2009 SUBARU TRIBECA sensor

AC(diag)-36
Diagnostic Procedure for Sensors
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK EVAPORATOR SENSOR
1) Turn the ignition switch to OFF.
2) Remove the glove box.
3) Disconnect the connector from evaporator
sensor.
4) Measure the resistance between connector
terminals of evaporator sensor.
Te r m i n a l s
No. 1 — No. 2:
Is the resistance approximately
1.9 kΩ at 20°C (68°F)?
Go to step 2.Replace the evap-
orator sensor.
REMOVAL, Evap-
orator.>
2CHECK INPUT SIGNAL FOR EVAPORATOR
SENSOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between connector
(B88) terminal and chassis ground.
Connector & terminal
(B88) No. 1 (+) — No. 2 (–):
Is the voltage approx. 5 V? Go to step 6.Go to step 3.
3CHECK AUTO A/C CONTROL MODULE
OUTPUT SIGNAL.
1) Turn the ignition switch to OFF.
2) Remove the auto A/C control module.
3) Turn the ignition switch to ON.
4) Measure the voltage between connector
terminals of auto A/C control module.
Connector & terminal
(B282) No. 13 (+) — No. 15 (–):
Is the voltage approx. 5 V? Go to step 4.Go to step 6.
4CHECK HARNESS CONNECTOR BETWEEN
AUTO A/C CONTROL MODULE AND EVAP-
ORATOR SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from auto A/C
control module.
3) Measure the resistance of harness
between auto A/C control module and evapo-
rator sensor.
Connector & terminal
(B88) No. 2 — (B282) No. 15:
Is the resistance less than 1
Ω?
Go to step 5.Repair the open
circuit of harness
between auto A/C
control module
and evaporator
sensor.
5CHECK HARNESS CONNECTOR BETWEEN
AUTO A/C CONTROL MODULE AND EVAP-
ORATOR SENSOR.
Measure the resistance of harness between
auto A/C control module and evaporator sen-
sor.
Connector & terminal
(B88) No. 1 — (B282) No. 13:
Is the resistance less than 1
Ω?
Go to step 6.Repair the open
circuit of harness
between auto A/C
control module
and evaporator
sensor.
6CHECK POOR CONTACT.
Check poor contact of auto A/C control module
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).>

AC(diag)-37
Diagnostic Procedure for Sensors
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
D: SUNLOAD SENSOR
TROUBLE SYMPTOM:
•Sensor identifies that sunlight is at maximum. Then, A/C system is controlled to COOL side.
•Sensor identifies that sunlight is at minimum. Then, A/C system is controlled to HOT side.
NOTE:
When the sunload sensor check is performed indoors or in the shade, it could be diagnosed as having an
open circuit. Always check the sunload sensor with the sun shining on it.
WIRING DIAGRAM:
AC-00832
A:B282
12345678910 11 12 13 14 15 16
i51
A:B282
A8A6
21
i3
B38
i51
12
AUTO A/C CONTROL MODULE
32
1234 5678910 11 12 13 14 15 16 17 18 19 20
B38
SUNLOADSENSOR

AC(diag)-38
Diagnostic Procedure for Sensors
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1CHECK POWER SUPPLY VOLTAGE FOR
SUNLOAD SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from sunload
sensor.
3) Turn the ignition switch to ON.
4) Measure the power supply voltage for sun-
load sensor.
Connector & terminal
(i51) No. 1 (+) — No. 2 (–):
Is the voltage approx. 5 V? Go to step 4.Go to step 2.
2CHECK HARNESS CONNECTOR BETWEEN
AUTO A/C CONTROL MODULE AND SUN-
LOAD SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from auto A/C
control module.
3) Measure the resistance of harness
between auto A/C control module and sunload
sensor.
Connector & terminal
(i51) No. 2 — (B282) No. 6:
Is the resistance less than 1
Ω?
Go to step 3.Repair the har-
ness between auto
A/C control mod-
ule and sunload
sensor.
3CHECK HARNESS CONNECTOR BETWEEN
AUTO A/C CONTROL MODULE AND SUN-
LOAD SENSOR.
Measure the resistance of harness between
auto A/C control module and sunload sensor.
Connector & terminal
(i51) No. 1 — (B282) No. 8:
Is the resistance less than 1
Ω?
Go to step 4.Repair the har-
ness between auto
A/C control mod-
ule and sunload
sensor.
4CHECK INPUT VOLTAGE FOR AUTO A/C
CONTROL MODULE.
1) Connect the connectors of sunload sensor
and auto A/C control module.
2) Turn the ignition switch to ON.
3) Measure the voltage between connector
terminals of auto A/C control module.
Connector & terminal
(B282) No. 8 (+) — (B282) No. 6 (–):
Is the voltage approx. 3.0 V? Go to step 5.Replace the sun-
load sensor. to AC-44,
REMOVAL, Sun-
load Sensor (Auto
A/C Model).>
5CHECK POOR CONTACT.
Check poor contact of auto A/C control module
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).>

