Air Conditioning Signal - Honda CR-V 1997 Service Manual

Air Conditioning Signal
This signals the ECM/PCM when there is a demand for cooling from the air conditioning system.
'97 model:
PCM CONNECTORS
I nlpe~tio n
of Air Co nditioning
AI32P1
C 131PI
Signat.
lGl V ACS
IBRN/BlKI
I
IBLU/ REOI
11 12
3 4
56 V / 9
10
Ht-l
11 23 4 5 6 7 8V
10
11 21/ 1 / 15 16 17 1819 20 / 22 23
24
U l
12 13 14 / 161 7 18 L
/
V
/
/ 1/ 2 / 1/ 1 / /
IL
1 / 1 /
/
1 / 1 /
/
V V
/
Ch ec k for a short i n t he wlr.
lACS line):
Wire side o f female terminals
1. Turn the ignition switch OFF .
2. Discon nect t he
Ale
pressure
switch 2P connector.
3.
Turn the ignition switch ON (II).
4. Measure vo lt age betwee n
PCM
co nn ector
te rmina ls CS
and A9.
PCM COM'lECTOR C 1 31PI
ACS IBlU/ REOI
Check for
8
short in the wire (ACS
line) :
I .
Turn the ignition switch OFF. 11 23 4
5 6
7
8 1 /
Ie
"-
NO
2.
Disconnect PCM connecto r C
111
12 13 14
/ 1617 18 /
1 / 1 / /
Is there battery voltage?
/'
131PJ.
V / / V
1 /
/
1 /
/ /
YES
3. Check for continuity between
body gro u nd and PC M co n-
n
neClor terminal C5.
~
Wire side of fem ale term inals
Repair short In the wire between
"-
YES
Is there contin uity?
/ '
the PCM ICSI and t he A/ C pres-
sure switch.
NO
Ch ec k f o r an open in the w ire
- Substitute.
known-good PCM
IACC IInel:
and recheck. If prescribed volt-
1. Turn the ignit ion switch
OFF.
age is now available, replace
PCM CONNECTOR A I32PI
the original
PCM.
2. Reconnect the AlC pressure
- See the air conditioner inspec-
JUMPERW1RE
switch 2P connector.
3. Turn the ignition switch ON
(II) .
tion lsee section 22).
LGl IBRN/ BLKI
4. Mom e n t arity connect PCM
con n ect or termin als A9 and
11 2
1 5 16 ~/
10
11
I
A 17 with
a
jumper wire sev- 11 21 / 1 / lIE / 12, 23 24 I
era! tim es.
1 / V
1//
k::::..
I
ACC IBlK/REDI
(To
page 1' -156)
Wire side of female termi nals
Ico nt'd)
11-155