2009 SUBARU TRIBECA ac 25 procedure

5AT(diag)-52
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
H: DTC P0725 ENGINE SPEED INPUT CIRCUIT
DTC DETECTING CONDITION:
Information of engine speed is not correctly received from ECM.
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
I: DTC P0731 GEAR 1 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
J: DTC P0732 GEAR 2 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
K: DTC P0733 GEAR 3 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
L: DTC P0734 GEAR 4 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
M: DTC P0735 GEAR 5 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Step Check Yes No
1CHECK DTC OF ECM.Is DTC of AT CAN communica-
tion circuit detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK DTC OF TCM.Is DTC of AT CAN communica-
tion circuit detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 3.
3CHECK DTC OF TCM.Is any of following DTC
detected?/Output Speed Sen-
sor Circuit/AT Vehicle Speed
Sensor Circuit Malfunction
(Rear Wheel)
Pe r for m t h e d ia g -
nosis according to
DTC.
Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>

5AT(diag)-53
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
N: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
Target gear ratio and actual gear ratio do not match.
TROUBLE SYMPTOM:
•Shift point is too high or too low.
•Excessive shift shock.
•Gear is not changed.
•The vehicle does not move in D or R range with the engine running at high speed.
Step Check Yes No
1CHECK DTC OF TCM.Is any DTC of the followings
detected? P0715, P0720,
P0753, P0758, P0763, P0768,
P0773, P0751, P0756, P0761,
P0766, P0771, P1706, P1710,
P1798, P1799
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK TURBINE SPEED SENSOR USING
SUBARU SELECT MONITOR.
1) Lift-up the vehicle and support with rigid
racks.
NOTE:Raise all wheels off floor.
2) Start the engine, and drive it.
3) Read the current data of torque converter
turbine speed using Subaru Select Monitor.
DATA, OPERATION, Subar u 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 displayed value of the
Subaru Select Monitor change
according to engine speed and
shifting?
Go to step 3.Perform the diag-
nosis according to
DTC P0715,
P1710.
3CHECK FRONT AND REAR VEHICLE
SPEED SENSORS.
Do the values displayed for
each of the Subaru Select
Monitor and the speedometer
substantially match?
Go to step 4.Perform the diag-
nosis according to
DTC P0720,
P1706.
4CHECK INHIBITOR SWITCH.Do the values displayed for the
Subaru Select Monitor and the
meter indicator match?
Go to step 5.Perform the diag-
nosis according to
DTC P0705.
5DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After restarting the engine, check that the
SPORT indicator light is not blinking, and per-
form a drive check based on the inspection
mode. Inspection Mode.>
Is DTC displayed again? Check the DTC.
Then, when pro-
ceeded again to
step 5, go to step
6.
Go to step 6.
6CHECK AFTER REPAIR.Is the trouble symptom inre-
pairable (malfunction in shifting
such as excessive shift shock,
engine speed increases exces-
sively when shifting)?
Replace the trans-
mission assembly.
Te m p o r a r y p o o r
contact occurs.
Check that the
harness connec-
tor is not faulty.

5AT(diag)-54
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
O: DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR
STUCK OFF
DTC DETECTING CONDITION:
•Defective lock-up clutch or torque converter assembly
•Defective control valve
•Defective turbine speed sensor 1 or 2
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
Step Check Yes No
1CHECK DTC OF TCM.Is any DTC of the followings
detected? P0715, P0725,
P0753, P0758, P0763, P0768,
P0773, P0751, P0756, P0761,
P0766, P0771, P1710, P1718,
P1798, P1799
Pe r for m t h e d ia g -
nosis according to
each DTC.
Go to step 2.
2DRIVING CHECK FOR LOCK-UP CONDI-
TION
1) Perform a drive check based on the inspec-
tion mode with the following conditions. to 5AT(diag)-19, PROCEDURE, Inspection
Mode.>
(1) Read the current data of throttle open-
ing angle using Subaru Select Monitor.
DATA, O PER ATION, Subar u Select Moni-
tor.>
(2) Keep the same vehicle speed at 60 km/
h with 10% or less throttle opening angle
which is read currently on Subaru Select
Monitor. CURRENT DATA, OPERATION, Subaru
Select Monitor.>
(3) Read the current data of L/U solenoid
target pressure using Subaru Select Moni-
tor. RENT DATA, OPERATION, Subaru Select
Monitor.>
(4) Check the engine speed and turbine
speed when the L/U solenoid target value
displayed on Subaru Select Monitor is 500
kPa or more.
Are the engine speed and tur-
bine speed almost the same?
Te m p o r a r y p o o r
contact or open
circuit occurs.
Recheck that the
harness connec-
tor has no faulty.
Go to step 3.

