shift SUBARU LEGACY 1996 Service Repair Manual

G2M0931
(4) Push the TCS OFF switch to ON. (with TCS mod-
els)
(5) Start the engine.
(6) Shift on the gear position, and keep the vehicle
speed at constant.
(7) Measure signal voltage.
Specified voltage: 2 V, or more
NOTE:
If vehicle speed increases, the width of amplitude (W)
decreases.
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.

52
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0383
I: MODE F09
—THROTTLE POSITION SENSOR (THV)—
CONDITION:

Ignition switch ON (with engine OFF)

Measure voltage while operating throttle valve from a
fully closed position to a fully open position.
SPECIFIED DATA:

Fully closed position: 0.5±0.2 V

Fully open position: 4.6±0.3 V

From fully closed to fully open position:
Voltage must smoothly decrease.

Open harness: 5.0±0.3 V

Shorted harness: 0.00 V
Probable cause (if outside“specified data”)
1. Throttle position sensor
Check performance characteristics of throttle
position sensor.
OK
Check TCM and replace if necessary.
G3M0730
J: MODE F10—GEAR POSITION (GEAR)—
CONDITION:
Check while driving vehicle (after warm-up).
SPECIFIED DATA:
Gear position (Refer to shift performance characteristics
chart.)
Probable cause (item outside“specified data”)
1. Shift solenoid 1
Check performance characteristics of shift solenoid
1.
OK
2. Shift solenoid 2
Check performance characteristics of shift solenoid
2.
OK
3. Shift solenoid 3
Check performance characteristics of shift solenoid
3.
OK
Check TCM and replace as necessary.




59
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

9. General Diagnostic Table
Problem parts
Inhibitor switch
Control module
Vehicle speed sensor 1
Vehicle speed sensor 2
Select cable
Select lever
FWD switch
Starter motor and harness
Throttle position sensor
Diagnosis switch
Accumulator (“N”—“D”)
Accumulator (2A)
Accumulator (4A)
Accumulator (3R)
ATF temperature sensor
Strainer
Duty solenoid A
Duty solenoid B
Shift solenoid 1
Shift solenoid 2
Shift solenoid 3
Control valve
Detent spring
Manual plate
Transfer clutch
Transfer valve
Transfer pipe
Duty solenoid C
Forward clutch
Symptom1234567891011121314151617181920212223242526272829
Starter does not rotate when select lever is
in“P”or“N.”; starter rotates when select
lever is“R”,“D”,“3”or“2.”XXXX
Abnormal noise when select lever is in“P”or
“N.”XX
Hissing noise occurs during standing starts. X
Noise occurs while driving in“D
1”range.
Noise occurs while driving in“D
2”range.
Noise occurs while driving in“D
3”range.
Noise occurs while driving in“D
4”range.
Engine stalls while shifting from one range to
another.X
Vehicle moves when select lever is in“N.”X
Shock occurs when select lever is moved
from“N”to“D.”XX X
Excessive time lag occurs when select lever
is moved from“N”to“D.”XX
Shock occurs when select lever is moved
from“N”to“R.”XXX
Excessive time lag occurs when select lever
is moved from“N”to“R.”X
Vehicle does not start in any shift range
(engine revving up).XX
Vehicle does not start in any shift range
(engine stall).
Vehicle does not start in“R”range only
(engine revving up).XX X
Vehicle does not start in“R”range only
(engine stall).X
Vehicle does not start in“D”or“3”range
(engine revving up).X
Vehicle does not start in“D”,“3”or“2”range
(engine revving up).X
Vehicle does not start in“D”,“3”or“2”range
(engine stall).
Vehicle starts in“R”range only (engine rev-
ving up).X
Acceleration during standing starts is poor
(high stall rpm).XX
Acceleration during standing starts is poor
(low stall rpm).
Acceleration is poor when select lever is in
“D”,“3”or“2”range (normal stall rpm).XX
Acceleration is poor when select lever is in
“R”(normal stall rpm).X
No shift occurs from 1st to 2nd gear. X X X X X X X
No shift occurs from 2nd to 3rd gear. XX
No shift occurs from 3rd to 4th gear. X X X X X
No“kick-down”shifts occur. X X
Engine brake is not effected when select
lever is in“3”range.XX X X
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67
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
9. General Diagnostic Table

