Subaru Legacy III (2000-2003 year). Service manual — part 159
EN(H4SO)-248
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
BG:DTC P0731 — GEAR 1 INCORRECT RATIO —
NOTE:
For the diagnostic procedure, refer to DTC P0734. <Ref. to EN(H4SO)-250, DTC P0734 — GEAR 4 INCOR-
RECT RATIO —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
BH:DTC P0732 — GEAR 2 INCORRECT RATIO —
NOTE:
For the diagnostic procedure, refer to DTC P0734. <Ref. to EN(H4SO)-250, DTC P0734 — GEAR 4 INCOR-
RECT RATIO —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
BI: DTC P0733 — GEAR 3 INCORRECT RATIO —
NOTE:
For the diagnostic procedure, refer to DTC P0734. <Ref. to EN(H4SO)-250, DTC P0734 — GEAR 4 INCOR-
RECT RATIO —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
EN(H4SO)-249
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
MEMO:
EN(H4SO)-250
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
BJ: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”
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(H4SO)-47, OPER-
ATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)-40, OPERATION, Inspection
Mode.> .
• WIRING DIAGRAM:
Step
Value
Yes
No
1
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
DTC indicated.
Inspect relevant
DTC using “List of
Diagnostic Trou-
ble Code (DTC)”.
<Ref. to
EN(H4SO)-83, List
of Diagnostic
Trouble Code
(DTC).>
2
CHECK THROTTLE POSITION SENSOR
CIRCUIT.
Check throttle position sensor circuit.
Is there any trouble in throttle position sensor
circuit?
<Ref. to AT-52, DTC 31 THROTTLE POSI-
TION SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
There is a fault.
Repair or replace
throttle position
sensor circuit.
3
CHECK FRONT VEHICLE SPEED SENSOR
CIRCUIT.
Check front vehicle speed sensor circuit.
Is there any trouble in vehicle speed sensor 2
circuit?
<Ref. to AT-58, DTC 33 FRONT VEHICLE
SPEED SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
There is a fault.
Repair or replace
vehicle speed sen-
sor 2 circuit.
4
CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR CIRCUIT.
Check torque converter turbine speed sensor
circuit.
Is there any trouble in torque converter turbine
speed sensor circuit?
<Ref. to AT-64, DTC 36 TORQUE CON-
VERTER TURBINE SPEED SENSOR, Diag-
nostic Procedure with Diagnostic Trouble
Code (DTC).>
There is a fault.
Repair or replace
torque converter
turbine speed sen-
sor circuit.
5
CHECK POOR CONTACT.
Check poor contact in TCM connector.
Is there poor contact in TCM connector?
There is poor contact.
Repair poor con-
tact in TCM con-
nector.
6
CHECK MECHANICAL TROUBLE.
Check mechanical trouble in automatic trans-
mission.
Is there any mechanical trouble in automatic
transmission?
There is mechanical trouble.
Repair or replace
automatic trans-
mission. <Ref. to
AT-32, INSPEC-
TION, Road Test.>
Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
EN(H4SO)-251
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
MEMO:
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