Acura 1994 Integra Service Manual page 233

PGM-FI System
Engine Control Module (ECM)
lB18B1 ongino onlyl
The Malfunction Indicator Lamp
(MlL) n6v6. com6s on lovon fol
lwo socondal aftor ignition is
tumed on.
lurn the ignition switch ON.
Inspect No. 15 {BACK-UP LIGHT}
l1O A) luse in the underdash
tuse/relay box.
ls the low oil pressure light on?
- R € p l a c o N o . ' l 5
IBACK-UP LIGHT)
llo Al fuso.
- R o p a i r s h o r t i n
YEL wiro botwoon
No. 15 (BACK-UP
LIGHT) {10 A) fuso
ano gauge 6$om-
blv.
T u r n l h e i g n i t i o n s w i t c h O F F .
ls the fuse OK?
Connecl the test harness between
the ECM and connectors (see
p a g € 1 1 - 3 7 ) .
Repair opon in YEL wiio botw6on
No.'15 IBACK-UP LIGHTI 110 A)
luso and gaug6 assombly.
Turn the ignition switch ON.
- RsDlaco tho MIL bulb.
- Ropair opon in GRN/ORN wi.e
betwoen ECM {A13} and
gaug€ a$6mbly.
l s t h e M I L o n ?
Measure voltage between body
Oround and the tollowing termi-
nafs individuallv: 423, 424.
Ropah op6n in BLK wirolsl bo-
tw6en ECM and GlOl llocatod at
thormostat housing) that had
moro than 1.0 V.
ls there less than 1.O V?
Substituto a known-good ECM
and rochgck, lf symptom/indica-
tion go€s away, roplaco tho origi-
nal ECM.
NOTE: lf this svmptom is intermittent. check for a loose fuse No. 15 (BACK
UP LIGHT, 1OA) in the under-dash Juse/relay box, a poor connection at ECM
terminal A13, or an intermittent open in the GRN/ORN wire between the ECM
(A13) and the gauge assembly.
I
A13
I
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