Subaru Legacy 2003 Service Manual page 3513

DIAGNOSTICS FOR A/C SYSTEM FAILURE (RHD MODEL)
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
7 CHECK HARNESS BETWEEN BLOWER
FAN MOTOR RELAY AND A/C CONTROL
MODULE.
1) Disconnect connector from A/C control
module.
2) Measure resistance between blower fan
motor relay and A/C control module har-
ness connector.
Connector & terminal
(B50) No. 3 — (i49) No. 3:
Is the measured value less than the speci-
fied value?
8 CHECK UNDER AUTO MODE.
1) Connect all of removed relays and discon-
nected connectors.
2) Start the engine and turn the A/C switch to
ON.
3) Select AUTO mode.
4) Check, if blower fan speed changes.
Does change the blower fan speed?
9 CHECK FOR POOR CONTACT.
Check, if there is poor contact in A/C control
module connector.
Is there poor contact in the connector?
Step Value
1 Ω
Blower fan speed changes.
There is no poor contact.
AC-40
Yes
Go to step 8. Repair harness
between blower
fan motor relay
and A/C control
module.
Blower fan is OK. Go to step 9.
Replace A/C con- Repair poor con-
trol module. tact in connector.
No