Honda Civic Service Manual page 382

PGM-FI System
( F r o m p a g e ' 1 1 - 1 1 1 )
Check loi an open in the wires
(lGP linesl:
1. Disconnect the lueliniector and
IAC valve connectors.
2. Turn the ignition switch ON (ll).
3 , M e a s u r e v o l t a g e b e t w e e n
b o d y g r o u n d a n d E C M / P C M
c o n n e c t o r t e r m i n a l s 8 1 a n d
Bg individually.
-
R e p a i r o p e n i n t h e w i r o ( 3 )
between ECM/PCM lBl, B9l
and PGM-Fl main relay.
-
Check tor poor connections
or loose wires al the PGM-FI
main relav.
-
Test tho PGM-FI main rehy
(3.e page 11-237).
ls there battery voltage?
Check tor an open in the wires
(PG, LG lines):
1 . R e c o n n e c t t h e f u e l i n i e c t o r
and IAC valve connectors.
2 . M e a s u r e v o l t a g e b e t w e e n
body ground and ECM/PCM
connector terminals 82, 810,
820 and 822 individually.
R e p a i r o p e n i n t h e w i r e l s )
b e t w e e n E C M / P C M a n d G 1 0 1
llocated ai the l6ft side of tho
intaks m.nifoldl thrt h.d more
than 1.0 V.
ls there lessthan 1.0 V?
Check for a short in the wires
{VCCI, VCC2 lin6s}:
Measure voltage between body
ground and ECM/PCM connector
terminals C19 and C28 individually. Check toa a 3hort in s 3ensor:
W h i l e m e a s u r i n g v o l t a g e
between body ground and ECM/
P C [ / t c o n n e c t o r t e r m i n a l s C 1 9
and C28 individually, disconnect
the 3P connector of each sensor
one at time:
. MAP sensor
. TP sensor
. EGR valve
. Fueltank pressure sensor
ls there approx.5 V?
Reoair short in lhe wire betwe.en
M A P 3 a n s o r , T P s e n s o r , E G R
valve, Fuel tank pres3ure 3ensor
and ECM/PCM {Cl9, C28).
ls there approx. 5 V?
Substiiute a known-good ECM/
PCM and racheck. ll symptom/
indicetion goes eway, replace
th6 original ECM/PCM.
R e p l a c e t h o s a n s o r t h a t h a d
.pprox. 5 V.
Engine Control Module/Powertrain
('99 - 00 Model except Dl6Y5 (M/Tl
Module (ECM/PCM)
(cont'd)
Control
engine)
ECM/PCM CONNECTOR B {25P)
LG1 (BRN/BLKI
Wire side of female terminals
ECM/PCM CONNECTOR C (31P)
f e m a l e t e r m i n a l s
vcc2
IYEL/BLUI
vccl
{YEL/RED)
Wire side of female terminals
1 1 - 1 1 2