Overrunning clutch
Drive pinion
Crown gear
Axle shaft
Differential gear
Final gear
Seal pipe
Oil pump
High clutch
Band brake
Low & reverse clutch
Reverse clutch
One-way clutch (1-2)
One-way clutch (3-4)
Double oil seal
Input shaft
Output shaft
Planetary gear
Reduction gear
Drive plate
Torque converter one-way clutch
Lock-up facing
Lock-up damper
ATF deterioration
ATF level too high or too low
Differential gear oil level too high or too low
Engine performance
Engine speed signal
Parking brake mechanism
Problem parts
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Symptom
Starter does not rotate when select lever is
in“P”or“N.”; starter rotates when select
lever is“R”,“D”,“3”or“2.”
XXXAbnormal noise when select lever is in“P”or
“N.”
X Hissing noise occurs during standing starts.
X X X X Noise occurs while driving in“D
1”range.
X X X X Noise occurs while driving in“D
2”range.
X X X Noise occurs while driving in“D
3”range.
X X X X Noise occurs while driving in“D
4”range.
XXEngine stalls while shifting from one range to
another.
Vehicle moves when select lever is in“N.”
XShock occurs when select lever is moved
from“N”to“D.”
Excessive time lag occurs when select lever
is moved from“N”to“D.”
XShock occurs when select lever is moved
from“N”to“R.”
XXExcessive time lag occurs when select lever
is moved from“N”to“R.”
XXXX X XXX X XVehicle does not start in any shift range
(engine revving up).
XVehicle does not start in any shift range
(engine stall).
XXVehicle does not start in“R”range only
(engine revving up).
XXVehicle does not start in“R”range only
(engine stall).
XVehicle does not start in“D”or“3”range
(engine revving up).
Vehicle does not start in“D”,“3”or“2”range
(engine revving up).
XVehicle does not start in“D”,“3”or“2”range
(engine stall).
Vehicle starts in“R”range only (engine rev-
ving up).
XXAcceleration during standing starts is poor
(high stall rpm).
XXXAcceleration during standing starts is poor
(low stall rpm).
XX XAcceleration is poor when select lever is in
“D”,“3”or“2”range (normal stall rpm).
XXXXAcceleration is poor when select lever is in
“R”(normal stall rpm).
XNo shift occurs from 1st to 2nd gear.
X X No shift occurs from 2nd to 3rd gear.
XNo shift occurs from 3rd to 4th gear.
No“kick-down”shifts occur.
Engine brake is not effected when select
lever is in“3”range.
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
68
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
9. General Diagnostic Table

