1997 SUBARU LEGACY brake sensor

B2M0656
BI: DTC P0705
—TRANSMISSION RANGE SENSOR CIRCUIT
MALFUNCTION—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
TROUBLE SYMPTOM:

Starter does not rotate when selector lever is in“P”or
“N”range.

Starter rotates when selector lever is in“R”,“D”,“3”,“2”
or“1”range.

Engine brake is not effected when selector lever is in“3”
range.

Shift characteristics are erroneous.
WIRING DIAGRAM:
B2M1106
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

299
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles

10BQ5CHECK VEHICLE SPEED SENSOR 2 CIR-
CUIT.
Check vehicle speed sensor 2 circuit.
: Is there any trouble in vehicle speed sensor
2 circuit?
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step10BQ6.
10BQ6
CHECK ENGINE SPEED INPUT CIRCUIT.
Check engine speed input circuit.
: Is there any trouble in engine speed input
circuit?
: Repair or replace engine speed input circuit.
: Go to step10BQ7.
10BQ7
CHECK INHIBITOR SWITCH CIRCUIT.
Check inhibitor switch circuit.
: Is there any trouble in inhibitor switch cir-
cuit?
: Repair or replace inhibitor switch circuit.
: Go to step10BQ8.
10BQ8
CHECK BRAKE LIGHT SWITCH CIRCUIT.
Check brake light switch circuit.
: Is there any trouble in brake light switch cir-
cuit?
: Repair or replace brake light switch circuit.
: Go to step10BQ9.
319
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles

OBD0501
CY: DTC P1700
—THROTTLE POSITION SENSOR CIRCUIT
MALFUNCTION FOR AUTOMATIC
TRANSMISSION—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
TROUBLE SYMPTOM:

Shift point too high or too low; engine brake not effected
in“3”range; excessive shift shock; excessive tight corner
“braking”
WIRING DIAGRAM:
B2M0613
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

409
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

4. Schematic
B3M0376A
1Ignition switch

2Combination meter

3Speedometer circuit

4Inhibitor switch

5Vehicle speed sensor 2

6Vehicle speed sensor 1

7Throttle position sensor

8Diagnosis switch

9FWD switch (AWD)
10Data link connector

11ABS control module

12Engine speed signal

13Torque control signal

14Torque control cut signal

15Mass air flow signal

16ATF temperature sensor

17Dropping resistor
18Duty solenoid A

19Duty solenoid B

20Duty solenoid C (AWD)

21Shift solenoid 1

22Shift solenoid 2

23Shift solenoid 3

24Brake switch

25Cruise set switch
8
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
4. Schematic

K: TROUBLE CODE 31
—THROTTLE POSITION SENSOR—
DIAGNOSIS:
Input signal circuit of throttle position sensor is open or
shorted.
TROUBLE SYMPTOM:
Shift point too high or too low; engine brake not effected in
“3”range; excessive shift shock; excessive tight corner
“braking”
1. Check harness connector between TCM and
throttle position sensor.
OK
Not OK
Repair or replace harness connectors.
2. Check throttle position sensor.
OK
Not OK
Replace throttle position sensor.
3. Check input signal for TCM.
Not OK
OK

Repair TCM connector terminal poor contact.

Replace TCM.
4. Check power supply to throttle position
sensor.
OK
Not OK
Repair or replace harness connectors.

Repair TCM connector terminal poor contact.

Replace TCM.
B2M0613




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

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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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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70
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
9. General Diagnostic Table