A/C Signal Circuit Troubleshooting - Honda S2000 Service Manual

ldle Control System
A/C Signal Circuit Troubleshooting
1. Turn the ignition switch OFF.
2. Disconnect the A/C pressure switch connector.
3 . T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
4. Measure voltage between ECM connector
terminals A27 and 820.
ECM CONNECTORS
Wire side of female terminals
ls therc about 5v?
YES Go to step 5.
NO Go to step 12.
5. Turn the ignition switch OFF.
6. Reconnect the A'lC pressure switch connector.
7. Turn the ignition switch oN (ll).
1 1 - 9 4
A (32P)
8. Momentarily connect ECM connector terminals A17
and B20 with a iumoerwire several tames.
ECM CONNECTORS
JUMPER WIRE
Wire side of female terminals
ls there a clicking noise lrom the NC comptessor
clutch?
YES Go to step 9.
NO Go to step 16.
Sta rt the engine.
Turn the blower switch ON.
Turn the Ay'C switch oN.
Does the NC operate?
Y E S - T h e a i r c o n d i t i o n i n g s i g n a l i s O K . l
N O - G o t o s t e p 1 6 .
Turn the ignition switch OFF.
Disconnect EcM connector A (32P)
9 .
1 0 .
1 1 ,
12.
1 3 .