Subaru Legacy III (2000-2003 year). 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).>

Go to step 2.

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.

Go to step 3.

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.

Go to step 4.

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.

Go to step 5.

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.

Go to step 6.

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: