1997 SUBARU LEGACY check transmission fluid

G3M0282
2. On-Car Service
A: INSPECTION
1. ATF LEVEL
1) Raise ATF temperature to 60 to 80°C (140 to 176°F)
from 40 to 60°C (104 to 140°F) (when cold) by driving a
distance of 5 to 10 km (3 to 6 miles).
NOTE:
The level of ATF varies with fluid temperature. Pay atten-
tion to the fluid temperature when checking oil level.
2) Make sure the vehicle is level. After selecting all posi-
tions (P, R, N, D, 3, 2, 1), set the selector leveler in“P”
range. Measure fluid level with the engine idling.
NOTE:
After running, idle the engine for one or two minutes before
measurement.
3) If the fluid level is below the center between upper and
lower marks, add the recommended ATF until the fluid level
is found within the specified range (above the center
between upper and lower marks). When the transmission
is hot, the level should be above the center of upper and
lower marks, and when it is cold, the level should be found
below the center of these two marks.
CAUTION:
Use care not to exceed the upper limit level.
ATF level varies with temperature. Remember that
the addition of fluid to the upper limit mark when the
transmission is cold will result in the overfilling of
fluid.
4) Fluid temperature rising speed
By idling the engine
Time for temperature rise to 60°C (140°F) with atmo-
spheric temperature of 0°C (32°F): More than 25 minutes

Time for temperature rise to 30°C (86°F) with atmo-
spheric temperature of 0°C (32°F): Approx. 8 minutes
By running the vehicle
Time for temperature rise to 60°C (140°F) with atmo-
spheric temperature of 0°C (32°F): More than 10 minutes
5) Method for checking fluid level upon delivery or at peri-
odic inspection
Check fluid level after a warm-up run of approx. 10 min-
utes. During the warm-up period, the automatic transmis-
sion functions can also be checked.
23
3-2SERVICE PROCEDURE
2. On-Car Service

G3M0859
Transmission cover
Transmission cover (Defective casting)
The point listed above should be checked for fluid leak.
Checking method is as follows:
(1) Place the vehicle in the pit, and check whether the
leaking oil is ATF or not. The ATF is wine red in color,
and can be discriminated easily from engine oil and
gear oil.
(2) Wipe clean the leaking oil and dust from a suspect-
able area, using a non-inflammable organic solvent
such as carbon tetrachloride.
(3) Run the engine to raise the fluid temperature, and
set the selector lever to“D”in order to increase the fluid
pressure and quickly detect a leaking point. Also check
for fluid leaks while shifting select lever to“R”,“2”, and
“1”.
G3M0289
B: ADJUSTMENT
1. BRAKE BAND
If the following abnormal shifting conditions are noted in a
road test, the brake band must be adjusted.
Improper brake band clearances and their symptoms
Clearance Problem
1. Too wide Upshift from 1st directly to 3rd gear occurs.
2. WideEngine rpm increases abruptly while upshifting from 1st
to 2nd gear or 3rd to 4th gear.
Time lag of at least one second occurs during kickdown
operation from 3rd to 2nd gear.
3. Small“Braking”symptom occurs while upshifting from 2nd to 3rd
gear.
4. Too smallUpshifts from 2nd to 4th gear and downshifts from 4th to
2nd gear occur repeatedly.
26
3-2SERVICE PROCEDURE
2. On-Car Service

B: INSPECTION
1) Check connected and fixed condition of connector.
2) Check valve relay and motor relay for discontinuity or
short circuits.
Condition Terminal number Standard Diagram Terminal location
Valve relayTurning off
electricity.85—86 103±10Ω
G4M0456G4M0457
30—87a less than 0.5Ω
30—87 less than 1 MΩ
Turning on
electricity between
85 and 86.
(DC 12 V)30—87a more than 1 MΩ
30—87 less than 0.5Ω
Motor relayTurning off
electricity.85—86 80±8Ω
G4M0458G4M0459
30—87 more than 1 MΩ
Turning on
electricity between
85 and 86.
(DC 12 V)30—87 less than 0.5Ω
C: CHECKING THE HYDRAULIC UNIT ABS
OPERATION
1. CHECKING THE HYDRAULIC UNIT ABS
OPERATION BY PRESSURE GAUGE
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL and FR
caliper bodies.
B4M0633A
3) Connect two pressure gauges to the FL and FR caliper
bodies.
CAUTION:

Pressure gauges used exclusively for brake fluid
must be used.

