Honda Civic 2002-2003 Service Manual page 802

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
BLU IRED
I
JUMPER WIRE
1
2
-
4
I
3
Does the compressor clutch click?
YES-Go to step 6.
NO-Go to step 14.
6. Disconnect the jumper wire.
7. Turn the ignition switch ON (II).
8. Measure the voltage between the NO.3 terminal of
the compressor clutch relay 4P socket and body
ground.
COMPRESSOR CLUTCH RELAY 4P SOCKET
2
4
BLK/YEL
' : :I.
=
Is there battery voltage?
YES-Go to step 9.
NO-Repair open in the wire between the No. 14
fuse in the under-dash fuse/relay box and the
compressor clutch relay .•
9. Turn the ignition switch OFF.
10. Reinstall the compressor clutch relay.
11. Make sure the AlC switch is OFF.
12. Turn the ignition switch ON (II).
13. Using the Backprobe Set, measure the voltage
between the No. 18 terminal of ECM connector
E (31 P) and body ground with the ECM connectors
connected.
ECM CONNECTOR E (31P)
9
22
31
Wire side of female terminals
Is there battery voltage?
YES-Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
NO-Repair open in the wire between the
compressor clutch relay and the ECM .•
14. Disconnectthe jumper wire.
15. Disconnect the compressor clutch 1 P connector.
(conl'd)
21-31