Honda 2004 Odyssey Service Manual page 1563

Heating/Air Conditioning
Compressor Clutch Circuit Troubleshooting
NOTE:
• Do not use this troubleshooting procedure if the fans
are also inoperative with the A/C on. Refer to the
symptom troubleshooting index.
• Before performing symptom troubleshooting, check
for powertrain DTCs (see page 11-3).
1. Check the No. 59 (7.5A) fuse in the under-hood fuse
/relay box, and the No. 3 (7.5A) fuse in the driver's
under-dash fuse/relay box.
Are the f uses OK ?
YES Go to step 2.
NO Replace the fuse(s), and recheck.
2. Check the engine coolant temperature, throttle
position, and idle speed (Use the HDS PGM-FI data
list if possible).
Sensor '99-01 models:
'02-04 models:
TPS About 0.5 V
RPM More than 730
Is the coolant temperature, throttle position, and
idle speed OK ?
YES Go to step 3.
NO Troubleshoot and repair cause of high engine
coolant temperature, low idle, or excessively high
throttle position sensor reading.
3. Remove the compressor clutch relay from the
under-hood fuse/relay box, and test it (see page 22-
88).
Is the relay OK ?
YES Go to step 4.
NO Replace the compressor clutch relay.
21-32
163 194°F
(73 90°C)
169 194°F
(76 90°C)
4. Measure the voltage between the No.1 terminal of
the compressor clutch relay 4P socket and body
ground.
COMPRESSOR CLUTCH RELAY 4P SOCKET
Is there battery voltage?
YES Go to step 5.
NO Replace the under-hood fuse/relay box.
5. Connect the No. 1 and No. 2 terminals of the
compressor clutch relay 4P socket with a jumper
wire.
COMPRESSOR CLUTCH RELAY 4P SOCKET
Does the compressor clutch click ?
YES Go to step 6.
NO Go to step 15.
6. Disconnect the jumper wire.
7. Turn the ignition switch ON (II).
JUMPER
WIRE
RED