Subaru Forester 2004 - Page 84

AC-30
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Procedure for Actuators
Step Check Yes No
1 CHECK POWER SUPPLY FOR AIR MIX
DOOR ACTUATOR POSITION SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the air mix door actuator con-
nector.
3) Turn the ignition switch and AUTO switch to
ON.
4) Measure the voltage between auto A/C
control module connector terminals.
Connector & terminal
(i48) No. 7 (+) — (i48) No. 16 (
− ):
Is the voltage approx. 5 V? Go to step 2. Replace the auto
A/C control mod-
ule.
2 CHECK POWER SUPPLY FOR AIR MIX
DOOR ACTUATOR.
Measure the voltage between auto A/C control
module connector and chassis ground after
turning the temperature control dial to maxi-
mum COOL position.
Connector & terminal
(i49) No. 6 (+) — Chassis ground (
− ):
Is the voltage 7 V (at normal
temperature)?
Go to step 3. Replace the auto
A/C control mod-
ule.
3 CHECK POWER SUPPLY FOR AIR MIX
DOOR ACTUATOR.
Measure the voltage between auto A/C control
module connector and chassis ground after
turning the temperature control dial to maxi-
mum HOT position.
Connector & terminal
(i49) No. 7 (+) — Chassis ground ( − ):
Is the voltage 7 V (at normal
temperature)?
Go to step 4. Replace the auto
A/C control mod-
ule.
4 CHECK HARNESS BETWEEN AUTO A/C
CONTROL MODULE AND AIR MIX DOOR
ACTUATOR.
1) Turn the A/C and ignition switch to OFF.
2) Disconnect the auto A/C control module
connector.
3) Measure the resistance between auto A/C
control module and air mix door actuator con-
nector.
Connector & terminal
LHD model:
(i65) No. 1 — (i49) No. 1:
(i65) No. 2 — (i49) No. 7:
(i65) No. 3 — (i48) No. 16:
(i65) No. 4 — (i48) No. 7:
(i65) No. 6 — (i49) No. 6:
RHD model:
(B293) No. 1 — (i49) No. 1:
(B293) No. 2 — (i49) No. 7:
(B293) No. 3 — (i48) No. 16:
(B293) No. 4 — (i48) No. 7:
(B293) No. 6 — (i48) No. 6:
Is the resistance less than 1
Ω?
Go to step 5. Repair the har-
ness between auto
A/C control mod-
ule and air mix
door actuator.