1997 SUBARU LEGACY transmission fluid

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

DTC
No.Abbreviation
(Subaru Select Monitor)Item Page
P0341 CAM
—R Camshaft position sensor circuit range/performance problem 463
P0400 EGR Exhaust gas recirculation flow malfunction 464
P0403 EGRSOL Exhaust gas recirculation circuit low input 465
P0420 CAT Catalyst system efficiency below threshold 466
P0440 EVAP Evaporative emission control system malfunction 467
P0441 CPC
—F Evaporative emission control system incorrect purge flow 468
P0443 CPC Evaporative emission control system purge control valve circuit low input 469
P0446 VCMSOL
—LO Evaporative emission control system vent control low input 470
P0451 TNKP
—F Evaporative emission control system pressure sensor range/performance problem 473
P0452 TNKP
—LOW Evaporative emission control system pressure sensor low input 474
P0453 TNKP
—HI Evaporative emission control system pressure sensor high input 479
P0461 FLVL
—R Fuel level sensor circuit range/performance problem 484
P0462 FLVL
—LOW Fuel level sensor circuit low input 486
P0463 FLVL
—HI Fuel level sensor circuit high input 492
P0500 VSP Vehicle speed sensor malfunction 497
P0505 ISC Idle control system malfunction 498
P0506 ISC
—RLOW Idle control system RPM lower than expected 499
P0507 ISC
—RHI Idle control system RPM higher than expected 500
P0600—Serial communication link malfunction 501
P0601 RAM Internal control module memory check sum error 502
P0703 ATBRK Brake switch input malfunction 503
P0705 ATRNG Transmission range sensor circuit malfunction 504
P0710 ATF Transmission fluid temperature sensor circuit malfunction 505
P0720 ATVSP Output speed sensor (vehicle speed sensor 1) circuit malfunction 506
P0725 ATNE Engine speed input circuit malfunction 507
P0731 ATGR1 Gear 1 incorrect ratio 508
P0732 ATGR2 Gear 2 incorrect ratio 508
P0733 ATGR3 Gear 3 incorrect ratio 508
P0734 ATGR4 Gear 4 incorrect ratio 508
P0740 ATLU
—F Torque converter clutch system malfunction 510
P0743 ATLU Torque converter clutch system electrical 511
P0748 ATPL Pressure control solenoid electrical 512
P0753 ATSFT1 Shift solenoid A electrical 513
P0758 ATSFT2 Shift solenoid B electrical 514
P0760 ATOVR
—F Shift solenoid C malfunction 515
P0763 ATOVR Shift solenoid C electrical 516
P1100 ST
—SWOFF Starter switch circuit low input 517
P1101 N
—SWOFF Neutral position switch circuit high input [AT vehicles] 518
P1102 BR Pressure sources switching solenoid valve circuit low input 519
P1103 TRQ Engine torque control signal circuit malfunction 520
P1120 ST
—SWON Starter switch circuit high input 521
P1121 N
—SWON Neutral position switch circuit low input [AT vehicles] 522
424
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

OBD0380
BJ: DTC P0710
—TRANSMISSION FLUID TEMPERATURE
SENSOR CIRCUIT MALFUNCTION—
WIRING DIAGRAM:
OBD0383
NOTE:
Check automatic transmission fluid temperature sensor cir-
cuit.

505
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles