Subaru Legacy 2002 Service Manual page 3190

DIAGNOSTICS FOR A/C SYSTEM FAILURE (RHD MODEL)
No.
1 CHECK FUSE.
1) Turn ignition switch to OFF.
2) Remove fuse No. 2 from main fuse box.
3) Check condition of fuse.
2 CHECK FUSE.
1) Remove fuse No. 4 and No. 17 from joint
box.
2) Check condition of fuse.
3 CHECK A/C CONTROL MODULE POWER
CIRCUIT.
1) Pull out A/C control module.
2) Measure voltage between A/C control mod-
ule connector terminal and chassis ground
when turning ignition switch to OFF.
Connector & terminal
(i48) No. 1 (+) — Chassis ground (−):
4 CHECK A/C CONTROL MODULE POWER
CIRCUIT.
Measure voltage between A/C control module
connector terminal and chassis ground when
turning ignition switch to ACC.
Connector & terminal
(i48) No. 3 (+) — Chassis ground (−):
5 CHECK A/C CONTROL MODULE POWER
CIRCUIT.
Measure voltage between A/C control module
connector terminal and chassis ground when
turning ignition switch to ON.
Connector & terminal
(i48) No. 2 (+) — Chassis ground (−):
6 CHECK POOR CONTACT.
Check poor contact in A/C control module.
Step
Is the fuse blown-out?
Is the fuse blown-out?
Is the voltage more than 10
V?
Is the voltage more than 10
V?
Is the voltage more than 10
V?
Is there poor contact in A/C
control module?
AC-47
HVAC System (Auto A/C) (Diagnostics)
Check Yes
Replace fuse.
Replace fuse.
Go to step 4.
Go to step 5.
Go to step 6.
Repair poor con-
tact in A/C control
module.
No
Go to step 2.
Go to step 3.
Repair short cir-
cuit in harness for
power supply line.
Repair short cir-
cuit in harness for
power supply line.
Repair short cir-
cuit in harness for
power supply line.
Contact with your
Subaru distributor
service.