Problem parts
Inhibitor switch
Control module
Vehicle speed sensor 1
Vehicle speed sensor 2
Select cable
Select lever
FWD switch
Starter motor and harness
Throttle position sensor
Diagnosis switch
Accumulator (“N”—“D”)
Accumulator (2A)
Accumulator (4A)
Accumulator (3R)
ATF temperature sensor
Strainer
Duty solenoid A
Duty solenoid B
Shift solenoid 1
Shift solenoid 2
Shift solenoid 3
Control valve
Detent spring
Manual plate
Transfer clutch
Transfer valve
Transfer pipe
Duty solenoid C
Forward clutch
Symptom1234567891011121314151617181920212223242526272829
Engine brake is not effected when select
lever is in“3”or“2”range.
Engine brake is not effected when select
lever is in“1”range.X
Shift characteristics are erroneous.XXXX X X
No lock-up occurs. X X X X
Vehicle cannot be set in“D”range power
mode.XX
“D”range power mode cannot be released. X X X
Parking brake is not effected. X X
Shift lever cannot be moved or is hard to
move from“P”range.XX
Select lever is hard to move. X X X X
Select lever is too light to move (unreason-
able resistance).XX
ATF spurts out.
Differential oil spurts out.
Differential oil level changes excessively.
Odor is produced from oil supply pipe.XX
Shock occurs when select lever is moved
from“1”to“2”range.X XXXX X
Slippage occurs when select lever is moved
from“1”to“2”range.X XXXX X
Shock occurs when select lever is moved
from“2”to“3”range.XXXXXX
Slippage occurs when select lever is moved
from“2”to“3”range.XXXXXX
Shock occurs when select lever is moved
from“3”to“4”range.X X XXX X
Slippage occurs when select lever is moved
from“3”to“4”range.X X XXX X
Shock occurs when select lever is moved
from“3”to“2”range.XXXXX
Shock occurs when select lever is moved
from“D”to“1”range.XXXXX
Shock occurs when select lever is moved
from“2”to“1”range.XXXXX
Shock occurs when accelerator pedal is
released at medium speeds.XXXXX
Vibration occurs during straight-forward
operation.XX
Select lever slips out of position during
acceleration or while driving on rough terrain.XX XX
Vibration occurs during turns (tight corner
“braking”phenomenon).XXX X X XX X
Front wheel slippage occurs during standing
starts.X X X X X X XXXX
Vehicle is not set in FWD mode. X XXX X
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69
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
9. General Diagnostic Table

Overrunning clutch
Drive pinion
Crown gear
Axle shaft
Differential gear
Final gear
Seal pipe
Oil pump
High clutch
Band brake
Low & reverse clutch
Reverse clutch
One-way clutch (1-2)
One-way clutch (3-4)
Double oil seal
Input shaft
Output shaft
Planetary gear
Reduction gear
Drive plate
Torque converter one-way clutch
Lock-up facing
Lock-up damper
ATF deterioration
ATF level too high or too low
Differential gear oil level too high or too low
Engine performance
Engine speed signal
Parking brake mechanism
Problem parts
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Symptom
XEngine brake is not effected when select
lever is in“3”or“2”range.
XEngine brake is not effected when select
lever is in“1”range.
Shift characteristics are erroneous.
X X No lock-up occurs.
Vehicle cannot be set in“D”range power
mode.
“D”range power mode cannot be released.
X Parking brake is not effected.
XShift lever cannot be moved or is hard to
move from“P”range.
Select lever is hard to move.
Select lever is too light to move (unreason-
able resistance).
X ATF spurts out.
X Differential oil spurts out.
X X Differential oil level changes excessively.
X XXXX X XOdor is produced from oil supply pipe.
XXXShock occurs when select lever is moved
from“1”to“2”range.
XSlippage occurs when select lever is moved
from“1”to“2”range.
XX X XShock occurs when select lever is moved
from“2”to“3”range.
XXSlippage occurs when select lever is moved
from“2”to“3”range.
XX XXShock occurs when select lever is moved
from“3”to“4”range.
XSlippage occurs when select lever is moved
from“3”to“4”range.
XX XShock occurs when select lever is moved
from“3”to“2”range.
XShock occurs when select lever is moved
from“D”to“1”range.
XXShock occurs when select lever is moved
from“2”to“1”range.
XXShock occurs when accelerator pedal is
released at medium speeds.
XXVibration occurs during straight-forward
operation.
Select lever slips out of position during
acceleration or while driving on rough terrain.
XVibration occurs during turns (tight corner
“braking”phenomenon).
Front wheel slippage occurs during standing
starts.
Vehicle is not set in FWD mode.
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
70
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
9. General Diagnostic Table

G2M0931
B6M0287
3) Start the engine.
4) Shift on the gear position, and keep the vehicle speed
at constant.
5) Measure signal voltage.
Specified voltage (V): 2 V, or more
NOTE:

If the vehicle speed increases, the width of amplitude
(W) decreases.

If oscilloscope is not available, check input signal
(vehicle speed signal) by using a select monitor. (Refer to
the procedure as described below.)

Using the select monitor:
(1) Set the vehicle on free roller, or lift-up the vehicle and
support with safety stands.
(2) Turn ignition switch to OFF and set select monitor.
(3) Turn ignition switch to ON.
(4) Turn cruise control main switch to ON.
(5) Set select monitor in“F01”or“F02”mode.
(6) Drive the vehicle at speed greater than 40 km/h (25
MPH).
(7) Check that vehicle speed indication on select moni-
tor and speedometer are equal.
NOTE:

When there is a disconnection or short circuit in the har-
ness between the meter and the cruise control module, the
indicated value will be 0 to 1.0 km/h (0 to 0.6 MPH).

In“F01”mode, vehicle speed is indicated in mile per
hour (MPH).
In“F02”mode, vehicle speed is indicated in kilometer per
hour (km/h).
B3M0250
3. PERFORM A CIRCUIT TEST BETWEEN
COMBINATION METER AND CRUISE CONTROL
MODULE.
1) Turn ignition switch to OFF.
2) Remove combination meter.
B6M0194B
3) Disconnect connector from cruise control module.
4) Measure resistance of harness connector between
combination meter and cruise control module.
Connector & terminal / Specified resistance:
(i10) No. 10—(B94) No. 19 / 10Ω, max.
24
6-2BODY ELECTRICAL SYSTEM
8. Diagnostics Chart with Trouble Code

2. Basic Diagnostics Procedures
The most important purpose of diagnostics is to determine
which part is malfunctioning quickly, to save time and labor.
A: IDENTIFICATION OF TROUBLE SYMPTOM
Determine what the problem is based on the symptom.
B: PROBABLE CAUSE OF TROUBLE
Look at the wiring diagram and check the system’s circuit.
Then check the switch, relay, fuse, ground, etc.
C: LOCATION AND REPAIR OF TROUBLE
1) Using the diagnostics narrow down the causes.
2) If necessary, use a voltmeter, ohmmeter, etc.
3) Before replacing certain component parts (switch, relay,
etc.), check the power supply, ground, for open wiring
harness, poor connectors, etc. If no problems are
encountered, check the component parts.
D: CONFIRMATION OF SYSTEM OPERATION
After repairing, ensure that the system operates properly.
G6M0206
E: INSPECTION
1. VOLTAGE MEASUREMENT
1) Using a voltmeter, connect the negative lead to a good
ground point or negative battery terminal and the positive
lead to the connector or component terminal.
2) Contact the positive probe of the voltmeter on connec-
tor (A).
The voltmeter will indicate a voltage.
3) Shift the positive probe to connector (B). The voltmeter
will indicate no voltage.
With test set-up held as it is, turn switch ON. The voltme-
ter will indicate a voltage and, at the same time, the light
will come on.
4) The circuit is in good order. If a problem such as a lamp
failing to light occurs, use the procedures outlined above to
track down the malfunction.
8
6-3WIRING DIAGRAM
2. Basic Diagnostics Procedures

