1997 SUBARU LEGACY automatic transmission and differential

1. CHECK OPERATION OF SPEEDOMETER.
Make sure that speedometer indicates the vehicle speed
by driving the vehicle.
B3M0250
2. CHECK HARNESS CONNECTOR BETWEEN TCM
AND COMBINATION METER.
1) Turn ignition switch to OFF.
2) Remove combination meter.
B3M0251B
3) Disconnect connectors from TCM.
4) Measure resistance of harness connector between
TCM and combination meter.
Connector & terminal / Specified resistance:
(B56) No. 11—(i10) No. 10 / 1Ω, or less
B3M0414A
5) Measure resistance of harness connector between
combination meter and body to make sure that circuit does
not short.
Connector & terminal / Specified resistance:
(i10) No. 10—Body/1MΩ, or more
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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0289
3. CHECK VEHICLE SPEED SENSOR 2.
1) Install combination meter.
2) Connect connector to TCM.
3) Lift-up the vehicle and place safety stand.
CAUTION:
On AWD models, raise all wheels off floor.
4) Disconnect connector from vehicle speed sensor 2.
5) Measure resistance between terminals of vehicle speed
sensor 2.
Terminals / Specified resistance:
(B17) No. 1—No. 2 / 350—450Ω
No. 1—Body/1MΩ, or more
No. 2—Body/1MΩ, or more
B3M0256
6) Push the TCS OFF switch to ON. (With TCS models)
7) Start the engine and set vehicle in 20 km/h (12 MPH)
condition.
8) Measure output signal of vehicle speed sensor 2.
WARNING:
Be careful not to be caught up by the running wheels.
9) Using a voltage meter; measure voltage between termi-
nals of vehicle speed sensor 2.
Terminals / Specified voltage:
(B17) No. 1—No. 2 / AC 2 V, or more
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.
or 4-4d [T6D2] or [T9J0].>
50
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0257

Using oscilloscope:
(1) Install combination meter.
(2) Connect connector to TCM.
(3) Lift-up the vehicle and place safety stand.
WARNING:
On AWD models, make sure that all wheels are raised
off floor.
(4) Set oscilloscope to vehicle speed sensor 2.
Connector & terminal / No. 1—No. 2
B3M0254A
(5) Push the TCS OFF switch to ON. (With TCS mod-
els)
(6) Start the engine, and drive the wheels slowly.
(7) Measure signal voltage indicated on oscilloscope.
Specified voltage: AC 2 V, or more
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.
or 4-4d [T6D2] or [T9J0].>
B3M0369A
4. CHECK INPUT SIGNAL FOR TCM.
1) Connect connector to vehicle speed sensor 2.
2) Lift-up the vehicle or set the vehicle on free roller.
CAUTION:
On AWD models, raise all wheels off floor.
3) Push the TCS OFF switch to ON. (With TCS models)
4) Start the engine, and drive the wheels slowly.
5) Measure voltage between TCM and body.
Connector & terminal / Specified voltage:
(B56) No. 11—Body / Less than 1↔
more than 9 V
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.
or 4-4d [T6D2] or [T9J0].>
51
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

OBD0145A

Using Subaru select monitor:
(1) Install combination meter.
(2) Connect connectors to TCM and vehicle speed
sensor 2.
(3) Lift-up the vehicle or set the vehicle on free roller.
(4) Turn ignition switch to OFF.
(5) Connect the Subaru select monitor to data link con-
nector.
(6) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
CAUTION:
On AWD models, raise all wheels off floor.
(7) Push the TCS OFF switch to ON. (With TCS mod-
els)
G3M0726
B3M0384
(8) Start the engine, and drive the wheels.
(9) Read data on Subaru select monitor.
(10) Designate mode using function key.
Function mode: F04 or F05
SPECIFIED DATA:
Compare speedometer with select monitor indica-
tions.

F04: Vehicle speed is indicated in mile per hour (MPH).

