2004 SUBARU FORESTER brake sensor

4AT(H4SO)-35
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
12.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Content of diagnosis Index
11 Engine speed signalDetects open or shorted input
signal circuit. SIGNAL, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
27 ATF temperature sensorDetects open or shorted input
signal circuit. TURE SENSOR, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
31 Throttle position sensorDetects open or shorted input
signal circuit. POSITION SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
33Front vehicle speed
sensorDetects open or shorted input
signal circuit. CLE SPEED SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
36Torque converter tur-
bine speed sensorDetects open or shorted input
signal circuit. VERTER TURBINE SPEED SENSOR, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
38 Torque control signalDetects open or shorted input
signal circuit. TROL SIGNAL, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
45Intake manifold pres-
sure signalDetects open or shorted input
signal circuit. FOLD PRESSURE SIGNAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
71 Shift solenoid 1Detects open or shorted out-
put signal circuit. NOID 1, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
72 Shift solenoid 2Detects open or shorted out-
put signal circuit. NOID 2, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
73Low clutch timing sole-
noidDetects open or shorted out-
put signal circuit. TIMING SOLENOID, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
742-4 brake timing sole-
noidDetects open or shorted out-
put signal circuit. ING SOLENOID, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
75Line pressure duty sole-
noidDetects open or shorted out-
put signal circuit. SURE DUTY SOLENOID, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
76 2-4 brake duty solenoidDetects open or shorted out-
put signal circuit. DUTY SOLENOID, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
77 Lock-up duty solenoidDetects open or shorted out-
put signal circuit. SOLENOID, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
79 Transfer duty solenoidDetects open or shorted out-
put signal circuit. DUTY SOLENOID, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
93Rear vehicle speed
sensorDetects open or shorted input
signal circuit. SPEED SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

4AT(H4SO)-111
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Symptom Related Diagnostic
Vehicle does not start in any shift range (engine revving up). Strainer
 Line pressure duty solenoid
 Control valve
 Drive pinion
 Hypoid gear
Axle shaft
 Differential gear
 Oil pump
 Input shaft
 Output shaft
 Planetary gear
Drive plate
 ATF level too low
 Front gasket transmission case
Vehicle does not start in “R” range only (engine revving up). Select cable
 Select lever
 Control valve
 Low & reverse clutch
 Reverse clutch
Vehicle does not start in “R” range only (engine stalls). Low clutch
2-4 brake
 Planetary gear
 Parking brake mechanism
Vehicle does not start in “D”, “3” range only (engine revving up). Low clutch
 One-way clutch
Vehicle does not start in “D”, “3” or “2” range only (engine rev-
ving up). Low clutch
Vehicle does not start in “D”, “3” or “2” range only (engine stalls).  Reverse clutch
Vehicle starts in “R” range only (engine revving up).  Control valve
Acceleration during standing starts is poor (high stall rpm). Control valve
 Low clutch
 Reverse clutch
 ATF level too low
 Front gasket transmission case
 Differential gear oil level too high or too low
Acceleration during standing starts is poor (low stall rpm). Oil pump
 Torque converter one-way clutch
 Engine performance
Acceleration is poor when select lever is in “D”, “3” or “2” range
(normal stall rpm).TCM
 Control valve
High clutch
2-4 brake
 Planetary gear
Acceleration is poor when select lever is in “R” (normal stall rpm). Control valve
High clutch
2-4 brake
 Planetary gear
No shift occurs from 1st to 2nd gear.TCM
 Rear vehicle speed sensor
 Front vehicle speed sensor
 Throttle position sensor
 Shift solenoid 1
 Control valve
2-4 brake
No shift occurs from 2nd to 3rd gear.TCM
 Control valve
High clutch
 Shift solenoid 2 Symptom Problem parts