AC(diag)-39
Diagnostics with Phenomenon
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
9. Diagnostics with Phenomenon
A: INSPECTION
Symptom Problem parts
A/C system fails to operate.
•Fuse (M/B No. 15, F/B No. 7, 22, 31)
•Connector (Poor contact)
•Ground
•Auto A/C control module
•Blower fan motor
•Blower fan relay
•A/C relay
•Compressor (Magnet clutch)
•Evaporator sensor
Fuse is blown out.•Fuse (M/B No. 8, F/B No. 22, 31)
•Connector (Poor contact)
Illumination cannot dim.
•Fuse (M/B No. 8, F/B No. 22, 31)
•Connector (Poor contact)
•Illumination control switch
•Auto A/C control module
•Body integrated unit
Blower fan does not rotate or fan speed cannot be controlled.
•Fuse (F/B No. 22, 27, 28)
•Connector (Poor contact)
•Ground
•Auto A/C control module
•Blower fan motor
•Blower fan relay
•Power transistor or blower resistor
Unable to switch suction vents.
•Connector (Poor contact)
•Auto A/C control module
•Intake door actuator
Unable to switch blow vents.
•Connector (Poor contact)
•Auto A/C control module
•Mode door actuator
The compar tment temperature does not rise. (Warm air not
emitted.)
•Connector (Poor contact)
•Auto A/C control module
•Air mix door actuator
•In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
•In-vehicle sensor aspirator hose
•Aspirator body
The compar tment temperature does not lower. (Cold air not
emitted.)
•Connector (Poor contact)
•Auto A/C control module
•Air mix door actuator
•A/C relay
•Compressor (Magnet clutch)
•Radiator fan motor
•Radiator fan relay
•In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
•In-vehicle sensor aspirator hose
•Aspirator body
Compartment temperature is higher or lower than setting tem-
perature.
•Auto A/C control module
•Air mix door actuator
•In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
•In-vehicle sensor aspirator hose
•Aspirator body

AC(diag)-40
Diagnostics with Phenomenon
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Compartment temperature does not quickly respond to setting
temperature.
•Air mix door actuator
•In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
•In-vehicle sensor aspirator hose
•Aspirator body
Radiator fan does not rotate during A/C operation.•Radiator fan motor
•Radiator fan relay
Seat heater does not run.
•Seat thermistor
•Seat heater relay
•Seat heater
•Auto A/C control module
•Front control panel
Symptom Problem parts

IDI-7
Combination Meter System
INSTRUMENTATION/DRIVER INFO
3. SYMPTOM CHART
CAUTION:
When measuring the voltage and resistance of each control module or sensor, use a tapered pin with
a diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert the pin more
than 2 mm (0.08 in).
4. CHECK POWER SUPPLY AND GROUND CIRCUIT
Symptom Repair order Note
Combination meter assembly does not
operate.
1. Power supply
2. Ground circuit
3. Combination meter
AND GROUND CIRCUIT, INSPECTION,
Combination Meter System.>
Speedometer does not operate. 1. VDCCM
2. Harness
3. Combination meter
INSPECTION, Combination Meter Sys-
tem.>
Ta c h o m e t e r d o e s n o t o p e r a t e . 1 . E C M
2. Harness
3. Combination meter
TROL MODULE (ECM), INSPECTION,
Combination Meter System.>
Fuel gauge does not operate. 1. Communication circuit
2. Fuel level sensor
3. Harness
4. Combination meter
SENSOR., INSPECTION, Combination
Meter System.>
Engine coolant temperature gauge does
not operate.
1. Communication circuit
2. Engine coolant temperature sensor
3. Harness
4. Combination meter
ANT TEMPERATURE SENSOR.,
INSPECTION, Combination Meter Sys-
tem.>
Error display is shown on the odo/trip
meter.
Communication circuit ERROR DISPLAY, INSPECTION, Combi-
nation Meter System.>
Step Check Yes No
1CHECK POWER SUPPLY FOR COMBINA-
TION METER.
1) Remove the combination meter. IDI-11, REMOVAL, Combination Meter.>
2) Disconnect the combination meter harness
connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 3, 4 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 2.Check the harness
for open or shor t
between the igni-
tion switch and
combination
meter.
2CHECK POWER SUPPLY FOR COMBINA-
TION METER.
Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 1, 2 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Check the harness
for open or shor t
between the fuse
and combination
meter.
3CHECK GROUND CIRCUIT OF COMBINA-
TION METER.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between combination meter connector and
chassis ground.
Connector & terminal
(i10) No. 15, 16 — Chassis ground:
Is the resistance less than 10
Ω?
Replace the meter
case assembly.
Repair the wiring
harness.

