Honda Civic 2002-2003 Service Manual page 793

Heating and Air Conditioning
DTC Troubleshooting (cont'd)
22. Measure the voltage between the No.3 terminal of
the blower motor relay 4P socket and body ground.
BLOWER MOTOR RELAY 4P SOCKET
Is there battery voltage?
YES-Go to step 23.
NO-Replace the under-hood fuse/relay box .•
23. Turn the ignition switch ON (II).
24. Measure the voltage between the No.2 terminal of
the blower motor relay 4P socket and body ground.
BLOWER MOTOR RELAY 4P SOCKET
=
Is there battery voltage?
YES-Go to step 25.
NO-Repair open in the wire between the No. 14
fuse in the under-dash fuse/relay box and the
blower motor relay .•
21-22
25. Turn the ignition switch OFF.
26. Check for continuity between the No.1 terminal of
the blower motor relay 4P socket and body ground.
BLOWER MOTOR RELAY 4P SOCKET
Is there continuity?
YES-Repair open in the BLU/WHT wire between
the blower motor relay and the blower motor..
NO-Check for an open in the wire between the
blower motor relay and body ground. If the wire is
OK, check for poor ground at G301 .•