4AT(H4SO)-112
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Symptom Related Diagnostic
No shift occurs from 3rd to 4th gear.TCM
 Shift solenoid 1
 ATF temperature sensor
 Control valve
2-4 brake
Engine brake is not effected when select lever is in “3” range. Inhibitor switch
TCM
 Throttle position sensor
 Control valve
Engine brake is not effected when select lever is in “3” or “2”
range. Control valve
Engine brake is not effected when select lever is in “1” range. Control valve
 Low & reverse brake
Shift characteristics are erroneous. Inhibitor switch
TCM
 Front vehicle speed sensor
 Rear vehicle speed sensor
 Throttle position sensor
 Control valve
 Ground earth
No lock-up occurs.TCM
 Throttle position sensor
 ATF temperature sensor
 Control valve
 Lock-up facing
 Engine speed signal
Parking brake is not effected.  Select cable
 Select lever
 Parking mechanism Shift lever cannot be moved or is hard to move from “P” range.
ATF spurts out.  ATF level too high
Differential oil spurts out.  Differential gear oil too high
Differential oil level changes excessively. Seal pipe
 Double oil seal
Odor is produced from ATF supply pipe.High clutch
2-4 brake
 Low & reverse clutch
 Reverse clutch
 Lock-up facing
 ATF deterioration
Shock occurs from 1st to 2nd gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
2-4 brake
 ATF deterioration
 Engine performance
 2-4 brake timing solenoid
Slippage occurs from 1st to 2nd gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
2-4 brake
 2-4 brake timing solenoid
High clutch Symptom Problem parts

4AT(H4SO)-113
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Symptom Related Diagnostic
Shock occurs from 2nd to 3rd gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
High clutch
2-4 brake
 ATF deterioration
 Engine performance
 2-4 brake timing solenoid
Slippage occurs from 2nd to 3rd gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
High clutch
2-4 brake
 2-4 brake timing solenoid
Shock occurs from 3rd to 4th gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
 2-4 brake timing solenoid
2-4 brake
 ATF deterioration
 Engine performance
 Low clutch timing solenoid
 Low clutch
Slippage occurs from 3rd to 4th gear.TCM
 Throttle position sensor
 2-4 brake duty solenoid
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
2-4 brake
 2-4 brake timing solenoid
Shock occurs when select lever is moved from “3” to “2” range.TCM
 Throttle position sensor
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
 2-4 brake duty solenoid
2-4 brake
 ATF deterioration
 2-4 brake timing solenoid
Shock occurs when select lever is moved from “D” to “1” range.TCM
 Throttle position sensor
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
 ATF deterioration
 2-4 brake duty solenoid
 2-4 brake timing solenoid
 Low clutch timing solenoid Symptom Problem parts

4AT(H4SO)-114
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Symptom Related Diagnostic
Shock occurs when select lever is moved from “2” to “1” range.TCM
 Throttle position sensor
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
 Low & reverse clutch
 ATF deterioration
 2-4 brake duty solenoid
 2-4 brake timing solenoid
 Low clutch timing solenoid
Shock occurs when accelerator pedal is released at medium
speeds.TCM
 Throttle position sensor
 ATF temperature sensor
 Line pressure duty solenoid
 Control valve
 Lock-up damper
 Engine performance
 2-4 brake duty solenoid
 2-4 brake timing solenoid
 Low clutch timing solenoid
Vibration occurs during straight-forward operation.TCM
 Lock-up duty solenoid
 Lock-up facing
 Lock-up damper
HOLD switch
Vibration occurs during turns (tight corner “braking” phenomenon).TCM
 Front vehicle speed sensor
 Rear vehicle speed sensor
 Throttle position sensor
 ATF temperature sensor
 Transfer clutch
Transfer valve
 Transfer duty solenoid
 ATF deterioration
Harness
HOLD switch
Front wheel slippage occurs during standing starts.TCM
 Front vehicle speed sensor
FWD switch
 Throttle position sensor
 ATF temperature sensor
 Control valve
 Transfer clutch
Transfer valve
 Transfer pipe
 Transfer duty solenoid
Vehicle is not set in FWD mode.TCM
FWD switch
 Transfer clutch
Transfer valve
 Transfer duty solenoid
Select lever is hard to move. Select cable
 Select lever
 Detente spring
 Manual plate
Select lever is too hard to move (unreasonable resistance). Detente spring
 Manual plate Symptom Problem parts

