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12. Check for continuity betlveen ECM connector
t e r m i n a l s C 2 4 a n d C 1 8 .
ECM CONNECTOR C (31P)
1
2
4
5
7
8
9 10
11
12
t 3
1 7
20
21
22
/_l:
(
^ t c F t t . ^ t o 1 t .
- | - | | . " | . ' | .
\ Ecs
9IWHTIELKI
n l
l c o l : m n , /
:l
sG2
IGRN/YELI
Wire side of lemale terminals
ls there continuity?
YES Go to step 14.
NO - Repair open in the wire between the ECM
(C24) and the air pump electrical current sensor.I
Disconnect the jumper wire from the air pump
electrical current sensor 3P connector.
Reconnect ECM connector C (31P) and the air pump
electrical current sensor 3P connector.
Turn the ignition switch ON (ll).
1 4 .
t 5 .
1
2
4
5
7
I
I
10
t1
12
t o
t c
t o
1 7
1 8
2A 21
22
24
25
26
27 28
30
ECS
(WHT/BLK)
16. Measure voltage between body ground and ECM
connector terminal C24.
ECM CONNECTOR C {3IP}
Wire side ol female terminals
ls there about 0.5 V?
YES Substitute a known-good ECM and recheck
(see page 1l-5). lf the symptom/indication goes
away, replace the original ECM.I
NO Replace the air pump electrical current
s e n s o r , l
17. Measure voltage between ECM connector
t e r m i n a l s C 1 8 a n d C 2 8 .
ECM CONNECTOR C {3IP}
sG2
IGRN/YEt}
I I I 1 1 0
2
4
5
1 l 12
15
1 1
1 9 t 2 0 1 2 1 t 2 2
25
?6
2
3 l
l a 3 0
vcc2
IYEL/BLUI
Wire side oI female terminals
ls there about 5 V?
YES Repair open in the wire between the ECM
(C28) and the air pump electrical current sensor.I
NO - Substitute a known-good ECM and recheck
{see page 1 1-5). lf voltage is normal, replace the
o r i g i n a l E C M . I
11-157
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Table of Contents
Troubleshooting
