2009 SUBARU TRIBECA P0756

5AT(diag)-29
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
P0743To r q u e C o n v e r t e r C l u t c h
Circuit Electrical
L/U solenoid circuit malfunction
or L/U solenoid body malfunction
CONVERTER CLUTCH CIRCUIT ELECTRI-
CAL, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0748Pressure Control Sole-
noid “A” Electrical
Line pressure solenoid circuit
malfunction or line pressure sole-
noid body malfunction
CONTROL SOLENOID “A” ELECTRICAL, Diag-
nostic Procedure with Diagnostic Trouble Code
(DTC).>
P0751Shift Solenoid “A” Perfor-
mance or Stuck Off
Fr/B Solenoid Function Malfunc-
tion
SOLENOID “A” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0753Shift Solenoid “A” Elec-
trical
Fr/B solenoid circuit malfunction
or Fr/B solenoid body malfunction
SOLENOID “A” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0756Shift Solenoid “B” Perfor-
mance or Stuck Off
Shift Solenoid “B” Performance
malfunction
SOLENOID “B” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0758Shift Solenoid “B” Elec-
trical
I/C solenoid circuit malfunction or
I/C solenoid body malfunction
SOLENOID “B” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0761Shift Solenoid “C” Perfor-
mance or Stuck OffH&LR/C solenoid malfunction
SOLENOID “C” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0763Shift Solenoid “C” Elec-
trical
H&LR/C solenoid circuit malfunc-
tion or H&LR/C solenoid body
malfunction
SOLENOID “C” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0766Shift Solenoid “D” Perfor-
mance or Stuck OffD/C solenoid malfunction
SOLENOID “D” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0768Shift Solenoid “D” Elec-
trical
D/C solenoid circuit malfunction
or D/C solenoid body malfunction
“D” ELECTRICAL, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0771Shift Solenoid “E” Perfor-
mance or Stuck OffLC/B solenoid malfunction
SOLENOID “E” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0773Shift Solenoid “E” Elec-
trical
•LC/B solenoid circuit malfunc-
tion or LC/B solenoid body mal-
function
•OFF malfunction of PVIGN
relay circuit or relay body
SOLENOID “E” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0801Reverse Inhibit Control
Circuit
•Shift lock solenoid is faulty or
output signal circuit is open or
shorted.
•Blown out of TCM+B fuse
INHIBIT CONTROL CIRCUIT, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0817 Starter Disable Circuit
•PN signal output circuit is open
or shorted.
•ECM Source Voltage Is Abnor-
mal
•Blown out of TCM+B fuse
DISABLE CIRCUIT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0882TCM Power Input Signal
Low
PVIGN relay output circuit is
open, shorted or relay malfunc-
tion
POWER INPUT SIGNAL LOW, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
DTC Item Content of diagnosis Reference target

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)-67
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
T: DTC P0756 SHIFT SOLENOID “B” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal value of input clutch solenoid and oil pressure does not match.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
AT-02995
B54
B11
TCM
B54
B11
125678
131415169101112
34
17181920
TRANSMISSION
12789563410 11 1219 20 2113 14 15 16 17 18222324
T4
T6
12586910 113412
T6
7
E
514
T5
123 68910 11 12 13 14451516
T5
7
186
1811
88

5AT(diag)-116
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AO:DTC P1799 INTERLOCK
DTC DETECTING CONDITION:
Perform the interlock judgment when the oil pressure switch pattern detects the specified interlock patterns
other than shifting.
TROUBLE SYMPTOM:
Locked to 2nd or 4th gear depending on the vehicle condition at the time of diagnosis.
Step Check Yes No
1CHECK DTC OF TCM.Is any DTC of the followings
detected? P0751, P0753,
P0756, P0758, P0761, P0763,
P0766, P0768, P0771, P0773,
P1798
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After starting the engine again, perform a
drive check with the following conditions.
(1) Keep the speed at 20 km/h with SPORT
shift mode in 1st.
(2) Read the I/C oil pressure switch data of
TCM while driving using Subaru Select
Monitor.
Is OFF displayed? Go to step 3.Perform the diag-
nosis according to
DTC P0756.
3DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After starting the engine again, perform a
drive check based on the inspection mode with
the following conditions. PROCEDURE, Inspection Mode.>
(1) Keep the speed at 20 km/h with manual
mode in 1st.
(2) Read the D/C oil pressure switch data
while driving using Subaru Select Monitor.
Is OFF displayed? Go to step 4.Perform the diag-
nosis according to
DTC P0766.
4DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After starting the engine again, perform a
drive check with the following conditions.
(1) Drive the vehicle at the same speed
with manual mode in 3rd, 4th and 5th.
(2) Read the LC/B oil pressure switch data
while driving using Subaru Select Monitor.
Is OFF displayed? Go to step 5.Perform the diag-
nosis according to
DTC P0771.
5DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After restarting the engine, Perform a drive
check based on the inspection mode. 5AT(diag)-19, PROCEDURE, Inspection
Mode.>
Is DTC displayed? Replace the con-
trol valve body.
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)-119
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AQ:DTC P1840 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH A CIR-
CUIT
DTC DETECTING CONDITION:
Front brake oil pressure switch malfunction
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0751 for diagnostic procedure. PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AR:DTC P1842 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH C CIR-
CUIT
DTC DETECTING CONDITION:
Input clutch oil pressure switch is malfunction.
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0756 for diagnostic procedure. PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AS:DTC P1843 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH D CIR-
CUIT
DTC DETECTING CONDITION:
Direct clutch oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0766 for diagnostic procedure. PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AT:DTC P1844 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH E CIR-
CUIT
DTC DETECTING CONDITION:
High & low reverse clutch oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0761 for diagnostic procedure. PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
8CHECK MANUAL MODE SWITCH.
1) Shift the select lever to shift to the “P”
range.
2) Measure the resistance between harness
connector terminals of manual mode switch.
Te r m i n a l s
(B116) No. 7 — No. 8
Is the resistance more than 1
MΩ?
Check the body
integrated unit.
Replace the select
lever assembly.
Select Lever.>
Step Check Yes No