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14. Measure voltage between ECM/PCM connector
t e r m i n a l s A26 and B20.
E C M / P C M C O N N E C T O R S
/
2
3
4
5
6
/
8
9
10
1 2 1 3 1 4 15
/
17 18 19 2 0 21
2 3
2 4
2 5 2 6 2 7
2 8 2 9 3 0
3 2
P S P S W ( G R N )
B (25P)
1
2
3
4
5
7
8
9
10
11 12 13 14
16 17 18
19
2 0
21 2 2
2 3 2 4 2 5
1
LG1 ( B R N / B L K )
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there battery
voltage?
YES - Replace the PSP switch. •
N O - G o t o step 15.
15. Turn the ignition switch OFF.
16. Disconnect ECM/PCM connector A (32P).
17. Check f o r continuity between body ground and
ECM/PCM connector terminal A26.
E C M / P C M C O N N E C T O R A ( 3 2 P )
/
2
3
4
5
6
/
8
9
10
12 13 14 15
/
17 18 19 20 21
23
24
25 26 27
28 29 30
32
P S P S W ( G R N )
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there
continuity?
YES—Repair short in the wire between the ECM/
PCM (A26) and the PSP switch. •
N O - S u b s t i t u t e a known-good ECM/PCM and
recheck (see page 11-5). if the prescribed voltage
is n o w available, replace the original ECM/PCM. I
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 19-5). •
N O - G o t o step 2.
2. Press the brake pedal.
Do the brake lights come on?
Y E S - G o t o step 3.
N O - G o t o step 4.
3. Measure voltage between ECM/PCM connector
terminals A32 and B20 w i t h the brake pedal
pressed.
ECM/PCM CONNECTORS
/
2
3
4
5
6
/
8
9
10
1 2 1 3 1 4 1 5
/
1 7 1 8
19 20
21
/
2 3
2 4
2 5 2 6 2 7
2 8 2 9 3 0
/
3 2
BKSW (WHT/BLK)
1
2
3
4
5
7
8
9
10
1 1 1 2 1 3 1 4
1 6 1 7 1 8
19
2 0
2 1 2 2
2 3 2 4 2 5
J L G 1 (BRN/BLK)
Wire side of female terminals
Is there battery
voltage?
YES—The brake pedal position switch signal is
OK.m
NO— Repair open in the w i r e between the ECM/
PCM (A32) and the brake pedal position switch. •
4. Inspect the STOP (20A) fuse in the under-hood
fuse/relay box.
Is the fuse
OK?
YES — Repair open in the w i r e between the brake
pedal position switch and the STOP (20 A) fuse.
Inspect the brake pedal position switch (see page
1 9 - 5 ) . •
NO —Repair short in the wire between the ECM/
PCM (A32) and the STOP (20 A) fuse. Replace the
STOP (20 A) f u s e . l
11-109
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Table of Contents
Troubleshooting
