Heater Control Power And Ground Circuits Troubleshooting - Honda EP3 Service Manual

Heater Control Power and Ground Circuits Troubleshooting
1 . C h e c k t h e N o . 1 4 ( 1 0 A ) f u s e i n t h e u n d e r - d a s h
fuse/relay box.
ls the f use OK?
YES-Go to step 2.
N O - R e p l a c e t h e f u s e , a n d r e c h e c k . l
2. Disconnect heater control panel connectorA{'14P).
3. Turn the ignition switch oN (ll).
4. Measure the voltage between the No. l4terminal
of heater control panel connector A (14P) and body
g r o u n o .
HEATER CONTROL PANEL CONNECTOR A {14P}
2 3 4 5 6
7 8 I 1 0 l ,
11 12
1 4
Wire side of temale terminals
BLK/YEL
ls there battery voltage?
YES-Go to step 5.
NO Repair open in the wire betvveen the No. 14
fuse in the under-dash fuse/relay box and the
heater control panel.l
Turn the ignition switch OFF.
6. Check for continuity between the No. l3terminal of
heater control panel connector A (14P) and body
g rou nd.
HEATER CONTRoL PANEL CONNEcToR A (1ilP)
1 2
3
4 5 6
I
8 9
r0 t,
1 l 12
1 4
BLK
.o
Wire side of temaleterminals
ls therc continuity?
YES Check for loose wires or poor connections at
healer control panel connector A (14P). lfthe
connections are good, substitute a known-good
heater control panel, and recheck. lf the symptom/
indication goes away, replace the original heater
control panel.l
NO Check for an open in the wire between the
heater control panel 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 5 0 1 . I
21-27