torque SUBARU FORESTER 2004 Service Repair Manual
[x] Cancel search | Manufacturer: SUBARU, Model Year: 2004, Model line: FORESTER, Model: SUBARU FORESTER 2004Pages: 2870, PDF Size: 38.67 MB
Page 2475 of 2870
4AT(H4SO)-16
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Transmission Control Module (TCM) I/O Signal
(1) Transmission control module
(TCM)(17) “P” range indicator light (35) Torque control signal 2
(18) “P” range switch (36) Torque control signal 1
(2) Cruise control module (19) “R” range indicator light (37) Intake manifold pressure signal
(3) ABS control module (20) “R” range switch (38) AT diagnostics signal
(4) Ignition switch (21) “N” range indicator light (39) Engine control module (ECM)
(5) Brake switch (22) “N” range switch (40) ATF temperature sensor
(6) Brake light (23) “D” range indicator light (41) Torque converter turbine speed
sensor
(7) Battery (24) “D” range switch
(8) Combination meter (Speedome-
ter circuit)(25) “3” range indicator light (42) Rear vehicle speed sensor
(26) “3” range switch (43) Front vehicle speed sensor
(9) AT OIL TEMP warning light (27) “2” range indicator light (44) Shift solenoid 1
(10) FWD indicator light (28) “2” range switch (45) Shift solenoid 2
(11) POWER indicator light (29) “1” range indicator light (46) 2-4 brake timing solenoid
(12) FWD switch (30) “1” range switch (47) Line pressure duty solenoid
(13) POWER switch (31) Data link connector (48) 2-4 brake duty solenoid
(14) Kick-down switch (32) Throttle position sensor (49) Lock-up duty solenoid
(15) Hold indicator light (33) Engine speed signal (50) Low clutch timing solenoid
(16) HOLD switch (34) Torque control cut signal (51) Transfer duty solenoid
Page 2477 of 2870
![SUBARU FORESTER 2004 Service Repair Manual 4AT(H4SO)-18
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Subaru Select Monitor
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «](/img/17/57426/w960_57426-2476.png "SUBARU FORESTER 2004 Service Repair Manual 4AT(H4SO)-18
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Subaru Select Monitor
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «")
4AT(H4SO)-18
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Subaru Select Monitor
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Transmission Control System} and press the
[YES] key.
3) Press the [YES] key after the information of transmission type is displayed.
4) On the «Transmission Diagnosis» display screen, select the {Current Data Display & Save} and press the
[YES] key.
5) On the «Data Display Menu» display screen, select the {Data Display} and press the [YES] key.
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
Automatic transmission fluid 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 (AWD model) 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 %
Intake manifold pressure sensor voltage Mani. Pressure Voltage V
FWD switch signal FWD Switch ON or OFF
Stop light switch signal Stop Light Switch ON or OFF
Anti lock brake system signal ABS Signal ON or OFF
Cruise control system signal Cruise Control 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
Shift control solenoid A Shift Solenoid #1 ON or OFF
Shift control solenoid B Shift Solenoid #2 ON or OFF
Torque control output signal #1 Torque Control Signal 1 ON or OFF
Torque control output signal #2 Torque Control Signal 2 ON or OFF
Torque control cut signal Torque Control Cut Sig. ON or OFF
2-4 brake timing control solenoid valve 2-4 Brake Timing Sol. ON or OFF
Low clutch timing control solenoid valve Low Clutch Timing Sol. ON or OFF
Automatic transmission diagnosis indicator lamp Diagnosis Lamp ON or OFF
Power mode switch signal Power Mode Switch ON or OFF
Hold mode switch signal Hold Mode Switch ON or OFF
Kick down switch signal Kick Down Switch ON or OFF
Automatic transmission fluid temperature lamp ATF Temperature Lamp ON or OFF
Page 2494 of 2870
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.
Trouble Code (DTC).>
27 ATF temperature sensorDetects open or shorted input
signal circuit.
nostic Trouble Code (DTC).>
31 Throttle position sensorDetects open or shorted input
signal circuit.
Diagnostic Trouble Code (DTC).>
33Front vehicle speed
sensorDetects open or shorted input
signal circuit.
Diagnostic Trouble Code (DTC).>
36Torque converter tur-
bine speed sensorDetects open or shorted input
signal circuit.
Procedure with Diagnostic Trouble Code (DTC).>
38 Torque control signalDetects open or shorted input
signal circuit.
nostic Trouble Code (DTC).>
45Intake manifold pres-
sure signalDetects open or shorted input
signal circuit.
dure with Diagnostic Trouble Code (DTC).>
71 Shift solenoid 1Detects open or shorted out-
put signal circuit.
Trouble Code (DTC).>
72 Shift solenoid 2Detects open or shorted out-
put signal circuit.
Trouble Code (DTC).>
73Low clutch timing sole-
noidDetects open or shorted out-
put signal circuit.
Diagnostic Trouble Code (DTC).>
742-4 brake timing sole-
noidDetects open or shorted out-
put signal circuit.
nostic Trouble Code (DTC).>
75Line pressure duty sole-
noidDetects open or shorted out-
put signal circuit.
with Diagnostic Trouble Code (DTC).>
76 2-4 brake duty solenoidDetects open or shorted out-
put signal circuit.
Diagnostic Trouble Code (DTC).>
77 Lock-up duty solenoidDetects open or shorted out-
put signal circuit.
Trouble Code (DTC).>
79 Transfer duty solenoidDetects open or shorted out-
put signal circuit.
Diagnostic Trouble Code (DTC).>
93Rear vehicle speed
sensorDetects open or shorted input
signal circuit.
Diagnostic Trouble Code (DTC).>
Page 2508 of 2870
4AT(H4SO)-49
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
E: DTC 36 TORQUE CONVERTER TURBINE SPEED SENSOR
DTC DETECTING CONDITION:
The input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
AT-00580
14
15
B11
B534
T4
TCMB55
8
9
1
2
RHD
SENSOR
LHD
RHD: LHD MODEL
: RHD MODEL
TORQUE
CONVERTER
TURBINE SPEED
B55
1234
56789
10 1112
13 14 15 16 17 18
192021
2223 24
B11
1
234
56
78
9
1314
15
20 19 1716 10 1112
18
B53
LHD4
5
6SHIELD AND SENSOR GROUND
JOINT
CONNECTOR
LHD :B53
123
4
:RHD
651
234
Page 2509 of 2870
4AT(H4SO)-50
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Measure the resistance between transmis-
sion connector receptacle’s terminals.
Connector & terminal
(T4) No. 14 — No. 15:Is the resistance 450 — 650
Ω?Go to step 2.Replace the tur-
bine speed sensor.
Turbine Speed
Sensor.>
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Disconnect the connector from TCM.
2) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B55) No. 8 — (B11) No. 14:Is the resistance less than 1
Ω?Go to step 3.Repair the open
circuit in harness
between TCM and
transmission con-
nector.
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B55) No. 9 — (B11) No. 15:Is the resistance less than 1
Ω?Go to step 4.Repair the open
circuit in harness
between TCM and
transmission con-
nector, and poor
contact in cou-
pling connector.
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
(B55) No. 9 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 5.Repair the short
circuit in harness
between TCM and
transmission con-
nector.
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
(B55) No. 8 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 6.Repair the short
circuit in harness
between TCM and
transmission con-
nector, and poor
contact in cou-
pling connector.
6 PREPARE OSCILLOSCOPE.Do you have an oscilloscope? Go to step 10.Go to step 7.
7 PREPARE SUBARU SELECT MONITOR.Do you have a Subaru Select
Monitor?Go to step 9.Go to step 8.
8 CHECK INPUT SIGNAL FOR TCM.
1) Connect the connectors to TCM and trans-
mission.
2) Start the engine and move select lever to
“P” or “N” range.
3) Measure the voltage between TCM con-
nector terminals.
Connector & terminal
(B55) No. 8 (+) — No. 9 (
−):Is the voltage more than AC 1
V?Even if the
POWER indicator
lights up, the cir-
cuit has returned
to a normal condi-
tion at this time. A
temporary poor
contact of the con-
nector or harness
may be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.Go to step 11.
Page 2510 of 2870
4AT(H4SO)-51
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
9 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON and turn Sub-
aru Select Monitor switch to ON.
4) Start the engine.
5) Move the select lever to “P” or “N” range.
6) Read the data of turbine speed using Sub-
aru Select Monitor.
Compare the tachometer with Subaru Select
Monitor indications.Is the revolution value same as
the tachometer reading shown
on the combination meter?Even if the
POWER indicator
light was blinking,
the circuit has
returned to a nor-
mal condition at
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
the harness or
connector in TCM
and transmission.Go to step 11.
10 CHECK INPUT SIGNAL FOR TCM USING
OSCILLOSCOPE.
1) Connect the connectors to TCM and trans-
mission.
2) Set the oscilloscope to TCM connector ter-
minals.
Connector & terminal
Positive probe; (B55) No. 8
Earth lead; (B55) No. 9
3) Start the engine and move select lever to
“P” or “N” range.Is the signal voltage more than
AC 1 V?Even if the
POWER indicator
light was blinking,
the circuit has
returned to a nor-
mal condition at
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
the harness or
connector in TCM
and transmission.Go to step 11.
11 CHECK POOR CONTACT.Is there poor contact in torque
converter turbine speed sensor
circuit?Repair the poor
contact.Replace the TCM.
trol Module
(TCM).> Step Check Yes No
Page 2511 of 2870
4AT(H4SO)-52
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
F: DTC 38 TORQUE CONTROL SIGNAL
DTC DETECTING CONDITION:
The signal circuit is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
Step Check Yes No
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
ECM.
3) Measure the resistance of harness
between TCM and ECM connector.
Connector & terminal
(B56) No. 14 — (B136) No. 18:
(B56) No. 5 — (B136) No. 1Is the resistance less than 1
Ω?Go to step 2.Repair the open
circuit in harness
between TCM and
ECM connector.
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B56) No. 14 — Chassis ground:
(B56) No. 5 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 3.Repair the short
circuit in harness
between TCM and
ECM connector.
AT-01827
18
114
5
B56
B136
B136ECM
B56
TCM
1234
56789
10 1112
13 14 15 16 17 18
1920451712
89
20
213
1011 12
13
222314 15
242516
2667
18
19
2728
21
2223 24
2930
Page 2512 of 2870
4AT(H4SO)-53
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
3 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1) Connect the connectors to TCM and ECM.
2) Turn the ignition switch to ON (engine OFF).
3) Measure the voltage between TCM con-
nector terminals.
Connector & terminal
(B56) No. 14 (+) — Chassis ground (
−):
(B56) No. 5 (+) — Chassis ground (
−):Is the voltage more than 4.8 V? Even if the
POWER indicator
light was blinking,
the circuit has
returned to a nor-
mal condition at
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
the harness or
connector in TCM
and ECM.Go to step 4.
4 CHECK POOR CONTACT.Is there poor contact in torque
control signal circuit?Repair the poor
contact.Go to step 5.
5 CHECK GROUND LINE BETWEEN TRANS-
MISSION AND BODY.
Check installing condition of the ground line in
transmission and body.Is there any dirt or rust at the
ground line installing point?Remove dirt and
rust.Go to step 6.
6 CHECK GROUND LINE BETWEEN TRANS-
MISSION AND BODY.
Check installing condition of the ground line in
transmission and body.Is the tightening torque value
13 N⋅m (1.3 kgf-m, 9.4 ft-lb)?Go to step 7.Tighten to the
specified torque.
7 CHECK GROUND LINE INSIDE TRANSMIS-
SION.
1) Drain the ATF and remove oil pan.
2) Check the tightening torque value of ground
line installing bolt.Is the tightening torque value 8
N⋅m (0.8 kgf-m, 5.8 ft-lb)?Go to step 8.Tighten to the
specified torque.
8 CHECK GROUND CIRCUIT OF ECM.
with Diagnostic Trouble Code (DTC).>Is there any trouble? Repair the ground
terminal and/or
ground circuit of
ECM.Go to step 9.
9 RECHECK OUTPUT SIGNAL EMITTED
FROM TCM.
Measure the voltage between TCM connector
and chassis ground.
Connector & terminal
(B56) No. 14 (+) — Chassis ground (
−):
(B56) No. 5 (+) — Chassis ground (
−):Is the voltage more than 4 V? Replace the TCM.
trol Module
(TCM).>Replace the ECM. Step Check Yes No
Page 2547 of 2870
4AT(H4SO)-88
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
B: CHECK BRAKE SWITCH
C: CHECK ABS SWITCH
D: CHECK CRUISE CONTROL SWITCH
Step Check Yes No
1 CHECK BRAKE SWITCH.When the brake pedal is
depressed, does LED light up?Go to step CHECK
ABS SWITCH.
CHECK CRUISE
CONTROL
SWITCH, Diag-
nostic Procedure
without Diagnostic
Trouble Code
(DTC).>Check the brake
switch circuit.
DTC P0703
TORQUE CON-
VERTER/BRAKE
SWITCH “B” CIR-
CUIT, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
Step Check Yes No
1 CHECK ABS SWITCH.Does the LED of ABS switch
light up?Check the ABS
switch circuit.
CONTROL (NON
CONTROLLED),
Diagnostics Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
ABS-AT CON-
TROL (CON-
TROLLED),
Diagnostics Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>Go to step CHECK
CRUISE CON-
TROL SWITCH.
CHECK CRUISE
CONTROL
SWITCH, Diag-
nostic Procedure
without Diagnostic
Trouble Code
(DTC).>
Step Check Yes No
1 CHECK CRUISE CONTROL SWITCH.When the cruise control is set,
does LED light up?Go to step CHECK
KICK-DOWN
SWITCH.
CHECK KICK–
DOWN SWITCH,
Diagnostic Proce-
dure without Diag-
nostic Trouble
Code (DTC).>Check the cruise
control.
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
Page 2570 of 2870
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