5AT(diag)-13
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
H&LR/C oil pressure
switch inputB55 8
While driving at 2nd of
manual mode
Pow er s up p ly
voltage—
While driving at 3rd —
5th of manual modeApprox. 0 V
Fr o nt veh ic l e sp e ed
sensor inputB55 7
While driving at 2nd and
20 km/h (12 MPH) of
manual mode
Approx. 530 —
610 rpm
—
Use the Subaru
Select Monitor.
While driving at 4th and
80 km/h (50 MPH) of
manual mode
Approx. 2160 —
2410 rpm
Use the Subaru
Select Monitor.
Inhibitor switch 1 input B55 4
Ignition switch ON, “P”
range4.0 — 5.0 V
—
Ignition switch ON, “N”
rangeLess than 1.5 V
Inhibitor switch 2 input B55 3
Ignition switch ON, “P”
range4.0 — 5.0 V
—
Ignition switch ON, “D”
rangeLess than 1.5 V
Accessory power sup-
plyB55 2Accessory switch ONPow er s up p ly
voltage—
Accessory switch OFF Approx. 0 V
Ignition power supply B55 1Ignition switch ONPow er s up p ly
voltage—
Ignition switch OFF Approx. 0 V
Rear vehicle speed
sensor inputB55 18
While driving at 2nd and
20 km/h (12 MPH) of
manual mode
Approx. 530 —
610 rpm
—
Use the Subaru
Select Monitor.
While driving at 4th and
80 km/h (50 MPH) of
manual mode
Approx. 2160 —
2410 rpm
Use the Subaru
Select Monitor.
Fr / B oi l p r e ssu r e
switch inputB55 17
Ignition switch ON,
engine ON, while driv-
ing at other than 4th
Approx. 0 V
—
Ignition switch ON,
engine ON, while driv-
ing at 4th
Pow er s up p ly
voltage
Tu r b i n e s p e e d s e n s o r
1 inputB55 16
2nd of manual mode,
turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
Approx. 0 rpm
—
Use the Subaru
Select Monitor.
4th of manual mode, tur-
bine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
Approx. 1,900
— 2,100 rpm
Use the Subaru
Select Monitor.
Range lock solenoid
outputB55 15
Ignition switch ON, while
stopping at “D” range
Approx. Power
Supply Voltage
–1.2 V7 — 21 Ω
Ignition switch ON, vehi-
cle speed at least 20 km/
h (12 MPH)
Approx. 0 V
Inhibitor switch 3 input B55 14
Ignition switch ON, “R”
range4.0 — 5.0 V
—
Ignition switch ON, “D”
rangeLess than 1.5 V
ItemConnector
No.
Te r m i n a l
No.Measuring condition Measured value
Resistance
between termi-
nal and chassis
ground
Remarks
5AT(diag)-14
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Inhibitor switch 4 input B55 13
Ignition switch ON, “P”
range4.0 — 5.0 V
—
Ignition switch ON, “D”
rangeLess than 1.5 V
Control valve commu-
nication lineB55 12 — — —
Back-up light relay
outputB55 11
Ignition switch ON, “R”
range1.5 V90 — 110 Ω
(ATF tempera-
ture 25°C
(77°F))
Ignition switch ON, other
than “R” range
Pow er s up p ly
voltage
Ignition power supply B55 10Ignition switch ONPow er s up p ly
voltage—
Ignition switch OFF Approx. 0 V
AW D s o le n oi d o u tp u t B 5 5 2 3
Engine ON, “P” range or
“N” range, accelerator
OFF
Approx. 0 V3 — 9 Ω(ATF
temperature
20°C (68°F))
Driving fre-
quency 750 —
850 HzEngine ON, “D” range,
accelerator OFF, brake
ON
Approx. 2.0 —
3.0 V
Tu r b i n e s p e e d s e n s o r
2 inputB55 22
2nd of manual mode,
turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
Approx. 1,300
— 1,500 rpm
Use the Subaru
Select Monitor.
4th of manual mode, tur-
bine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
Approx. 1,900
— 2,100 rpm—Use the Subaru
Select Monitor.
Control GND B55 21 Always Approx. 0 V —
Inhibitor switch 3
open circuit monitor
input
B55 20
Ignition switch ON, “D”
range4.0 — 5.0 V
—
Ignition switch ON, “R”
rangeLess than 1.5 V
PN signal output B55 19
Ignition switch ON,
Other than “P” range or
“N” range
Pow er s up p ly
voltage—
ECM should be
connected cor-
rectly.
Ignition switch ON, “P”
range or “N” range0 — 1.0 V —
ItemConnector
No.
