the
switch is pushed.
Connect to ground: Rear
window defogger should work
and the defogger switch
indicator light should come on.
Test: desired result
Check for continuity to ground:
should be continuity.
Check for voltage to ground:
should be battery voltage.
Check for voltage to ground:
should be battery voltage.
Check for voltage to ground:
should be battery voltage.
Check for continuity to ground:
should be continuity.
Check light operation.
If the light does not come on,
attach the YEL/RED terminal to
ground: Light should come on
as the ignition switch is turned
ON.
Check for voltage to ground:
should be battery voltage.
View from wire side
Possible cause (if result is not obtained)
Poor ground (G401, G402).
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An open in the wire.
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Blown No. 34 (I 5A) fuse.
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An open in the wire.
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Blown No. 5 (lOA) or No. 29
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An open in the wire.
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Faulty defogger switch.
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Poor ground (G401, G402).
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An open in the wire.
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Blown No. 4 (15 A) fuse.
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Faulty defogger relay.
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Blown bulb.
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An open in the wire.
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Possible cause (if result is not obtained)
Poor ground (G401, G402).
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An open in the wire.
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Blown No. 34 (15A) fuse.
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An open in the wire.
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Blown No. 5 (IOA) or No. 29
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An open in the wire.
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Faulty charging system.
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An open in the wire.
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Faulty oil pressure switch.
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An open in the wire.
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Blown bulb.
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An open in the wire.
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Insufficient oil.
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Improper lubricaiton.
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Faulty oil pressure switch.
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