Honda 2004 Odyssey Service Manual page 497

Idle Control System
A/C Signal Circuit Troubleshooting
'99-00, '02-04 Models
NOTE: Information marked with an asterisk ( ) applies
to '02-04 models.
1. Turn the ignition switch OFF.
2. Disconnect the A/C pressure switch 4P connector.
3. Turn the ignition switch ON (II).
4. Measure voltage between PCM connector
terminals A27 and B20.
PCM CONNECTORS
A (32P)
ACS (BLU/RED)
Wire side of female terminals
Is there about 5 V ?
YES Go to step 5.
NO Go to step 12.
5. Turn the ignition switch OFF.
6. Reconnect the A/C pressure switch 4P connector.
7. Turn the ignition switch ON (II).
11-188
B (25P)
LG1 (BRN/BLK)
LG1 (BRN/YEL)*
8. Momentarily connect PCM connector terminals A17
and B20 with a jumper wire several times.
PCM CONNECTORS
A (32P)
ACC (RED)
JUMPER WIRE
Wire side of female terminals
Is there a clicking noise f rom the A/ C compressor
clutch?
YES Go to step 9.
NO Go to step 15.
9. Start the engine.
10. Turn the blower switch ON.
11. Turn the A/C switch ON.
Does the A/ C operate?
YES The air conditioning signal is OK.
NO Go to step 16.
12. Turn the ignition switch OFF.
13. Disconnect PCM connector A (32P).
B (25P)
LG1 (BRN/BLK)
LG1 (BRN/YEL)*