No. Load
MB-1Fuse holder (Rear power supply & seat
heater)
MB-2 Power window circuit breaker
MB-3Engine control module
Fuel pump relay
Main relay
OBD-II service connector
MB-4 A/C relay holder
MB-5 Headlight alarm relay (with security)
MB-6 Headlight LH
MB-7Daytime running light control module
Diode (Lighting)
Diode (Security)
Lighting switch
MB-8Combination meter
Front fog light switch
Headlight RH
Front fog light relay
MB-9Door lock timer
Headlight alarm relay
Interrupt relay
Radio
Security control module
Security indicator light
Spot light
Room light
Step light
Combination meter
Luggage room light
Trailer connector
Trunk room light
MB-10 A/C relay holder
SBF-6ABS relay box
TCS motor relay
SBF-7 TCS valve relay
ALT-1Combination meter
Daytime running light control module
Diode (TCS)
IG Headlight alarm relay
STCruise control module
Engine control module
Inhibitor switch (AT)
Interrupt relay
Starter interlock relay (MT)
FB-1Front washer motor
Rear washer motor
FB-2 Diode (A/C)
FB-3A/C relay holder
Sub fan motor
FB-4Engine control module
Fuel pump relay
Ignition coil
Transmission control module
FB-5 ABS relay boxNo. Load
FB-6Side marker light LH
Side marker light RH
FB-7 Door lock timer
FB-9 Hazard switch
FB-10AT shift lock control module
Key warning switch
Power antenna
FB-11 Radio
FB-12 Cigarette lighter socket
FB-13Mirror heater
Rear power supply relay
Remote control rearview mirror switch
Security control module
Vanity mirror illumination light
FB-14AT shift lock control module
Combination switch
Front wiper motor
Rear wiper motor
Rear wiper relay
FB-15ABS/TCS control module
Transmission control module
FB-16Rear defogger
Rear defogger condenser
Rear defogger switch
FB-17 Rear defogger switch
FB-18AT shift lock control module
Back-up light switch (MT)
Inhibitor switch (AT)
FB-19 Hazard switch
FB-20A/C switch
Combination meter
Mode control panel
TCS off switch
FB-21 Combination meter (Airbag)
FB-22Blower motor relay
Check connector
Daytime running light control module
Daytime running light relay
FRESH/RECIRC actuator
Hi-beam relay
Power window and sunroof relay
Seat belt timer
FB-23 Airbag control module
20
6-3WIRING DIAGRAM
6. Wiring Diagram

No. Load
MB-2 Power window circuit breaker
MB-3Engine control module
Fuel pump relay
Main relay
OBD-II service connector
MB-4 A/C relay holder
MB-6 Headlight LH
MB-7Diode (Lighting)
Lighting switch
MB-8Combination meter
Headlight RH
MB-9Combination meter
Door lock timer
Luggage room light
Radio
Room light
MB-10 A/C relay holder
ALT-1 Combination meter
IG A/C relay holder
STCruise control module
Engine control module
Inhibitor switch
FB-2 Diode (A/C)
FB-3Sub fan motor
Sub fan relay-2
FB-4Engine control module
Fuel pump relay
Ignition coil
Transmission control module
FB-6Side marker light LH
Side marker light RH
FB-7 Door lock timer
FB-9 Hazard switch
FB-10AT shift lock control module
Key warning switch
Power antenna
FB-11 Radio
FB-12 Cigarette lighter
FB-13 Remote control rearview mirror switch
FB-14AT shift lock control module
Combination switch
Front washer motor
Front wiper motor
Rear washer motor
Rear wiper motor
Rear wiper relay
FB-15 Transmission control moduleNo. Load
FB-16Rear defogger
Rear defogger condenser
Rear defogger switch
FB-17 Rear defogger switch
FB-18AT shift lock control module
Inhibitor switch
FB-19 Hazard switch
FB-20Combination meter
Mode control panel
FB-21 Combination meter (Airbag)
FB-22Blower motor relay
Check connector
FRESH/RECIRC actuator
Mode actuator
Power window relay
Seat belt timer
FB-23 Airbag control module
FB-24 Airbag control module
FB-25 Lighting switch
FB-26 Parking switch
FB-27 Parking switch
FB-28 Illumination light
FB-29 Illumination light
FB-30Stop light switch
Stop & brake switch
FB-31 Horn relay
FB-32 Blower motor relay
FB-33 Parking switch
FB-34License plate light LH
License plate light RH
Rear combination light LH
Rear combination light RH
Rear finisher light LH
Rear finisher light RH
FB-35Cruise control main switch
Cruise control module
24
6-3WIRING DIAGRAM
6. Wiring Diagram