Honda Civic Service Manual page 793

Heating and Air Conditioning
DTC Troubleshooting lcont'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
2
1
4
3
23.
ls there battety voltage?
YES-Go to step 23.
NO Replace the under-hood fuse/relay box.t
Turn the ignition switch ON {ll).
Measure the voltage between the No. 2 terminal of
the blower motor relay 4P socket and body ground,
BLOWER MOTOR RELAY 4P SOCKET
ls 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.I
21-22
25.
26.
Turn the ignition switch OFF,
Check for continuity between the No. 1 terminal of
the blower motor relay 4P socket and body ground.
BLOWER MOTOR RELAY 4P SOCKET
ls there continuity?
YES-Repair open in the BLUIr'/HT wire between
the blower motor relay and the blower motor.l
NO Check for an open in the wire between the
blower motor relay and body ground. lf the wire is
O K , c h e c k f o r p o o r g r o u n d a t G 3 0 1 . 1
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