Te r m i n a l
No.Measuring condition Measured value
Resistance
between termi-
nal and chassis
ground
Remarks
5AT(diag)-16
Subaru Select Monitor
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
•A list of the support data is shown in the following table.
NOTE:
For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MAN-
UAL”.
Item Display Unit of measure
Engine speed signal Engine speed rpm
Battery voltage Battery Voltage V
Accelerator pedal position sensor Acceleration opening angle %
Fr o nt veh ic l e sp e ed se n so r s ig n al Fr o n t W h ee l S p e ed km/ h
Gear position Gear Position —
Tu r b i n e s p e e d s e n s o r s i g n a l Tu r b i n e R e v o l u t i o n S p e e d r p m
Rear vehicle speed sensor signal Rear Wheel Speed km/h
ATF temperature sensor 1 signal ATF Temp. °C
ATF temperature sensor 2 signal ATF Temp. 2 °C
Tu r b i n e s p e e d s e n s o r 1 s i g n a l Tu r b i n e R e v o l u t i o n S p e e d 1 r p m
Tu r b i n e s p e e d s e n s o r 2 s i g n a l Tu r b i n e R e v o l u t i o n S p e e d 2 r p m
High & low reverse clutch solenoid indicator current H&LR/C Solenoid Current A
Direct clutch solenoid indicator current D/C Solenoid Current A
Fr o nt b rake so l en oi d in di c at o r c u rr e n t F / B S o l en o id Cur r e nt A
Input clutch solenoid indicator current I/C Solenoid Current A
Line pressure solenoid indicator current P/L Solenoid Current A
Lock-up solenoid indicator current L/U Solenoid Current A
Tr a n s f e r s o l e n o i d i n d i c a t o r c u r r e n t A W D S o l e n o i d C u r r e n t A
High & low reverse clutch solenoid target oil pressure H&LR/C Solenoid Target Pressure kPa
Direct clutch solenoid target oil pressure D/C Solenoid Target Pressure kPa
Fr o nt b rake so l en oi d ta r g et o il pr e ss ur e F / B S o l en o id Ta r g et P r es su r e kPa
Input clutch solenoid target oil pressure I/C Solenoid Target Pressure kPa
Line pressure solenoid target oil pressure P/L Solenoid Target Pressure kPa
Lock-up solenoid target oil pressure L/U Solenoid Target Pressure kPa
Tr a n s f e r s o l e n o i d t a r g e t o i l p r e s s u r e A W D S o l e n o i d Ta r g e t P r e s s u r e k P a
Ignition switch Ignition SW ON Input or OFF Input
Tip signal Tip Mode SW ON or OFF
Cruise control ON signal Cruise Control Signal ON or OFF
Tip down shift signal Down SW ON or OFF
Stop light switch signal Stop Light SW ON or OFF
Tip up shift signal Up SW ON or OFF
Drive range signal D Range ON or OFF
Reverse range signal R Range ON or OFF
Diagnosis light output signal Diagnosis Lamp ON or OFF
AT F t e m p e r a t u r e l a m p s i g n a l AT F Te m p e r a t u r e L a m p O N o r O F F
Shift lock solenoid signal Shift Lock Solenoid ON or OFF
Par king range signal P range ON or OFF
P/N range output signal P/N Signal ON or OFF
Neutral range signal N range ON or OFF
Inhibitor switch 1 input signal Inhibitor SW1 High or Low
Inhibitor switch 2 input signal Inhibitor SW2 High or Low
Inhibitor switch 3 input signal Inhibitor SW3 High or Low
Inhibitor switch 4 input signal Inhibitor SW4 High or Low
Inhibitor switch 3 monitor input signal Inhibitor SW3 Monitor High or Low
Backup light relay output signal Back-up light relay ON or OFF
High & low reverse clutch oil pressure switch input signal H&LR/C Oil Pressure SW ON or OFF
Direct clutch oil pressure switch input signal D/C Oil Pressure SW ON or OFF
Fr o nt b rake oi l pr e ss ur e swi tc h i n pu t si gn a l Fr / B Oi l P r e ss ur e S W ON or OF F
Input clutch oil pressure switch input signal I/C Oil Pressure SW ON or OFF
Low coast brake oil pressure switch input signal LC/B Oil Pressure SW ON or OFF
Low coast brake solenoid input signal LC B Solenoid ON or OFF
5AT(diag)-28
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
13.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Content of diagnosis Reference target
P0705
Tr a n s m i s s i o n R a n g e
Sensor Circuit (PRNDL
Input)
Inhibitor switch malfunction, open
or short circuit
INPUT), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0712
Tr a n s m i s s i o n F l u i d Te m -
perature Sensor Circuit
Low Input
AT F t e m p e r a t u r e s e n s o r 1 m a l -
function, or open input signal cir-
cuit
CUIT LOW INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0713
Tr a n s m i s s i o n F l u i d Te m -
perature Sensor Circuit
High Input
AT F t e m p e r a t u r e s e n s o r 1 m a l -
function, short input signal circuit
CUIT HIGH INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0715Input/Turbine Speed
Sensor Circuit
Tu r b i n e s p e e d s e n s o r 1 m a l f u n c -
tion, short input signal circuit
Procedure with Diagnostic Trouble Code
(DTC).>
P0719To r q u e C o n v e r t e r / B r a k e
Switch “B” Circuit Low
Brake switch malfunction, open
input signal circuit, body inte-
grated unit malfunction, CAN
communication malfunction
LOW, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0720Output Speed Sensor
Circuit
Front wheel speed sensor is
faulty or input signal circuit,
ground, power supply is open or
shorted.