4AT(H4DOTC)-13
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
Accelerator pedal position
sensor (2.5 L model)
B55 19Throttle fully closed. More than 0.2
—
Throttle position sensor (2.0
L model)Throttle fully open. Less than 4.6
Accelerator pedal position
sensor power supply (2.5 L
model)B55 10 Ignition switch ON
(with engine OFF)Approx. 5 —
Throttle position sensor
power supply (2.0 L model)
ATF temperature sensor B55 21ATF temperature 20°C
(68°F)3.5 — 4.3 3.9 k — 4.7 k
ATF temperature 80°C
(176°F)1.5 — 1.9 500 — 600
Rear vehicle speed sensor B55 24Vehicle speed at least
20 km/h (12 MPH)More than 2 (AC range) —
Front vehicle speed sensor B55 6Vehicle stopped. 0
450 — 750
Vehicle speed at least
20 km/h (12 MPH)More than 1 (AC range)
Torque converter turbine
speed sensorB55 7Engine idling after warm-
up. (“D” range)0
450 — 750
Engine idling after warm-
up. (“N” range)More than 1 (AC range)
Vehicle speed output signal B56 1Vehicle speed at least
10 km/h (6 MPH)Less than 1←
→More than 4—
Engine speed signal B55 13Ignition switch ON
(with engine OFF)Less than 1
—
Ignition switch ON
(with engine ON)More than 5
(AC range)
Line pressure linear solenoid B56 20Ignition switch ON
(with engine OFF)
“R” range and throttle fully
closed after warm-up.5 — 7
4.0 — 8.0
Ignition switch ON
(with engine OFF)
“R” range and throttle fully
open after warm-up.3 — 5
Lock-up duty solenoid B56 5When lock up occurs. More than 10.5
2.0 — 4.5
When lock up is released. Less than 1
Transfer duty solenoid B56 4“P” or “N” range Less than 1
2.0 — 4.5
Throttle fully open and with
select lever in 1st gear.More than 10.5
2-4 brake duty solenoid B56 6“P” or “N” range More than 10.5
2.0 — 4.5
2nd or 4th gear Less than 1
High clutch duty solenoid B56 83rd or 4th gear Less than 1
2.0 — 4.5
“P” or “N” range More than 10.5
Low clutch duty solenoid B56 91st or 2nd gear Less than 1
2.0 — 4.5
“P” or “N” range More than 10.5
Low & reverse duty solenoid B56 7“P” or “N” range More than 10.5
2.0 — 4.5
“1” range More than 5
HOLD switch B54 2HOLD switch ON Less than 1
—
HOLD switch OFF More than 10.5 Check with ignition switch ON.
ItemConnector
No.Terminal No. Measuring conditions Voltage (V)Resistance
to chassis
ground (Ω)

