Acura NSX 1997 Service Manual page 240

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Brake Switch Signal
This signals the ECM when the brake pedal is depressed.
Inspection of Brake Switch Signal.
Are the brake lights on without
depressing the brake pedal?
Depress the brake pedal.
Do the brake lights come on?
Check for an open in the wire
(BKSW line):
1. Depress the brake pedal.
2. Measure voltage between
ECM connector terminals F16
and A26 with the brake pedal
depressed.
Is there battery voltage?
Brake switch signal is OK.
Table of Contents
Inspect the brake switch (see
section 19).
Is the fuse OK?
Repair open in the wire
between the brake switch
and the BRAKE LIGHT SW
HORN (20 A) fuse.
Inspect the brake switch (see
section 19).
Repair open in the wire between
the ECM (F16) and the brake
switch.
Repair short in the wire
between the brake switch
and the BRAKE LIGHT SW
HORN (20 A) fuse.
Replace the BRAKE LIGHT
SW HORN (20 A) fuse.
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