Acura 1994 Integra Service Manual page 234

Th. ll.lfunction Indicltor Lamp
lMlll at!y3 on o. cornaa on alt6l
two aacond!.
Connect the SCS short connector
to th6 sorvice check connector
(see page 11-34).
Turn the ignition switch ON.
Go to iolfdiagnostic Proceduros
(se€ pago 11-34).
Does the MIL indicate anv Oi-
agnostic Trouble Code (DTC)?
Romove th€ SCS shon connector
lrom the service ch€ck connector.
Turn the ignition switch OFF.
Try to start the engine.
Connect the test harness between
the ECM and connectors (see
p a g e 1 1 - 3 7 ) .
Turn the ignition switch ON.
Measure voltage botween D4 (+ )
terminal and D22 { - ) terminal.
connect the SCS shon
connector to servlce
check connector.
ls there approx. 5 V?
Ropair shon to body g.ound in
BRN/WHT wire betwoon th6 ECM
lD4) end sorvlco chock connocto?.
Measure voltage be_
tween D4 {+} terminal
and body ground.
- R6pair open in BRN/WHT wito
botwoon EcM lD4) and s6rv-
ice chock connactor.
- Repoir opon in BLK wiro bo-
twoon 36rvi@ chock connectoa
and G4Ol.
ls there approx. 5 V?
InsDoct ECU {ECM) 115 A) tuse in
th6 undeFhood luse/relav box.
- Rsolaco ECU {ECM} (15 Allus€.
- R6pair shon in YEL/WHT wilo
botw6on ECU lEcMl 115 A)
fuso and PGM-FI main rolay.
Remove the scs short
Connector from the
s e r v i c e c h e c k c o n -
nector.
ls the luss OK?
N O T E :
a When there is no code stored, the MIL willstay on if the service check con-
nector is shorted.
a tf this svmotom is intermittent, check for:
- A loose ECM fuse (15A) in the under-hood tuse/relay box
- A loose No. 24 fuse (ACG) (ALT) ( 1 5A: B1 8B 1 engine, 2OA: B18C 1 en-
gine) in the under-dash fuse/relay box
- An intermittent short in the BRN/WHT wire between the ECM (D4) and
the service check connector
- An intermittent oDen in the BLK wire between the service check con-
nector and G4O1
- An intermittent shon in the GRN/ORN wire between the ECM (A 13) and
the gauge assembly.
- An intermittent short in the YELMHT wire between the ECM (D19) and
the MAP sensor
- An intermittent short in the YEL/BLU wire between the ECM (D20) and
the TP sensor
o o o o o o o o o o o o o l o o o o o o o o
l i i i : $ A $ . P s , l o o o o o o o o o o o
o o o o o o o o o o o o o I o o o o o o o o
o o o o o o o o o o
D 4 ( + )
l"oo,o'.
D22 t-l
u u , l
'NOTE: After repair, disconnect the SCS Short
Connsctor, test drive the car, and recheckthe MIL
lor a code.
(cont'd)
(To page 1 'l -44)
lTo page 1 1-44)
11-43