Brake Pedal Position Switch Signal Circuit Troubleshooting - Honda Civic 2002-2003 Service Manual

• Brake Pedal Position Switch Signal Circuit Troubleshooting
•
•
1. Check the brake lights.
Are the brake lights on without pressing the brake
pedal?
YES-Inspect the brake pedal position switch
(see page 19-61 .•
NO-Go to step 2.
2. Press the brake pedal.
Do the brake lights come on?
YES-Go to step 3.
NO-Go to step 4.
3. Measure voltage between ECM connector
terminals A24 and E22 with the brake pedal
pressed.
ECM CONNECTORS
A (31P)
1 2 314
5 6 71
V
9
10 111121/1/ 15 16 1/118119 20 21
2223\24\
~ 27\28\29 30/
LGl (BRN/YEL)
E (31P)
1 2 1 3 1 4 5 6 7
I \
8
T
/ /VV114
15 16 V118/120
22231241
~
271/129130
IBKSW
(WHT/BLK)
Wire side of female terminals
Is there battery voltage?
9
21
31
YES- The brake pedal position switch signal is
OK .•
NO-Repair open in the wire between the ECM
(E221 and the brake pedal position switch .•
4. Inspect the NO.7 HORN, STOP (15AI fuse in the
under-hood fuse/relay box.
Is the fuse OK?
YES-Repair open in the wire between the brake
pedal position switch and the No.7 HORN, STOP
(15AI fuse. Inspect the brake pedal position switch
(see page 19-101 .•
NO-Repair short in the wire between the ECM
(E221 and the NO.7 HORN, STOP (15AI fuse.
Replace the No.7 HORN, STOP (15AI fuse .•
11-137