Air Conditioning Signal - Honda Civic Service Manual

ldle Control System
Air Conditioning Signal ('99 - 00 Models except Dl6Y5 engine with M/Tl
This signals the ECM/PCM when there is a demand for cooling from the air conditioning system.
ECM/PCM CONNECTORS
a l32P)
ECM/PCM CONNECTOR A {32P)
Wire side of female terminals
ECM/PCM CONNECTORS
A (32P1
C h o c k t o r a s h o r t i n i h e w i . e
(ACS lin6):
1. Turn the ignition switch OFF.
2. Disconnect the A/C pressure
switch 2P connector.
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 A27 and 820.
Check for a short in the wire (ACS
linel:
'1. Turn the ignition switch OFF.
2. Disconnect the ECM/PCM con
nector A (32P).
3. Check lor continuity between
body ground and ECM/PCM
connector terminal A27.
Reoair short in lhe wi.e botweon
the ECM/PCM (A271 and rhe A/C
pressure swilch.
Srr66tituto a known{ood ECM/
PCt4 tnd rechock. It prascrib€d
voltage is now available, re-
plac€ the original ECM/rcM.
Soo the air conditioner insoec-
tion {see s€ction 22}.
Check to. an opon in tho wi.e
(ACC linel:
1. Turn the ignition switch OFF.
2. Reconnect the A/C pressure
switch 2P conneclor.
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 N 4 /
PCM connector terminals A17
a n d 8 2 0 w i t h a j u m p e r w i r e
(To page '! 1-207)
11-206
L G l { B R N / B L K )