2009 SUBARU TRIBECA ecm

CO(H6DO)-7
Radiator Fan System
COOLING
2. Radiator Fan System
A: WIRING DIAGRAM
CO-02209
RADIATOR FANCONTROL UNIT
132
B136
ECM
16
F109
F106
7
B360
2918
F106
123
B7
E
SBF-6MAIN SBF
NO.2
NO.26
B143B:
F36E:
E6
3127456
F36E:B143
123456712131415161718
B:
8191192010
EM
SUB FAN MOTORMAIN FAN MOTOR
THROUGH JOINTCONNECTOR
MAIN FANRELAY 1
MAIN FUSEBOX (M/B)
IGNITIONSWITCH
F17F11112
M
12
F111
F17
12
F109
3412 8910 1112 13 14 15 16 17 18 19 20 21 22 23 24567
B136
16101112131415252430
9871718192028212223293231
123456
2726333435
B360
12345678910111213141516

CO(H6DO)-8
Radiator Fan System
COOLING
B: RADIATOR FAN CONTROL OUTPUT WAVEFORM
C: INSPECTION
DETECTING CONDITION:
•Engine coolant temperature is more than 95°C (203°F).
•A/C switch is turned OFF.
•Vehicle speed is below 19 km/h (12 MPH).
TROUBLE SYMPTOMS:
Radiator main fan and sub fan do not rotate under the above conditions.
(A) 5 V
Step Check Yes No
1CHECK MAIN FAN RELAY 1.
1) Turn the ignition switch to OFF.
2) Remove the main fan relay 1 from A/C relay
holder.
3) Measure the resistance of terminal in main
fan relay 1 switch.
Is the resistance more than 1
MΩ?
Go to step 2.Replace the main
fan relay 1.
2CHECK MAIN FAN RELAY 1.
1) Connect the battery to terminal of main fan
relay 1 coil.
2) Measure the resistance between terminals
of main fan relay 1 switch.
Is the resistance less than 1
Ω?
Go to step 3.Replace the main
fan relay 1.
3CHECK POWER SUPPLY FOR ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Turn the ignition switch ON.
4) Measure the voltage between ECM termi-
nal and chassis ground.
Connector & terminal
(B136) No. 29 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 4.Repair the power
supply line.
CO-02117
(V)
0
(A)

CO(H6DO)-9
Radiator Fan System
COOLING
4CHECK POWER SUPPLY FOR RADIATOR
FAN CONTROL UNIT.
1) Turn the ignition switch to OFF.
2) Connect the connector to ECM.
3) Disconnect the connector from radiator fan
control unit.
4) Turn the ignition switch ON.
5) Measure the voltage between radiator fan
control unit terminal and chassis ground.
Connector & terminal
(F106) No. 3 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 5.Repair the power
supply line.
5CHECK HARNESS BETWEEN ECM AND RA-
DIATOR FAN CONTROL UNIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Measure the resistance between radiator
fan control unit and ECM connector.
Connector & terminal
(B136) No. 18 — (F106) No. 2:
Is the resistance less than 1
Ω?
Go to step 6.Repair the open
circuit of harness
between ECM and
radiator fan con-
trol unit.
6CHECK RADIATOR FAN CONTROL UNIT
AND GROUND CIRCUIT.
1) Connect the connector to ECM and radiator
fan control unit.
2) Measure the resistance between radiator
fan control unit connector and chassis ground.
Connector & terminal
(F106) No. 1 — Chassis ground:
Is the resistance less than 5
Ω?
Go to step 7.Repair the open
circuit of harness
between radiator
fan control unit
connector and
chassis ground.
7CHECK MAIN FAN MOTOR.
1) Disconnect the connector from radiator fan
control unit.
2) Connect the battery positive (+) terminal to
terminal No. 1 of the main fan motor, and the
ground (–) terminal to terminal No. 2.
Does the main fan motor
rotate?
Go to step 8.Replace the main
fan motor.
8CHECK SUB FAN MOTOR.
1) Disconnect the connector from radiator fan
control unit.
2) Connect the battery positive (+) terminal to
terminal No. 1 of the sub fan motor, and the
ground (–) terminal to terminal No. 2.
Does the sub fan motor rotate? Go to step 9.Replace the sub
fan motor.
9CHECK OUTPUT SIGNAL FROM ECM.
1) Turn the ignition switch to OFF.
2) Connect the test mode connector.
3) Turn the ignition switch ON.
4) Check the output waveform using oscillo-
scope. CONTROL OUTPUT WAVEFORM, Radiator
Fa n S y st e m. >
Connector & terminal
(B134) No. 18 (+) — Chassis ground (–):
Is waveform being output? Replace the radia-
tor fan control unit.
CO(H6DO)-29,
Radiator Fan Con-
trol Unit.>
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>
Step Check Yes No

