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Pulsed Secondary Air lnjection System
DTC Troubleshootang (cont'd)
33. Check for continuity between large air pump relay 2
P c o n n e c t o r t e r m i n a l N o . 2 a n d a i r p u m p 2 P
connector terminal No. 1.
LARGE AIR PUMP RELAY
2P CONNECTOR
Wire side ot female terminals
ls thete continuity?
YES Go to step 35.
NO Repair open in the wire between the pump
r e l a y a n d t h e a i r p u m p . !
Check for continuity between the air pump 2P
connector terminal No. 2 and body ground.
AIR PUMP 2P CONNECTOR
Wire side of temale terminals
Is there continuity?
Y E S R e p l a c e t h e a i r p u m p . l
NO-Repair open in the wire between the air pump
a n d b o d y g r o u n d . I
34.
11-152
35.
5 0 .
Turn the ignition switch OFF.
D o t h e a i r p u m p r e l a y t e s t ( s e e p a g e 1 1 - 1 6 0 ) .
ls the ait punp relay OK?
YES Go to step 37.
N O R e p l a c e t h e a i r p u m p r e l a y . l
Disconnect ECM connector A {32P).
Reconnect the negative cable to the battery.
T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
Measure voltage between ECM connector terminal
A28 and body ground.
ECM CONNECTOR A (32P1
Wire side o{ temale terminals
ls there voltage?
YES Repair shortto power in the wire uetw€€o
t h e a i r p u m p r e l a y a n d t h e E C M ( A 2 8 ) . 4
NO Substitute a known-good ECM and recheck
lsee page 11-5). lf the symptom/indication goes
away, replace the original ECN4.I
3 7 .
38.
3 9 .
40.
2
3
4
6
I
t 0
12 t3
15
17 1 8 t 9 20 21
24
25 26
n
n
29
32
APR {BLUI
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Table of Contents
Troubleshooting