Do not employ pressure gauge previously used for
transmission since the piston seal is expanded which
may lead to malfunction of the brake.
NOTE:
Wrap sealing tape around the pressure gauge.
80
4-4SERVICE PROCEDURE
15. Hydraulic Unit for ABS System (ABS 5.3 Type)

C: CHECKING THE HYDRAULIC UNIT ABS
OPERATION
1. CHECKING THE HYDRAULIC UNIT ABS
OPERATION BY PRESSURE GAUGE
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL and FR
caliper bodies.
B4M0633A
3) Connect two pressure gauges to the FL and FR caliper
bodies.
CAUTION:

Pressure gauges used exclusively for brake fluid
must be used.

Do not employ pressure gauge previously used for
transmission since the piston seal is expanded which
may lead to malfunction of the brake.
NOTE:
Wrap sealing tape around the pressure gauge.
4) Bleed air from the pressure gauges.
5) Perform ABS sequence control.
6) When the hydraulic unit begins to work, and first the FL
side performs decompression, holding, and compression,
and then the FR side performs decompression, holding,
and compression.
7) Read values indicated on the pressure gauge and
check if the fluctuation of the values between decompres-
sion and compression meets the standard values. Also
check if any irregular brake pedal tightness is felt.
Initial value When decompressed When compressed
Front wheel 3,432 kPa (35 kg/cm
2, 498 psi)490 kPa (5 kg/cm2, 71 psi)
or less981 kPa (10 kg/cm2, 142 psi)
or more
Rear wheel 3,432 kPa (35 kg/cm
2, 498 psi)490 kPa (5 kg/cm2, 71 psi)
or less981 kPa (10 kg/cm2, 142 psi)
or more
8) Remove pressure gauges and air bleeder screws from
the RL and RR caliper bodies.
9) Connect the air bleeder screws hose to the FL and FR
caliper bodies.
10) Connect two pressure gauges to the RL and RR cali-
per bodies.
11) Bleed air from the pressure gauges and the FL and FR
caliper bodies.
12) Perform ABS sequence control. [W20D0].>
13) When the hydraulic unit begins to work, at first the RR
side performs decompression, holding, and compression,
and then the RL side performs decompression, holding,
and compression.
14) Read values indicated on the pressure gauges and
check if they meet the standard value.
107
4-4SERVICE PROCEDURE
20. Hydraulic Unit for ABS/TCS System

E: CHECKING THE HYDRAULIC UNIT TCS
OPERATION
1. CHECKING THE HYDRAULIC UNIT TCS
OPERATION BY PRESSURE GAUGE
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL and FR
caliper bodies.
B4M0633A
3) Connect two pressure gauges to the FL and FR caliper
bodies.
CAUTION:

Pressure gauges used exclusively for brake fluid
must be used.

Do not employ pressure gauge previously used for
transmission since the piston seal is expanded which
may lead to malfunction of the brake.
NOTE:
Wrap sealing tape around the pressure gauge.
4) Bleed air from the pressure gauges.
5) Perform sequence control.
6) When the hydraulic unit begins to work, and first the FL
side performs compression, holding, and decompression,
and then the FR side performs compression, holding, and
decompression.
7) Read values indicated on the pressure gauge and
check if the fluctuation of the values between compression
and decompression meets the standard values. Also check
if any irregular brake pedal tightness is felt.
Initial value When compressed When decompressed
Front left wheel490 kPa (5 kg/cm
2, 71 psi)
or less1,471 kPa (15 kg/cm2, 213 psi)
or more490 kPa (5 kg/cm2, 71 psi)
or less
Front right wheel490 kPa (5 kg/cm
2, 71 psi)
or less1,471 kPa (15 kg/cm2, 213 psi)
or more490 kPa (5 kg/cm2, 71 psi)
or less
8) After checking, remove the pressure gauges from the
caliper bodies.
9) Connect the air bleeder screws to the FL and FR cali-
per bodies.
10) Bleed air from brake line.
11 3
4-4SERVICE PROCEDURE
20. Hydraulic Unit for ABS/TCS System

B: INSPECTION
1) Check connected and fixed condition of connector.
B4M1248A
2) Check specifications of the mark with ABSCM&H/U.
Mark Model
C3 AWD AT
C4 AWD MT
C: CHECKING THE HYDRAULIC UNIT ABS
OPERATION
1. CHECKING THE HYDRAULIC UNIT ABS
OPERATION BY PRESSURE GAUGE
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL and FR
caliper bodies.
B4M0633A
3) Connect two pressure gauges to the FL and FR caliper
bodies.
CAUTION:

Pressure gauges used exclusively for brake fluid
must be used.