EN(H6DO)(diag)-5
General Description
ENGINE (DIAGNOSTICS)
3. General Description
A: CAUTION
1) Airbag system wiring harness is routed near the
ECM, main relay and fuel pump relay.
CAUTION:
•All airbag system wiring harnesses and con-
nectors are colored yellow. Do not use electri-
cal test equipment on these circuits.
•Be careful not to damage the airbag system
wiring harness when servicing the ECM, TCM,
main relay and fuel pump relay.
2) Never connect the battery in reverse polarity.
•The ECM will be destroyed instantly.
•The fuel injector and other parts will be dam-
aged.
3) Do not disconnect the battery terminals while the
engine is running.
A large counter electromotive force will be generat-
ed in the generator, and this voltage may damage
electronic parts such as ECM etc.
4) Before disconnecting the connectors of each
sensor and ECM, be sure to turn the ignition switch
to OFF. Perform the clear memory mode after con-
necting the connectors.
5) Poor contact has been identified as a primary
cause of this problem. Measure the voltage or re-
sistance of individual sensor or all electrical control
modules using a tapered pin with a diameter of less
than 0.64 mm (0.025 in). Do not insert the pin more
than 5 mm (0.20 in) into the part.
6) Remove the ECM from the located position after
disconnecting two cables on battery.
Otherwise, the ECM may be damaged.
CAUTION:
When replacing the ECM, be careful not to use
the wrong spec. ECM to avoid any damage on
the fuel injection system.
7) Connectors of each sensor in the engine com-
partment and the harness connectors on the en-
gine side and body side are all designed to be
waterproof. Even if the connectors are waterproof,
take care not to allow water to get into them when
washing the vehicle, or when servicing the vehicle
in rainy weather.
8) Use ECM mounting stud bolts as the grounding
point to chassis when measuring voltage and resis-
tance in the passenger compartment.
9) Use the engine ground terminal or engine as-
sembly as the grounding point to chassis when
measuring the voltage and resistance in engine
compartment.
10) Every MFI-related part is a precision part. Do
not drop them.
11) Observe the following cautions when installing
a radio in MFI equipped models.
CAUTION:
•The antenna must be kept as far apart as pos-
sible from control unit. (The ECM is located un-
der the steering column, inside of the
instrument panel lower trim panel.)
•The antenna feeder must be placed as far apart
as possible from the ECM and MFI harness.
•Carefully adjust the antenna for correct
matching.
•When mounting a large power type radio, pay
special attention to the three items mentioned
above.
•Incorrect installation of the radio may affect
the operation of ECM.
12) Release the pressure in the fuel system before
disconnecting the fuel hose. If engine starts during
this operation, run it until it stops.
13) For the model with ABS, the ABS warning light
may illuminate when performing driving test with
jacked-up or lifted-up condition, but this is not a
system malfunction. The reason for this is the
speed difference between the front and rear
wheels. After diagnosis of engine control system,
perform the ABS memory clear procedure of self-
diagnosis function.
B: INSPECTION
Before performing diagnostics, check the following
item which might affect engine problems.
1. BATTERY
1) Measure the battery voltage and specific gravity
of electrolyte.
Standard voltage: 12 V
Specific gravity: Above 1.260
2) Check the condition of the main and other fuses,
and harnesses and connectors. Also check for
proper grounding.
2. ENGINE GROUND
Make sure the engine ground terminal is properly
connected to engine.
EN-02473

EN(H6DO)(diag)-8
Electrical Component Location
ENGINE (DIAGNOSTICS)
4. Electrical Component Location
A: LOCATION
1. ENGINE
•Control module
(1) Engine control module (ECM) (3) Test mode connector (4) Data link connector
(2) Malfunction indicator light
EN-03679
(1)
(4)
(3)
(2)
EN-03680
(1)
EN-03681
CHECKENGINE
(2)
x1000/min
EN-03682
(3)
EN-03683
(4)

