nsxb11126a.pdf

Idle Control System
Brake Switch Signal
This signals the ECM when the brake pedal is depressed.
Are the brake lights on without
depressing the brake pedal?
Inspect the brake switch (see
section 19).
Depress the brake pedal.
Do the brake lights come on?
Is the fuse OK?
Check for an open in the wire:
1. Depress the brake pedal.
2. Measure voltage between
ECM connector terminals F16
and A26 with the brake pedal
depressed.
— 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.
WIRE SIDE OF FEMALE TERMINALS
Is there battery voltage?
Repair open in the wire between
the ECM (F16) and the brake
switch.
Inspection of Brake Switch Signal.
Inspect the BRAKE LIGHT SW
HORN (20 A) fuse in the under-
hood fuse/relay box.
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).
ECM CONNECTORS
Brake switch signal is OK.