Do not employ pressure gauge previously used for
transmission since the piston seal is expanded which
may lead to malfunction of the brake.
NOTE:
Wrap sealing tape around the pressure gauge.
123
4-4SERVICE PROCEDURE
22. ABS Control Module and Hydraulic Control Unit (ABSCM&H/U) (ABS 5.3i Type)

DTC
No.Abbreviation
(Subaru Select Monitor)Item Page
P0341 CAM
—R Camshaft position sensor circuit range/performance problem 230
P0400 EGR Exhaust gas recirculation flow malfunction 232
P0403 EGRSOL Exhaust gas recirculation circuit low input 237
P0420 CAT Catalyst system efficiency below threshold 240
P0440 EVAP Evaporative emission control system malfunction 242
P0441 CPC
—F Evaporative emission control system incorrect purge flow 246
P0443 CPC Evaporative emission control system purge control valve circuit low input 248
P0446 VCMSOL
—LO Evaporative emission control system vent control low input 251
P0451 TNKP
—F Evaporative emission control system pressure sensor range/performance problem 254
P0452 TNKP
—LOW Evaporative emission control system pressure sensor low input 256
P0453 TNKP
—HI Evaporative emission control system pressure sensor high input 261
P0461 FLVL
—R Fuel level sensor circuit range/performance problem 267
P0462 FLVL
—LOW Fuel level sensor circuit low input 269
P0463 FLVL
—HI Fuel level sensor circuit high input 275
P0500 VSP Vehicle speed sensor malfunction 281
P0505 ISC Idle control system malfunction 283
P0506 ISC
—RLOW Idle control system RPM lower than expected 289
P0507 ISC
—RHI Idle control system RPM higher than expected 291
P0600—Serial communication link malfunction 293
P0601 RAM Internal control module memory check sum error 295
P0703 ATBRK Brake switch input malfunction 296
P0705 ATRNG Transmission range sensor circuit malfunction 299
P0710 ATF Transmission fluid temperature sensor circuit malfunction 311
P0720 ATVSP Output speed sensor (vehicle speed sensor 1) circuit malfunction 312
P0725 ATNE Engine speed input circuit malfunction 313
P0731 ATGR1 Gear 1 incorrect ratio 314
P0732 ATGR2 Gear 2 incorrect ratio 314
P0733 ATGR3 Gear 3 incorrect ratio 314
P0734 ATGR4 Gear 4 incorrect ratio 314
P0740 ATLU
—F Torque converter clutch system malfunction 317
P0743 ATLU Torque converter clutch system electrical 321
P0748 ATPL Pressure control solenoid electrical 322
P0753 ATSFT1 Shift solenoid A electrical 323
P0758 ATSFT2 Shift solenoid B electrical 324
P0760 ATOVR
—F Shift solenoid C malfunction 325
P0763 ATOVR Shift solenoid C electrical 328
P1100 ST
—SWOFF Starter switch circuit low input 329
P1101 N
—SW Neutral position switch circuit malfunction [MT vehicles] 331
P1101 N
—SWOFF Neutral position switch circuit high input [AT vehicles] 335
P1102 BR Pressure sources switching solenoid valve circuit low input 340
P1103 TRQ Engine torque control signal circuit malfunction 343
P1104 TCS
—LOW TCS signal circuit low input 346
130
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles

OBD0380
BJ: DTC P0710
—TRANSMISSION FLUID TEMPERATURE
SENSOR CIRCUIT MALFUNCTION—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
TROUBLE SYMPTOM:

No shift up to 4th speed (after engine warm-up)

No lock-up (after engine warm-up)

Excessive shift shock
WIRING DIAGRAM:
OBD0383
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

10BJ1
CHECK DTC P0710 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0710?
: Check ATF temperature sensor circuit. 3-2 [T7F0].>
: It is not necessary to inspect DTC P0710.
311
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles