2009 SUBARU TRIBECA Service Workshop Manual

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Page 401 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-24
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
7. Diagnostic Procedure for Actuators
A: INTAKE DOOR ACTUATOR
TROUBLE SYMPTOM:
FRESH/RECIRC mode is not changed.
WIR

Page 402 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-25
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK POWER SUPPLY FOR INTAKE
DOOR ACTUATOR.
1) Turn the ignition switch to OFF.
2) Disconnect t

Page 403 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-26
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
B: MODE DOOR ACTUATOR
TROUBLE SYMPTOM:
Air flow outlet is not changed.
WIRING DIAGRAM:
AC-01339
B77
3412 891011 12 1

Page 404 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-27
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK POWER SUPPLY FOR MODE DOOR
ACTUATOR POSITION SENSOR.
1) Turn the ignition switch to OFF.
2

AC(diag)-27
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK POWER SUPPLY FOR MODE DOOR
ACTUATOR POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the mode 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
(B282) No. 8 (+) — (B282) No. 15 (–):
Is the voltage approx. 5 V? Go to step 2.Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>
2CHECK POWER SUPPLY FOR MODE DOOR
ACTUATOR.
Measure the voltage between auto A/C control
module connector and chassis ground after
turning the air flow control switch to FACE posi-
tion.
Connector & terminal
(B283) No. 7 (+) — Chassis ground (–):
Is the voltage 8 V (at normal
temperature)?
Go to step 3.Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>
3CHECK POWER SUPPLY FOR MODE DOOR
ACTUATOR.
Measure the voltage between auto A/C control
module connector and chassis ground after
turning the air flow control switch to DEF posi-
tion.
Connector & terminal
(B283) No. 20 (+) — Chassis ground (–):
Is the voltage 8 V (at normal
temperature)?
Go to step 4.Replace the auto
A/C control mod-
ule.
4CHECK HARNESS BETWEEN AUTO A/C
CONTROL MODULE AND MODE DOOR AC-
TUATOR.
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 mode door actuator con-
nector.
Connector & terminal
(B77) No. 1 — (B282) No. 15:
(B77) No. 3 — (B282) No. 8:
(B77) No. 5 — (B282) No. 3:
(B77) No. 6 — (B283) No. 20:
(B77) No. 7 — (B283) No. 7:
Is the resistance less than 1
Ω?
Go to step 5.Repair the har-
ness between auto
A/C control mod-
ule and mode door
actuator.
5CHECK MODE DOOR ACTUATOR POSI-
TION SWITCH SIGNAL.
1) Connect the connector of auto A/C control
module and mode door actuator.
2) Turn the ignition switch and AUTO switch to
ON.
3) Check the voltage between auto A/C con-
trol module connector terminals while chang-
ing the mode between DEF and FACE.
Connector & terminal
(B282) No. 3 (+) — (B282) No. 15 (–):
Does the voltage change
between 1 V (DEF) and 4 V
(FACE)?
Go to step 6.Replace the mode
door actuator.
REMOVAL, Actua-
tor.>
6CHECK POOR CONTACT.
Check poor contact of auto A/C control module
and connector.
Is there poor contact in con-
nector?
Repair the con-
nector.
Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>

Page 405 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-28
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
C: AIR MIX DOOR ACTUATOR
TROUBLE SYMPTOM:
Outlet air temperature does not change.
WIRING DIAGRAM:
AC-01340
B2353412

Page 406 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-29
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK POWER SUPPLY FOR AIR MIX
DOOR ACTUATOR POSITION SWITCH.
1) Turn the ignition switch to OFF

AC(diag)-29
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK 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
(B282) No. 8 (+) — (B282) No. 15 (–):
Is the voltage approx. 5 V? Go to step 2.Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>
2CHECK 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
Driver’s side
(B283) No. 22 (+) — Chassis ground (–):
Passenger’s side
(B283) No. 21 (+) — Chassis ground (–):
Is the voltage 8 V (at normal
temperature)?
Go to step 3.Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>
3CHECK 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
Driver’s side
(B283) No. 9 (+) — Chassis ground (–):
Passenger’s side
(B283) No. 4 (+) — Chassis ground (–):
Is the voltage 8 V (at normal
temperature)?
Go to step 4.Replace the auto
A/C control mod-
ule. 32, REMOVAL,
Control Unit (Auto
A/C Model).>
4CHECK 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
Driver’s side
(B390) No. 1 — (B282) No. 15:
(B390) No. 3 — (B282) No. 8:
(B390) No. 5 — (B282) No. 12:
(B390) No. 6 — (B283) No. 9:
(B390) No. 7 — (B283) No. 22:
Passenger’s side
(B235) No. 1 — (B282) No. 8:
(B235) No. 3 — (B282) No. 15:
(B235) No. 5 — (B282) No. 4:
(B235) No. 7 — (B283) No. 8:
(B235) No. 6 — (B283) No. 21:
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.

Page 407 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-30
Diagnostic Procedure for Actuators
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
5CHECK AIR MIX DOOR ACTUATOR POSI-
TION SWITCH SIGNAL.
1) Connect the connector of auto A/C control
module and air

Page 408 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual AC(diag)-31
Diagnostic Procedure for Sensors
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
8. Diagnostic Procedure for Sensors
A: AMBIENT SENSOR
TROUBLE SYMPTOM:
Fan speed is not switched when the fan speed co

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