Honda Civic Service Manual page 474

ldle Gontrol System
Air Gonditioning Signal ('96 - 98 Models, '99 - 00 Dl6Y5 engine with M/Tl
a {32P1
ECM/PCM CONNECTORS
Wire side of female terminals
c l3lPl
This sjgnals the ECM/PCM when there is a demand for cooling from the air conditioning system.
(To page 11-205)
C h e c k f o r a s h o r t i n t h e w i r e
{ACS line):
1. Turn the ignition switch OFF.
2. Disconnect the A/C pressure
switch 2P connector {see sec
tion 22).
3. Turn the ignition switch ON (ll).
4 . M e a s u r e v o l t a g e b e t w e e n
E C M / P C M c o n n e c t o r t e r m i -
nals C5 and A9.
Check for a .hort in the wi.e {ACS
line):
1. Turn the ignition switch OFF.
2. Disconnect the ECM/PCM con-
nector C (3lPi.
3. Check tor continuity between
b o d y g r o u n d a n d E C M / P C M
connector terminal C5,
ls there approx. 5 V?
Reotir short in the wi.e between
the ECM/PCM lc5l and rhe A/C
pressure switch.
l s t h e r e c o n t i n u i t y ?
-
Substitute a known-good
ECM/rcM .nd re.fieck. f Dre-
scribed voltage is now avail
tble, replace the original ECft4/
PCM,
-
See the air conditioner inspe-
tion ls€e s€ction 221.
Check tor an op€n in the wire
IACC lin6l:
1. Turn the ignition switch OFF.
2. Reconnect the A/C pressure
switch 2P connector.
3. Turn the ignition switch ON (ll).
4 . M o m e n t a r i l y c o n n e c t E C M /
PCM connector terminals A9
a n d A 1 7 w i t h a j u m p e r w i r e
LGl IBRN/8LKI
ACS {BLU/RED)
2 3
6 1 I
9
't0
I t t 3
a
8 9
t 0
12 't3
1 a
l 5
l 6
1 7 t 8 t 9 20
23
2a
l l 12 l 3
l!a
i 5 ! 6 1 7
'tE
25
2 l
2A
29 30
23
2a 25 29 30
ACS (BLU/BEDI
LGl IBRN/BLKI
1
2 3 a
s l s l r l l o l g l r o l r r I
1 2 1 3
1 4 l 5 1 6
y ) n l t s l n l / @ ) z r I z r I
25 27
1!M1
1-/r
ACC
11-204
IBLK/RED)
JUMPER WIRE