EN(H6DO)(diag)-16
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
ReferenceIgnition SW ON
(engine OFF)
Engine ON
(idling)
Crankshaft Position
Sensor
Signal (+) B134 13 0 –7 — +7 Waveform
Signal (–) B134 14 0 0 —
Shield B134 24 0 0 —
Camshaft position sensor (LH) B134 11 0.275 0 or 5 Waveform
Camshaft position sensor (RH) B134 21 0.275 0 or 5 Waveform
Camshaft position sensor
(ground)B134 22 0 0 —
Electronic throttle
control
Main B134 180.64 — 0.94
Fully opened: 4.01
0.64 — 0.72
(After engine is
warmed-up.)
Fully closed: 0.6
Fully opened: 4.01
Sub B134 281.51 — 1.76
Fully opened: 4.23
1.51 — 1.58
(After engine is
warmed-up.)
Fully closed: 1.48
Fully opened: 4.23
Electronic throttle control motor
(+)B137 5 Duty waveform Duty waveformDrive frequency: 500
Hz
Electronic throttle control motor (–) B137 4 Duty waveform Duty waveformDrive frequency: 500
Hz
Electronic throttle control motor
power supplyB136 1 10 — 13 12 — 14 —
Electronic throttle control motor
relayB136 21ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
When ignition switch
is turned to ON: ON
Accelerator pedal
position sensor
Main B135 23Fully closed: 0.7
Fully opened: 3.5
Fully closed: 0.7
Fully opened: 3.5—
Powe r s up -
ply (main)B135 21 5 5 —
Ground
(main)B135 29 0 0 —
Sub B135 31Fully closed: 0.7
Fully opened: 3.5
Fully closed: 0.7
Fully opened: 3.5—
Engine coolant temperature sen-
sorB134 34 1.0 — 1.4 1.0 — 1.4After engine is
warmed-up.
EN-01812
B134
5678219431024 2223251112131415262728
1617181920213334 2932 3031
B136
5678219431024 2223251112131415262728
16171819202133342932303135
B135
5678219431024 2223251112131415262728
16171819202129303132333435
B137
5678219431022231112131415242526
1617181920212728293031
ToToToTo

EN(H6DO)(diag)-17
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
Starter switch B136 32 0 0 Cranking: 8 — 14
Starter relay B136 20ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14—
A/C switch B136 24ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0—
A/C middle pressure switch B136 33ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14—
Ignition switch B135 19 10 — 13 13 — 14 —
Neutral position switch B136 31ON: 0
OFF: 12±0.5
Switch is ON when
select lever is shifted
into “P” or “N” range.
Te s t m o d e c o n n e c t o r B 1 3 5 2 7 1 0 — 1 3 1 2 — 1 4 W h e n c o n n e c t e d : 0
Knock sensor 1Signal B134 15 2.4 2.4 —
Shield B134 25 0 0 —
Knock sensor 2Signal B134 16 2.4 2.4 —
Shield B134 25 0 0 —
Back-up power supply B135 5 10 — 13 13 — 14Ignition switch
“OFF”: 10 — 13
Control module power supplyB134 7 10 — 13 13 — 14 —
B135 2 10 — 13 13 — 14 —
Sensor power supply (engine
side)B134 19 5 5 —
Sensor ground (engine side) B134 29 0 0 —
Sensor power supply (body side) B135 22 5 5 —
Sensor ground (body side) B135 30 0 0 —
Ignition control
#1 B137 18 0 1 — 14 Waveform
#2 B137 19 0 1 — 14 Waveform
#3 B137 20 0 1 — 14 Waveform
#4 B137 21 0 1 — 14 Waveform
#5 B137 22 0 1 — 14 Waveform
#6 B137 23 0 1 — 14 Waveform
Fuel Injector
#1 B137 8 10 — 13 1 — 14 Waveform
#2 B137 9 10 — 13 1 — 14 Waveform
#3 B137 10 10 — 13 1 — 14 Waveform
#4 B137 11 10 — 13 1 — 14 Waveform
#5 B137 12 10 — 13 1 — 14 Waveform
#6 B137 13 10 — 13 1 — 14 Waveform
A/C relay control B136 9ON: 0.5 or less
OFF: 10 — 13
ON: 0.5 or less
OFF: 13 — 14—
Radiator fan control B136 18ON: 0.5 or less
OFF: 10 — 13
ON: 0.5 or less
OFF: 13 — 14—
Radiator fan control power supply B136 29ON: 0.5 or less
OFF: 10 — 13
ON: 0.5 or less
OFF: 13 — 14—
Self-shutoff control B136 23 0 0 —
Malfunction indicator light B136 11 — —Light: 1 or less
Extinguish: 10 — 14
Engine speed output B136 22 — 0 — 13 or more Waveform
Purge control solenoid valve B137 29ON: 1 or less
OFF: 10 — 13
ON: 1 or less
OFF: 13 — 14—
Pow er s te e r in g sw it c h B 1 3 4 33ON: 1 or less
OFF: 10 — 13
ON: 1 or less
OFF: 13 — 14—
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
ReferenceIgnition SW ON
(engine OFF)
Engine ON
(idling)

