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PGM-FISystem
q
1 0 .
1 1 .
DTG Troubleshooting (cont'dl
Turn the ignition switch OFF.
Disconnect ECM connector C {31P)
Check for continuity between the connector
t e r m i n a l C 1 ( C 1 1 ) * a n d b o d y g r o u n d .
€cM CoNNECTOB C t31P)
ls there continuity?
YES Repair short in the wire between the ECM
( C 1 , C 1 1 * ) a n d H O 2 S { p r i m a r y o r s e c o n d a r y x )
( S e n s o r 1 , S e n s o r 2 * ) . 1
NO Substitute a known-good ECfvl and recheck
(see page 1'l-5). lf the symptom/indication goes
away, replace the original ECM.I
'12.
Measure voltage between primary HO2S 4P
c o n n e c t o r t e r m i n a l N o . 3 ( s e c o n d a r y H O 2 S N o 4 ) *
and body ground.
PRIMARY HO2S (s€nsor 1)
SECONDAFY
HO2s {sensor 2)
4PCONNECTOR
4P CONNECTOR'
1 1 l 2 l
l l l T z l h c '
F-+_- l
ll--#llBLK/YEL)
|
)
A
|
I
1
t
l
-
l
"
l
-
l
l
r
-
r
l
I
'cl
-,.1-
rv) |BLK/YELI
(V)
Y
Y
W i r e s i d e o f
T e r m i n a l s i d e o f
f e m a l e t e r m i n a l s
m a l e t e r m i n a l s
ls there battery voltage?
YES Go to step 13.
NO Repair open in the wire between the pramary
Ho2S (Sensor
'l), secondary HO2S (Sensor 2) *
a n d N o . 6 A C G ( 1 5 A ) f u s e . I
Wire side of female terminals
11-62
13. Turn the ignition switch OFF.
14. Reconnect the HO2S 4P connector.
15. Disconnect the ECM connector C (31P)'
1 6 . 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 ) .
17. Measure voltage between ECM connector
t e r m i n a l s 8 2 a n d C 1 ( 8 2 a n d C 1 1 ) *
ECM CONNECTORS
(BLK/WHT)}
Wire side of female terminals
ls there 0.1 V ot less?
YES Repair open in the wire between the ECM
( c 1 a n d c 1 1 ) x a n d t h e H o 2 s ( p r i m a r y o r
s e c o n d a r y * ) ( S e n s o r ' 1 , S e n s o r 2 * ) . I
NO Substitute a known-good ECM and recheck
(see page '1 1-5). lf the symptom/indication goes
a w a y , r e p l a c e t h e o r i g i n a l E C M . I
(BLKI
B (25P)
2
3
5
P02SHTC
{BLK/WHT)
9 t 1 0
l l
1Z
2A
z1
?2
/1./
c l 3 1 P )
1 1 2
8 1 9 t 0
l l l 1 2 l 1 3 1 1 4 15
1 6
17
1 6
t 9
N
21 2
s02sHTc
/ 1 . / 1 6
26
zl a
a
30
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Table of Contents
Troubleshooting