4AT(H4DOTC)-16
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Subaru Select Monitor
6) Using the scroll key, move the display screen up or down until desired data is shown.
A list of the support data is shown in the following table.
NOTE:
For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”.
Contents Display Unit of measure
Battery voltage Battery Voltage V
Rear vehicle speed sensor signal Rear Wheel Speed km/h or MPH
Front vehicle speed sensor signal Front Wheel Speed km/h or MPH
Engine speed signal Engine Speed rpm
ATF temperature signal ATF Temp.°C or °F
Throttle position signal Throttle Sensor Voltage V
Gear position Gear Position —
Line pressure control duty ratio Line Pressure Duty Ratio %
Lock up clutch control duty ratio Lock Up Duty Ratio %
Transfer clutch control duty ratio Transfer Duty Ratio %
Power supply for throttle position sensor Throttle Sensor Power V
Torque converter turbine speed signal Turbine Revolution Speed rpm
2-4 brake timing pressure control duty ratio Brake Clutch Duty Ratio %
Low clutch duty ratio L/C Duty %
High clutch duty ratio H/C Duty %
Low & reverse brake duty ratio L&R/B Duty %
Throttle position Throttle position %
Accelerator pedal position Accel. Opening Angle %
Cruise control system Cruise Control Signal ON or OFF
Automatic transmission fluid temperature lamp ATF Temperature Lamp ON or OFF
Stop light switch signal Stop Light Switch ON or OFF
ABS signal ABS Signal ON or OFF
Parking range signal P Range Signal ON or OFF
Neutral range signal N Range Signal ON or OFF
Reverse range signal R Range Signal ON or OFF
Drive range signal D Range Signal ON or OFF
3rd range signal 3rd Range Signal ON or OFF
2nd range signal 2nd Range Signal ON or OFF
1st range signal 1st Range Signal ON or OFF
AT diagnosis indicator lamp Diagnosis Lamp ON or OFF
POWER switch signal POWER Switch ON or OFF
HOLD switch signal HOLD Switch ON or OFF
FWD switch signal FWD SW ON or OFF
Shift lock solenoid signal Shift Lock solenoid ON or OFF

4AT(H4DOTC)-30
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
12.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Diagnosis content Reference
P0705Transmission Range Sen-
sor Circuit (PRNDL Input)Inhibitor switch malfunction, open or
short circuit TRANSMISSION RANGE SENSOR,
Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0712Transmission Fluid Temper-
ature Sensor Circuit Low
InputATF temperature sensor malfunction,
open input signal circuit TRANSMISSION FLUID TEMPERA-
TURE SENSOR CIRCUIT LOW INPUT,
Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0713Transmission Fluid Temper-
ature Sensor Circuit High
InputATF temperature sensor malfunction,
short input signal circuit TRANSMISSION FLUID TEMPERA-
TURE SENSOR CIRCUIT HIGH INPUT,
Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0715Input/Turbine Speed Sensor
CircuitTorque converter turbine speed sen-
sor malfunction, open or short input
signal circuit INPUT/TURBINE SPEED SENSOR
CIRCUIT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0719Torque Converter/Brake
Switch “B” Circuit Low Brake switch malfunction, open input
signal circuit TORQUE CONVERTER/BRAKE
SWITCH “B” CIRCUIT LOW, Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>
P0720Output Speed Sensor Cir-
cuitFront vehicle speed sensor malfunc-
tion, open or short input signal circuit OUTPUT SPEED SENSOR CIRCUIT,
Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0724Torque Converter/Brake
Switch “B” Circuit HighBrake switch malfunction, short input
signal circuit TORQUE CONVERTER/BRAKE
SWITCH “B” CIRCUIT HIGH, Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>
P0725 Engine Speed Input CircuitOpen or short engine speed output
signal circuit ENGINE SPEED INPUT CIRCUIT, Diag-
nostic Procedure with Diagnostic Trouble
Code (DTC).>
P0731 Gear 1 Incorrect Ratio Vehicle speed sensor, torque con-
verter turbine speed sensor, or con-
trol valve malfunction GEAR 1 INCORRECT RATIO, Diagnos-
tic Procedure with Diagnostic Trouble
Code (DTC).>
P0732 Gear 2 Incorrect Ratio Vehicle speed sensor, torque con-
verter turbine speed sensor, or con-
trol valve malfunction GEAR 2 INCORRECT RATIO, Diagnos-
tic Procedure with Diagnostic Trouble
Code (DTC).>
P0733 Gear 3 Incorrect Ratio Vehicle speed sensor, torque con-
verter turbine speed sensor, or con-
trol valve malfunction GEAR 3 INCORRECT RATIO, Diagnos-
tic Procedure with Diagnostic Trouble
Code (DTC).>
P0734 Gear 4 Incorrect Ratio Vehicle speed sensor, torque con-
verter turbine speed sensor, or con-
trol valve malfunction GEAR 4 INCORRECT RATIO, Diagnos-
tic Procedure with Diagnostic Trouble
Code (DTC).>