Subaru Legacy 2004 Service Manual page 3437

Step
1 CHECK POWER SUPPLY FOR INTAKE
DOOR ACTUATOR.
1) Turn the ignition switch to OFF.
2) Disconnect the intake door actuator con-
nector.
3) Turn the ignition switch to ON.
4) Measure the voltage between intake door
actuator connector and chassis ground.
Connector & terminal
(B91) No. 7 (+) — Chassis ground (
2 CHECK HARNESS BETWEEN AUTO A/C
CONTROL MODULE AND INTAKE DOOR
ACTUATOR.
1) Turn the ignition switch to OFF.
2) Disconnect the auto A/C control module
connector.
3) Measure the resistance between intake
door actuator connector and auto A/C control
module connector.
Connector & terminal
(B283) No. 10 — (B91) No. 3:
(B283) No. 20 — (B91) No. 1:
3 CHECK OPERATION OF INTAKE DOOR AC-
TUATOR.
1) Connect the intake door actuator connec-
tor.
2) Ground the auto A/C control module con-
nector with a suitable wire.
3) Turn the ignition switch to ON, and check
the operation of intake door actuator.
Connector & terminal
(B283) No. 10 — Chassis ground:
4 CHECK OPERATION OF INTAKE DOOR AC-
TUATOR.
1) Turn the ignition switch to OFF.
2) Ground the auto A/C control module con-
nector with a suitable wire.
3) Turn the ignition switch to ON, and check
the operation of intake door actuator.
Connector & terminal:
(B283) No. 20 — Chassis ground:
Diagnostic Procedure for Actuators
Is the voltage 7 V (at normal
temperature)?
$
):
Is the resistance less than 1
#?
Does the actuator move to the
FRESH side?
Does the actuator move to the
RECIRC side?
AC(diag)-25
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Replace the auto
A/C control mod-
ule.
No
Check the harness
for open or short
circuit between
intake door actua-
tor and fuse.
Repair the har-
ness between auto
A/C control mod-
ule and intake
door actuator.
Replace the intake
door actuator.
Replace the intake
door actuator.