IDI-9
Combination Meter System
INSTRUMENTATION/DRIVER INFO
7. CHECK FUEL LEVEL SENSOR.
Step Check Yes No
1CHECK COMMUNICATION ERROR DIS-
PLAY.
1) Turn the ignition switch to ON.
2) Check that the error code is displayed in
odo/trip meter.
Is the error code “Er xx” dis-
played in odo/trip meter?
Check the commu-
nication circuit.
COMMUNICA-
TION ERROR
DISPLAY,
INSPECTION,
Combination
Meter System.>
Go to step 2.
2CHECK FUEL LEVEL SENSOR.
1) Remove the fuel level sensor. FU(H6DO)-45, REMOVAL, Fuel Level Sen-
sor.>
2) Measure the resistance between fuel level
sensor terminals when the float is in FULL or
EMPTY position.
Te r m i n a l s
No. 1 — No. 4:
Is the resistance 1.0 to 3.0 Ω
(FULL) and 31 to 33 Ω
(EMPTY)?
Go to step 3.Replace the fuel
level sensor.
3CHECK FUEL SUB LEVEL SENSOR.
1) Remove the fuel sub level sensor. FU(H6DO)-46, REMOVAL, Fuel Sub Level
Sensor.>
2) Measure the resistance between fuel sub
level sensor terminals when the float is in
FULL or EMPTY position.
Te r m i n a l s
No. 1 — No. 2:
Is the resistance 1.0 to 3.0 Ω
(FULL) and 61 to 63 Ω
(EMPTY)?
Go to step 4.Replace the fuel
sub level sensor.
4CHECK HARNESS BETWEEN FUEL SUB-
LEVEL SENSOR AND BODY INTEGRATED
MODULE.
1) Disconnect the connector from body inte-
grated unit.
2) Measure the resistance between fuel sub
level sensor harness connector terminal and
body integrated unit harness connector termi-
nal.
Connector & terminal
(R59) No. 1 — (B281) No. 19:
Is the resistance less than 10
Ω?
Go to step 5.Repair the wiring
harness.
5CHECK HARNESS BETWEEN FUEL LEVEL
SENSOR AND FUEL SUB LEVEL SENSOR.
Measure the resistance between fuel level sen-
sor harness connector terminal and fuel sub
level sensor harness connector terminal.
Connector & terminal
(R58) No. 1 — (R59) No. 2:
Is the resistance less than 10
Ω?
Go to step 6.Repair the wiring
harness.
6CHECK FUEL LEVEL SENSOR GROUND
CIRCUIT.
Measure the resistance between fuel level sen-
sor harness connector terminal and chassis
ground.
Connector & terminal
(R58) No. 4 — Chassis ground:
Is the resistance less than 10
Ω?
Replace the meter
case assembly.
Repair the wiring
harness.

IDI-10
Combination Meter System
INSTRUMENTATION/DRIVER INFO
8. CHECK ENGINE COOLANT TEMPERATURE SENSOR.
9. COMMUNICATION ERROR DISPLAY
When the following error code is displayed in the
odo/trip meter, inspect the communication circuit
since the communication malfunction is generated
between each control module. 2, Basic Diagnostic Procedure.>
10.DTC DISPLAY MODE
When DTC display mode is operated, {ECM}, {TCM} is displayed repeatedly in this order by pressing the trip
knob. DTC is displayed in the following table according to type of control module, receiving DTC, DTC de-
tected, No DTC. If CAN communication has some trouble, “-----” is displayed.
Step Check Yes No
1CHECK COMMUNICATION ERROR DIS-
PLAY.
1) Turn the ignition switch to ON.
2) Check that the error code is displayed in
odo/trip meter.
Is the error code “Er xx” dis-
played in odo/trip meter?
Check the commu-
nication circuit.
COMMUNICA-
TION ERROR
DISPLAY,
INSPECTION,
Combination
Meter System.>
Go to step 2.
2CHECK ENGINE COOLANT TEMPERATURE
SENSOR.
Check the engine coolant temperature sensor.
Procedure.>
Is the engine coolant tempera-
ture sensor OK?
Replace the meter
case assembly.
Replace the
engine coolant
temperature sen-
sor.
IDI00188
Error code Description
Er IUMalfunction in integrated
module
Er ––
Simultaneous malfunction of
high/low speed CAN com-
munication
Er HCHigh speed CAN communi-
cation malfunction
Er LCMalfunction of low-speed
CAN communication
Er EGEGI Communication mal-
function
Er TCTCM Communication mal-
function
Er AbVDCCM communication
malfunction
Er SP
VDCCM DTC information
and vehicle speed pulse
malfunction
Er SSWheel speed data malfunc-
tion
Er bbVa c u u m p u m p s y s t e m m a l -
function
Control module Condition Display
ECM
Receiving DTC Trip “A” + “P (Blink)”
DTC detected Trip “A” + “P xxxx”
No DTC Trip “A” + “P ----”
TCM
Receiving DTC Trip “B” + “P (Blink)”
DTC detected Trip “B” + “P xxxx”
No DTC Trip “B” + “P ----”
When CAN communication error
is occurred—“-----”