SUBARU LEGACY 1997 Service Repair Manual
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: Connector & terminal
(B54) No. 3 (+)—Chassis ground ( ):
Is the voltage less than1Vin“2”posi-
tion?
Is the voltage more than6Vinother
positions?
: Go to next.
:Goto.
: Connector & terminal
(B54) No. 4 (+)—Chassis ground ( ):
Is the voltage less than1Vin“1”posi-
tion?
Is the voltage more than6Vinother
positions?
: Repair poor contact in TCM connector.
:Goto.
: Is there poor contact in TCM connector?
: Repair poor contact in TCM connector.
: Replace TCM.
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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.
<Ref. to 2-7 [T3D0] and [T3E0].>
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. <Ref. to
3-2 [T7F0].>
: It is not necessary to inspect DTC P0710.
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OBD0392
BK: DTC P0720
—OUTPUT SPEED SENSOR (VEHICLE
SPEED SENSOR 1) CIRCUIT MALFUNCTION
—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
No shift or excessive tight corner“braking”
WIRING DIAGRAM:
B2M0584
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
10BK1
CHECK DTC P0720 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0720?
: Check vehicle speed sensor 1 circuit. <Ref. to 3-2
[T7L0].>
: It is not necessary to inspect DTC P0720.
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OBD0404
BL: DTC P0725
—ENGINE SPEED INPUT CIRCUIT
MALFUNCTION—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
No lock-up (after engine warm-up)
AT diagnostic indicator light (AT OIL TEMP indicator
light) remains on when vehicle speed is“0”.
WIRING DIAGRAM:
B2M0585
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
10BL1
CHECK DTC P0725 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0725?
: Check engine speed input signal circuit. <Ref. to
3-2 [T7H0].>
: It is not necessary to inspect DTC P0725.
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B2M0657
BM: DTC P0731
—GEAR 1 INCORRECT RATIO—
B2M0658
BN: DTC P0732
—GEAR 2 INCORRECT RATIO—
B2M0659
BO: DTC P0733
—GEAR 3 INCORRECT RATIO—
B2M0660
BP: DTC P0734
—GEAR 4 INCORRECT RATIO—
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”
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WIRING DIAGRAM:
B2M1287
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
10BP1CHECK ANY OTHER DTC (BESIDES DTC
P0731, P0732, P0733, P0734) ON DIS-
PLAY.
: Is there any other DTC on display?
: Inspect relevant DTC using“10. Diagnostics Chart
with Trouble Code”. <Ref. to 2-7 [T10A0].>
: Go to step10BP2.
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10BP2CHECK THROTTLE POSITION SENSOR
CIRCUIT.
Check throttle position sensor circuit. <Ref. to 3-2 [T7K0].>
: Is there any trouble in throttle position sen-
sor circuit?
: Repair or replace throttle position sensor circuit.
: Go to step10BP3.
10BP3CHECK VEHICLE SPEED SENSOR 1 CIR-
CUIT.
Check vehicle speed sensor 1 circuit. <Ref. to 3-2 [T7L0].>
: Is there any trouble in vehicle speed sensor
1 circuit?
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step10BP4.
10BP4CHECK VEHICLE SPEED SENSOR 2 CIR-
CUIT.
Check vehicle speed sensor 2 circuit. <Ref. to 3-2 [T7M0].>
: Is there any trouble in vehicle speed sensor
2 circuit?
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step10BP5.
10BP5
CHECK ENGINE SPEED INPUT CIRCUIT.
Check engine speed input circuit. <Ref. to 3-2 [T7H0].>
: Is there any trouble in engine speed input
circuit?
: Repair or replace engine speed input circuit.
: Go to next.
: Is there poor contact in TCM connector?
: Repair poor contact in TCM connector.
: Go to next.
: Is there any mechanical trouble in automatic
transmission?
: Repair or replace automatic transmission.
: Replace TCM.
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B2M0661
BQ: DTC P0740
—TORQUE CONVERTER CLUTCH SYSTEM
MALFUNCTION—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
No lock-up (after engine warm-up)
No shift or excessive tight corner“braking”
WIRING DIAGRAM:
B2M1109
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CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
10BQ1CHECK ANY OTHER DTC (BESIDES DTC
P0740) ON DISPLAY.
: Is there any other DTC on display?
: Inspect the relevant DTC using“10. Diagnostics
Chart with Trouble Code”. <Ref. to 2-7 [T10A0].>
: Go to step10BQ2.
10BQ2
CHECK DUTY SOLENOID B CIRCUIT.
Check duty solenoid B circuit. <Ref. to 3-2 [T7B0].>
: Is there any trouble in duty solenoid B cir-
cuit?
: Repair or replace duty solenoid B circuit.
: Go to step10BQ3.
10BQ3CHECK THROTTLE POSITION SENSOR
CIRCUIT.
Check throttle position sensor circuit. <Ref. to 3-2 [T7K0].>
: Is there any trouble in throttle position sen-
sor circuit?
: Repair or replace throttle position sensor circuit.
: Go to step10BQ4.
10BQ4CHECK VEHICLE SPEED SENSOR 1 CIR-
CUIT.
Check vehicle speed sensor 1 circuit. <Ref. to 3-2 [T7L0].>
: Is there any trouble in vehicle speed sensor
1 circuit?
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step10BQ5.
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10BQ5CHECK VEHICLE SPEED SENSOR 2 CIR-
CUIT.
Check vehicle speed sensor 2 circuit. <Ref. to 3-2 [T7M0].>
: 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. <Ref. to 3-2 [T7H0].>
: 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. <Ref. to 2-7 [T10BI0].>
: 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. <Ref. to 2-7 [T10BH0].>
: Is there any trouble in brake light switch cir-
cuit?
: Repair or replace brake light switch circuit.
: Go to step10BQ9.
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10. Diagnostic Chart with Trouble Code for LHD Vehicles