dure with Diagnostic Trouble Code (DTC).>
P0724To r q u e C o n v e r t e r / B r a k e
Switch “B” Circuit High
Brake switch malfunction, short
circuit of input signal, body inte-
grated unit, CAN communication
malfunction
HIGH, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0725Engine Speed Input Cir-
cuit
Open or short engine speed out-
put signal circuit, ECM malfunc-
tion, CAN communication
malfunction
with Diagnostic Trouble Code (DTC).>
P0731 Gear 1 Incorrect Ratio
Ve h i c l e s e n s o r, t u r b i n e s p e e d
sensor, control valve malfunction
or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0732 Gear 2 Incorrect Ratio
Ve h i c l e s e n s o r, t u r b i n e s p e e d
sensor, control valve malfunction
or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0733 Gear 3 Incorrect RatioVe h i c l e s e n s o r, t u r b i n e s p e e d
sensor or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0734 Gear 4 Incorrect RatioVe h i c l e s e n s o r, t u r b i n e s p e e d
sensor or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0735 Gear 5 Incorrect RatioVe h i c l e s e n s o r, t u r b i n e s p e e d
sensor or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0736 Reverse Incorrect RatioVe h i c l e s e n s o r, t u r b i n e s p e e d
sensor or shift clutch malfunction
Diagnostic Trouble Code (DTC).>
P0741
To r q u e C o n v e r t e r C l u t c h
Circuit Performance or
Stuck Off
Lock-up clutch is faulty or valve is
stuck.
MANCE OR STUCK OFF, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
5AT(diag)-30
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
P0957Backup Light Relay Cir-
cuit Low
Back-up relay output circuit is
open, shorted or relay OFF mal-
function
dure with Diagnostic Trouble Code (DTC).>
P0958Backup Light Relay Out-
put Circuit High
Back-up relay output circuit is
open, shorted or relay ON mal-
function
cedure with Diagnostic Trouble Code (DTC).>
P1601TCM Data Communica-
tion Failure
Communication Failure between
TCM and Memory Box
dure with Diagnostic Trouble Code (DTC).>
P1706
AT Ve h i c l e S p e e d S e n -
sor Circuit Malfunction
(Rear Wheel)
Rear wheel speed sensor is faulty
or input circuit, ground, power
supply is open or shorted.
TION (REAR WHEEL), Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
P1707AT A W D S o l e n o i d V a l v e
Circuit Malfunction
AWD solenoid circuit malfunction
or AWD solenoid body malfunc-
tion
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1710
To r q u e C o n v e r t e r Tu r -
bine 2 Speed Signal Cir-
cuit 2 Malfunction
To r q u e c o n v e r t e r s e n s o r 2 m a l -
function, input circuit, ground,
power open, short circuit
CIRCUIT 2 MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P1716AT F Te m p . S e n s o r 2 C i r -
cuit Low
AT F t e m p e r a t u r e s e n s o r 2 m a l -
function, or open input signal cir-
cuit
dure with Diagnostic Trouble Code (DTC).>
P1717AT F Te m p . S e n s o r 2 C i r -
cuit High
AT F t e m p e r a t u r e s e n s o r 2 m a l -
function, short input signal circuit
dure with Diagnostic Trouble Code (DTC).>
P1718AT C A N C o m m u n i c a t i o n
Circuit
CAN communication line bus off
is open, EUM short circuit, ABS/
VDCCM, integrated CU malfunc-
tion
dure with Diagnostic Trouble Code (DTC).>
P1798 Gear 1 Engine Brake
Malfunction of clutch oil pressure
related to 1st engine brake, sole-
noid current malfunction
Diagnostic Trouble Code (DTC).>
P1799 Interlock
Malfunction of clutch oil pressure
which emit interlock, solenoid
current malfunction
Tr o u b l e C o d e ( D T C ) . >
P1817SPORT Mode Switch
Circuit (Manual Switch)
Manual mode switch is open or
shorted, or switch malfunction
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1840
Tr a n s m i s s i o n F l u i d P r e s -
sure Sensor/Switch A
Circuit
Fr/B oil pressure switch is open or
shorted, or switch malfunction
CIRCUIT, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P1842
Tr a n s m i s s i o n F l u i d P r e s -
sure Sensor/Switch C
Circuit
I/C oil pressure switch is open or
shorted, or switch malfunction.
