2009 SUBARU TRIBECA check engine light

5AT(diag)-73
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 17 — (B11) No. 15:
(B55) No. 8 — (B11) No. 4:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω?
Go to step 2.Repair the open
circuit of harness
between TCM and
transmission con-
nector.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 8 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 3.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
3CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (Engine
OFF)
3) Check the input signal of the H&LR/C oil
pressure SW.
Is OFF displayed? Go to step 4.Go to step 6.
4CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (Engine ON)
3) Shift to “D” range and brake ON (1st) with
checking current gear position using Subaru
Select Monitor.
4) Check the input signal of the H&LR/C oil
pressure SW.
Is ON displayed? Even if the SPORT
indicator light
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
poor contact of
harness in the
solenoid output
and oil pressure
SW input.
Go to step 5.

5AT(diag)-78
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 22 — (B11) No. 16:
(B54) No. 21 — (B11) No. 10:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω?
Go to step 2.Repair the open
circuit of harness
between TCM and
transmission con-
nector.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND BODY HARNESS.
Measure the resistance of harness between
TCM connector and body harness.
Connector & terminal
(B54) No. 21 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 3.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
3CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (Engine
OFF)
3) Check input signal of D/C oil pressure SW.
Is OFF displayed? Go to step 4.Go to step 6.
4CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (Engine ON)
3) Shift to 2nd speed of manual mode and
brake ON with checking current gear position
using Subaru Select Monitor.
4) Check input signal of D/C oil pressure SW.
Is ON displayed? Even if the SPORT
indicator light
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
poor contact of
harness in the
solenoid output
and oil pressure
SW input.
Go to step 5.

5AT(diag)-83
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 15 — (B11) No. 13:
(B54) No. 12 — (B11) No. 9:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω?
Go to step 2.Repair the open
circuit of harness
between TCM and
transmission con-
nector.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 12 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 3.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
3CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (Engine
OFF)
3) Check input signal of LC/B oil pressure SW.
Is OFF displayed? Go to step 4.Go to step 6.
4CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (Engine ON)
3) Drive the vehicle on 2nd speed of manual
mode 15 km/h (9 MPH) with checking current
gear position using Subaru Select Monitor.
4) Check input signal of LC/B oil pressure SW.
Is ON displayed? Even if the SPORT
indicator light
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
poor contact of
harness in the
solenoid output
and oil pressure
SW input.
Go to step 5.

5AT(diag)-90
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7CHECK OUTPUT SIGNAL OF TCM.
1) Lift-up the vehicle and support with rigid
racks.
NOTE:Raise all wheels off floor.
2) Start the engine.
3) Shift the select lever to “D” range and
slowly increase vehicle speed to 20 km/h (12
MPH).
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
indicates no malfunction. When AT control di-
agnosis is finished, perform the VDC memory
clearance procedure of on-board diagnostics
system. ORY MODE, OPERATION, Subaru Select
Monitor.>
4) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B55) No. 15 (+) — Chassis ground (–):
Is the voltage less than 1 V? Even if the SPORT
indicator light up,
the circuit has
returned to nor-
mal condition at
this time. A tempo-
rary poor contact
of connector or
harness may be
the cause. Repair
the harness or
connector in
reverse inhibitor
control circuit.
Go to step 8.
8CHECK POOR CONTACT.Is there poor contact in the
reverse inhibitor control circuit?
Repair the poor
contact.
Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
Step Check Yes No

5AT(diag)-94
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
2CHECK INPUT VOLTAGE FOR PVIGN RE-
LAY.
Measure the voltage between PVIGN relay and
chassis ground.
Connector & terminal
(B357) No. 2 (+) — Chassis ground (–):
(B357) No. 3 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Go to step 3.Repair the open
circuit of harness
between fuse (No.
12) and PVIGN
relay.
3CHECK HARNESS BETWEEN PVIGN RE-
LAY OF TCM.
Measure the resistance between TCM connec-
tor and PVIGN relay connector.
Connector & terminal
(B54) No. 10 — (B357) No. 1:
(B54) No. 7 — (B357) No. 4:
(B54) No. 8 — (B357) No. 4:
Is the resistance less than 1
Ω?
Go to step 4.Repair the open
circuit of harness.
4CHECK PVIGN POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground (–):
(B54) No. 8 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Temporary poor
contact. Recheck
the harness
between TCM and
relay. (Lightly
move the harness
and check that the
open or short cir-
cuit is not
occurred.)
Go to step 5.
5CHECK PVIGN RELAY OUTPUT OF TCM.
Measure the voltage between TCM connector
and chassis ground.
Connector & terminal
(B55) No. 11 (+) — Chassis ground (–):
Is the voltage less than 1.5 V? Replace the
PVIGN relay.
Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
Step Check Yes No

5AT(diag)-96
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK DTC OF TCM.Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
back-up light relay.
3) Measure the resistance of harness
between TCM connector and back-up light
relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
Is the resistance less than 1
Ω?
Go to step 3.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
3CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 4.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
4CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Move the select lever to “P” range.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage more than 10 V? Go to step 5.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
5CHECK TCM OUTPUT SIGNAL.
1) Set the select lever to “R” range.
2) Is the voltage less than 1 V?
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage 1.0 — 2.0 V? Go to step 6.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
6CHECK INPUT VOLTAGE FOR BACK-UP
LIGHT RELAY.
Measure the voltage between back-up light
relay and chassis ground.
Is the voltage 10 — 13 V? Replace the back-
up light relay.
Check open or
short circuit of har-
ness between fuse
(No. 18) and back-
up light relay.

5AT(diag)-98
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK DTC OF TCM.Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
back-up light relay.
3) Measure the resistance of harness
between TCM connector and back-up light
relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
Is the resistance less than 1
Ω?
Go to step 3.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
3CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 4.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
4CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Move the select lever to “P” range.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage more than 10 V? Go to step 5.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
5CHECK TCM OUTPUT SIGNAL.
1) Set the select lever to “R” range.
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage 1.0 — 2.0 V or
below?
Go to step 6.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
6CHECK INPUT VOLTAGE FOR BACK-UP
LIGHT RELAY.
Measure the voltage between back-up light
relay and chassis ground.
Is the voltage 10 — 13 V? Replace the back-
up light relay.
Check open or
short circuit of har-
ness between fuse
(No. 18) and back-
up light relay.

5AT(diag)-103
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid
racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and drive the vehicle.
4) Read the current data of front wheel speed
using Subaru Select Monitor. 5AT(diag)-15, OPERATION, Subaru Select
Monitor.>
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
indicates no malfunction. When AT control di-
agnosis is finished, perform the VDC memory
clearance procedure of on-board diagnostics
system. ORY MODE, OPERATION, Subaru Select
Monitor.>
Does the value of the front
wheel speed depending on the
acceleration and deceleration
of the vehicle?
Even if the SPORT
indicator light
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair poor
contact of har-
ness in ATF tem-
perature sensor
and transmission
connector.
Replace the trans-
mission harness.
Step Check Yes No