EN(H6DO)(diag)-18
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
Manifold absolute pressure sen-
sorB134 6 3.5 — 4.8 1.1 — 1.9 —
Air flow sensor
Signal B135 26 0.74 0.3 — 4.5 —
Shield B135 35 0 0 —
Ground B135 34 0 0 —
Intake air temperature sensor B135 18 3.15 — 3.33 3.15 — 3.33Intake air tempera-
ture 25°C (75°F)
Fr o nt ox yg e n ( A / F)
sensor RH
Signal (+) B135 9 2.8 — 3.2 2.8 — 3.2 —
Signal (–) B135 8 2.4 — 2.7 2.4 — 2.7 —
Shield B135 1 0 0 —
Fr o nt ox yg e n ( A / F)
sensor heater RH
Signal 1 B136 3 12 — 14 — Waveform
Signal 2 B136 2 12 — 14 — Waveform
Fr o nt ox yg e n ( A / F)
sensor LH
Signal (+) B135 11 2.8 — 3.2 2.8 — 3.2 —
Signal (–) B135 10 2.4 — 2.7 2.4 — 2.7 —
Shield B135 1 0 0 —
Fr o nt ox yg e n ( A / F)
sensor heater LH
Signal 1 B135 7 12 — 14 — Waveform
Signal 2 B135 6 12 — 14 — Waveform
Rear oxygen sen-
sor RH
Signal B135 4 0 0 — 0.9 —
Shield B135 1 0 0 —
Rear oxygen sensor heater RH
signalB136 4 12 — 14 — Waveform
Rear oxygen sen-
sor LH
Signal B135 15 0 0 — 0.9 —
Shield B135 1 0 0 —
Rear oxygen sensor heater LH
signalB136 5 12 — 14 — Waveform
Immobilizer communication 1 B136 26 10 10 —
Immobilizer communication 2 B136 34 10 10 —
Fuel pump control
unit
Diagnosis
signalB135 33 10 — 13 13 — 14 —
Control B136 12 0 0 or 5 —
Brake switch 1 B135 20
When brake pedal is
depressed: 0
When brake pedal is
released: 10 — 13
When brake pedal is
depressed: 0
When brake pedal is
released: 13 — 14
—
Brake switch 2 B135 28
When brake pedal is
depressed: 10 — 13
When brake pedal is
released: 0
When brake pedal is
depressed: 13 — 14
When brake pedal is
released: 0
—
Cruise control command switch B135 24
When operating
nothing: 3.5 — 4.5
When operating
RES/ACC: 2.5 — 3.5
When operating SET/
COAST: 0.5 — 1.5
When operating
CANCEL: 0 — 0.5
When operating
nothing: 3.5 — 4.5
When operating
RES/ACC: 2.5 — 3.5
When operating SET/
COAST: 0.5 — 1.5
When operating
CANCEL: 0 — 0.5
—
Cruise control main switch B135 12ON: 0
OFF: 5
ON: 0
OFF: 5—
Oil flow control sole-
noid valve RH
Signal (+) B137 17 0 0.6 —
Signal (–) B137 16 0 0 —
Oil flow control sole-
noid valve LH
Signal (+) B137 15 0 0.6 —
Signal (–) B137 14 0 0 —
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
ReferenceIgnition SW ON
(engine OFF)
Engine ON
(idling)