CIRCUIT, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P1843
Tr a n s m i s s i o n F l u i d P r e s -
sure Sensor/Switch D
Circuit
D/C oil pressure switch is open or
shorted, or switch malfunction.
CIRCUIT, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P1844
Tr a n s m i s s i o n F l u i d P r e s -
sure Sensor/Switch E
Circuit
H&LR/C oil pressure switch is
open or shorted, or switch mal-
function.
CIRCUIT, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
DTC Item Content of diagnosis Reference target
5AT(diag)-41
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
D: DTC P0715 INPUT/TURBINE SPEED SENSOR CIRCUIT
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
•Excessive shift shock
•Does not shift to 5th
WIRING DIAGRAM:
AT-02074
12341011 121920 21135614 1578916 17 1822 23 24
AT 1
123
12345678
B54
B55
12789563410 11 1219 20 2113 14 15 16 17 18222324
B11
B12
125678
131415169101112
34
17181920
B54A:B55B:
A16
7B11
T4
B12
T3
TCM
TURBINE SPEED SENSOR 1
B16
7
E
B:
A:
321AT1
5AT(diag)-42
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
(B55) No. 16 — (B12) No. 7:
(B54) No. 16 — (B11) No. 7:
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 TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 16 — Chassis ground:
(B54) No. 16 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 3.Repair the short
circuit of harness
between TCM and
chassis ground.
3CHECK TCM POWER SUPPLY OUTPUT.
1) Connect the TCM connector. (Transmission
connector is disconnected)
2) Turn the ignition switch to ON. (Engine
OFF)
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Go to step 4.Go to step 5.
4CHECK TURBINE SPEED SENSOR INPUT
CIRCUIT OF TCM.
Measure the voltage between TCM connector
terminals.
Connector & terminal
(B55) No. 16 (+) — (B54) No. 19 (–):
Is the voltage 4 — 6 V? Go to step 6.Go to step 5.
5CHECK TCM I/O SIGNAL.
Check I/O signal of power supply, ground and
PVIGN power supply relay.
I/O Signal.>
Is TCM I/O signal OK? Replace the TCM.
trol Module
(TCM).>
Repair the open or
short circuit for
power supply and
ground. Perform
the diagnosis
according to DTC
for PVIGN power
supply relay.
6CHECK HARNESS ASSEMBLY (TURBINE
SPEED SENSOR GROUND).
Check the installing condition of ground con-
necting harness of harness assembly (used for
both of turbine speed sensor 1, rear vehicle
speed sensor).
Is the ground connecting har-
ness installed securely to the
transmission body? Is there
any serious damage in the har-
ness and terminal?
Go to step 7.When poor instal-
lation of ground
occurs, install it
securely. Replace
the transmission
assembly if the
harness or termi-
nal is damaged.
mission Assem-
bly.>
5AT(diag)-43
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7CHECK HARNESS ASSEMBLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Disconnect the connector from turbine
speed sensor 1.
4) Measure the resistance between transmis-
sion connector and turbine speed sensor 1
connector.
Connector & terminal
(T4) No. 7 — (AT1) No. 3:
(T3) No. 7 — (AT1) No. 2:
(AT1) No. 1 — Chassis ground:
Is the resistance less than 1
Ω?
Go to step 8.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
8CHECK HARNESS ASSEMBLY.
Measure the resistance between transmission
connector and chassis ground.
Connector & terminal
(T4) No. 7 — Chassis ground:
(T3) No. 7 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 9.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
9CHECK 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 set the vehicle in 4th
speed driving condition of manual mode.
NOTE:Turbine speed sensor 1 signal can be mea-
sured only on 4th speed.
4) Read the current data of turbine speed sen-
sor 1 using the Subaru Select Monitor.
AT I O N , S u b a r u S e l e c t M o n i t o r . >
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.
Does the value of the turbine
speed sensor 1 change
depending on the acceleration,
deceleration and shifting range
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 the
poor contact of
harness between
AT F t e m p e r a t u r e
sensor and trans-
mission connector.
Replace the tur-
bine speed sensor
1.
Sensor 1.>
Step Check Yes No