F05: Vehicle speed is indicated in kilometer per hour
(km/h).
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.
or 4-4d [T6D2] or [T9J0].>
B3M0248B

Using oscilloscope:
(1) Connect connector to vehicle speed sensor 2.
(2) Lift-up the vehicle or set the vehicle on free rollers.
CAUTION:
On AWD models, raise all wheels off floor.
(3) Set oscilloscope to TCM connector terminals.
Connector & terminals:
Positive probe; (B56) No. 11
Earth lead; Body
52
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

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.
or 4-4d [T6D2] or [T9J0].>
53
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

8. Diagnostic Chart with Select Monitor
A: BASIC DIAGNOSTIC CHART
If no trouble codes appear in the on-board diagnostic
operation (although problems have occurred or are
occurring), measure performance characteristics of
sensors, actuators, etc., in the“F”mode (select monitor
function), and compare with the“basic data”to determine
the cause of problems.
Trouble occurs.
No trouble codes appear in on-board diagnostic operation.
Measure each item in select mode function.
Compare measured values with basic data.
Determine item which is outside basic data specifications.
Check sensor and actuator affected.





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8. Diagnostic Chart with Select Monitor

B: LIST OF OUTPUT MODES
1. FUNCTION MODE
Mode Contents Abbr. Unit Contents of display Page
F00 Mode display——AT or EGI mode (when monitor is connected.) 57
F01 Battery voltage VB V Battery voltage applied to control unit. 57
F02 Vehicle speed sensor 1 VSP1 m/h Vehicle speed (miles/h) sent from vehicle speed sensor 1. 58
F03 Vehicle speed sensor 1 VSP1 km/h Vehicle speed (km/h) sent from vehicle speed sensor 1. 58
F04 Vehicle speed sensor 2 VSP2 m/h Vehicle speed (miles/h) sent from vehicle speed sensor 2. 58
F05 Vehicle speed sensor 2 VSP2 km/h Vehicle speed (km/h) sent from vehicle speed sensor 2. 58
F06 Engine speed EREV rpm Engine speed sent from ECM. 59
F07 ATF temperature sensor ATFT°F ATF temperature (°F) sent from ATF temperature sensor. 59
F08 ATF temperature sensor ATFT°C ATF temperature (°C) sent from ATF temperature sensor. 59
F09 Throttle position sensor THV V Voltage sent from throttle position sensor. 60
F10 Gear position GEAR—Transmission gear position 60
F11 Line pressure duty PLDTY % Duty ratio flowing through duty solenoid A. 61
F12 Lock-up duty LUDTY % Duty ratio flowing through duty solenoid B. 62
F13 AWD duty 4WDTY % Duty ratio flowing through duty solenoid C. 63
F14Throttle position sensor
power supplyTHVCC V Power supply voltage to throttle position sensor 64
F15 Mass air flow signal AFM V Output voltage from air flow sensor 64
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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

2. ON←→OFF SIGNAL LIST
Mode LED No. Signal name Display LED“ON”requirements Page
FA 01 FWD switch FF When fuse is installed in FWD switch.—
2 Kick-down switch KD—
3—— —
4—— —
5 Brake switch BR When brake switch is turned ON.—
6 ABS switch AB When ABS signal is entered.—
7 Cruise control set CR When cruise control is set.—
8 Power switch PW—
9—— —
10—— —
FA 11 P/N range switch NP When P or N range is selected.—
2 R range switch RR When R range is selected.—
3 D range switch RD When D range is selected.—
4 3 range switch R3 When 3 range is selected.—
5 2 range switch R2 When 2 range is selected.—
6 1 range switch R1 When 1 range is selected.—
7 Diagnosis switch SS When diagnosis switch is turned ON. 66
8—— —
9—— —
10—— —
NOTE; LED Nos. 2 and 8 cannot be turned on.
3. DIAGNOSIS MODE
Mode Contents Abbr. Contents of display
FB0On-board
diagnosticsDIAG.U Current trouble code determined by on-board diagnostics.
FB1On-board
diagnosticsDIAG.MPrevious trouble code stored in memory by on-board
diagnostics.
FC0 Back-up clear—Function of clearing trouble code stored in memory.
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8. Diagnostic Chart with Select Monitor