5AT(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
3DRIVING CHECK FOR LOCK-UP CONDI-
TION
1) Clear the memory. OPERATION, Subaru Select Monitor.>
2) Perform a drive check based on the inspec-
tion mode with the following conditions. to 5AT(diag)-19, PROCEDURE, Inspection
Mode.>
(1) Read the current data of throttle open-
ing angle using Subaru Select Monitor.
DATA, O PER ATION, Subar u Select Moni-
tor.>
(2) Keep the same vehicle speed at 60 km/
h with 10% or less throttle opening angle
which is read currently on Subaru Select
Monitor. CURRENT DATA, OPERATION, Subaru
Select Monitor.>
(3) Read the current data of L/U solenoid
target pressure using Subaru Select Moni-
tor. RENT DATA, OPERATION, Subaru Select
Monitor.>
(4) Drive the vehicle continuously for one
minutes or more with the L/U solenoid tar-
get value displayed on Subaru Select Moni-
tor at 500 kPa or more.
3) Turn the ignition switch to OFF.
4) Turn the ignition switch to ON. (Engine ON)
5) Perform the step 2) again.
Is DTC P0741 displayed with
the SPORT indicator light
blinking?
Replace the trans-
mission assembly
when DTC P0741
is displayed.
When DTC other
than P0741 is dis-
played, perform
the diagnosis cor-
responding to the
DTC.
Te m p o r a r y p o o r
contact or open
circuit occurs.
Recheck that the
harness connec-
tor has no faulty.
Step Check Yes No

5AT(diag)-56
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
P: DTC P0743 TORQUE CONVERTER CLUTCH CIRCUIT ELECTRICAL
DTC DETECTING CONDITION:
The output signal circuit of lock up solenoid is open or shorted.
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
WIRING DIAGRAM:
AT-02076
B54
23
B11
T4
TCM
B54
B11
125678
131415169101112
34
17181920
TRANSMISSION
12789563410 11 1219 20 2113 14 15 16 17 18222324
6T6
12586910 113412
T6
7
20
514
E

5AT(diag)-57
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 connector and transmission
connector.
Connector & terminal
(B54) No. 23 — (B11) No. 20:
(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 con-
nector and trans-
mission connector.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 23 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 3.Repair the short
circuit of harness
between TCM con-
nector and trans-
mission connector.
3CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Remove the transmission connector from
bracket.
4) Lift-up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
NOTE:Do not drain ATF until it cools down.
6) Remove the oil pan, and disconnect the
control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T4) No. 20 — (T6) No. 6:
Is the resistance less than 1
Ω?
Go to step 4.Repair the open
circuit of harness
between transmis-
sion connector
and control valve
body connector.
4CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis
ground and control valve body connector.
Connector & terminal
(T6) No. 6 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 5.Repair the short
circuit of harness
between control
valve body con-
nector and trans-
mission ground.
5CHECK LOCK-UP SOLENOID.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T6) No. 6 — Transmission ground:
Is the resistance between 3 —
9 Ω?
Go to step 6.Replace the con-
trol valve body.
Control Valve
Body.>

5AT(diag)-58
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6CHECK POOR CONTACT.
Check that there are no poor contact in TCM
connector, transmission connector and control
valve body connector.
Is there any loosing terminal,
entering foreign matter, dam-
aging connector body?
Repair the poor
contact.
Go to step 7.
7CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and check
that there is no faulty.
Is DTC displayed? Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
Te m p o r a r y p o o r
contact or open
circuit occurs.
Recheck that the
harness connec-
tor has no faulty.
Step Check Yes No

5AT(diag)-59
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Q: DTC P0748 PRESSURE CONTROL SOLENOID “A” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of line pressure solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock
WIRING DIAGRAM:
AT-02077
B54
E
5149
B11
TCM
B54
B11
125678
131415169101112
34
17181920
TRANSMISSION
12789563410 11 1219 20 2113 14 15 16 17 18222324
T4
7T6
12586910 113412
T6
7
19