Subaru Legacy (2005 year). Manual - part 610

5AT(diag)-31

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

13.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Item

Contents of diagnosis

Reference target

P0705

Transmission Range 
Sensor Circuit (PRNDL 
Input)

Inhibitor switch malfunction, open 
or short circuit

<Ref. to 5AT(diag)-35, DTC P0705 TRANS-
MISSION RANGE SENSOR CIRCUIT (PRNDL 
INPUT), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0712

Transmission Fluid Tem-
perature Sensor Circuit 
Low Input

ATF temperature sensor 1 mal-
function, open input signal circuit

<Ref. to 5AT(diag)-39, DTC P0712 TRANS-
MISSION FLUID TEMPERATURE SENSOR 
CIRCUIT LOW INPUT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0713

Transmission Fluid Tem-
perature Sensor Circuit 
High Input

ATF temperature sensor 1 mal-
function, short input signal circuit

<Ref. to 5AT(diag)-42, DTC P0713 TRANS-
MISSION FLUID TEMPERATURE SENSOR 
CIRCUIT HIGH INPUT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0715

Input/Turbine Speed 
Sensor Circuit

Turbine speed sensor 1 malfunc-
tion, short input signal circuit

<Ref. to 5AT(diag)-45, DTC P0715 INPUT/
TURBINE SPEED SENSOR CIRCUIT, Diag-
nostic Procedure with Diagnostic Trouble Code 
(DTC).>

P0719

Torque Converter/Brake 
Switch “B” Circuit Low

Brake switch malfunction, open 
input signal circuit, body inte-
grated module malfunction, CAN 
communication malfunction

<Ref. to 5AT(diag)-48, DTC P0719 TORQUE 
CONVERTER/BRAKE SWITCH “B” CIRCUIT 
LOW, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0720

Output Speed Sensor 
Circuit

Front wheel speed sensor is 
faulty or input signal circuit, 
ground, power supply is open or 
shorted.

<Ref. to 5AT(diag)-50, DTC P0720 OUTPUT 
SPEED SENSOR CIRCUIT, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P0724

Torque Converter/Brake 
Switch “B” Circuit High

Brake switch malfunction, short 
circuit of input signal, body inte-
grated module malfunction, CAN 
communication malfunction

<Ref. to 5AT(diag)-53, DTC P0724 TORQUE 
CONVERTER/BRAKE SWITCH “B” CIRCUIT 
HIGH, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0725

Engine Speed Input Cir-
cuit

Open or short engine speed out-
put signal circuit, ECM malfunc-
tion, CAN communication 
malfunction

<Ref. to 5AT(diag)-55, DTC P0725 ENGINE 
SPEED INPUT CIRCUIT, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P0731

Gear 1 Incorrect Ratio

Vehicle sensor, turbine speed 
sensor, control valve malfunction 
or shift clutch malfunction

<Ref. to 5AT(diag)-55, DTC P0731 GEAR 1 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0732

Gear 2 Incorrect Ratio

Vehicle sensor, turbine speed 
sensor, control valve malfunction 
or shift clutch malfunction

<Ref. to 5AT(diag)-55, DTC P0732 GEAR 2 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0733

Gear 3 Incorrect Ratio

Vehicle sensor, torque converter 
turbine speed sensor or shift 
clutch malfunction

<Ref. to 5AT(diag)-55, DTC P0733 GEAR 3 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0734

Gear 4 Incorrect Ratio

Vehicle sensor, torque converter 
turbine speed sensor or shift 
clutch malfunction

<Ref. to 5AT(diag)-55, DTC P0734 GEAR 4 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0735

Gear 5 Incorrect Ratio

Vehicle sensor, torque converter 
turbine speed sensor or shift 
clutch malfunction

<Ref. to 5AT(diag)-55, DTC P0735 GEAR 5 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0736

Reverse Incorrect Ratio

Vehicle sensor, torque converter 
turbine speed sensor or shift 
clutch malfunction

<Ref. to 5AT(diag)-56, DTC P0736 REVERSE 
INCORRECT RATIO, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0741

Torque Converter Clutch 
Circuit Performance or 
Stuck Off

Lock-up clutch is faulty or valve is 
stuck.

<Ref. to 5AT(diag)-57, DTC P0741 TORQUE 
CONVERTER CLUTCH CIRCUIT PERFOR-
MANCE OR STUCK OFF, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

5AT(diag)-32

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0743

Torque Converter Clutch 
Circuit Electrical

L/U solenoid circuit malfunction 
or L/U solenoid body malfunction

<Ref. to 5AT(diag)-58, DTC P0743 TORQUE 
CONVERTER CLUTCH CIRCUIT ELECTRI-
CAL, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0748

Pressure Control Sole-
noid “A” Electrical

Line pressure solenoid circuit 
malfunction or line pressure sole-
noid body malfunction

<Ref. to 5AT(diag)-60, DTC P0748 PRES-
SURE CONTROL SOLENOID “A” ELECTRI-
CAL, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0751

Shift Solenoid “A” Perfor-
mance or Stuck Off

Shift Solenoid “A” performance 
malfunction

<Ref. to 5AT(diag)-62, DTC P0751 SHIFT 
SOLENOID “A” PERFORMANCE OR STUCK 
OFF, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0753

Shift Solenoid “A” Elec-
trical

Fr/B solenoid circuit malfunction 
or Fr/B solenoid body malfunction

<Ref. to 5AT(diag)-65, DTC P0753 SHIFT 
SOLENOID “A” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0756

Shift Solenoid “B” Perfor-
mance or Stuck Off

Shift Solenoid “B” Performance 
malfunction

<Ref. to 5AT(diag)-67, DTC P0756 SHIFT 
SOLENOID “B” PERFORMANCE OR STUCK 
OFF, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0758

Shift Solenoid “B” Elec-
trical

I/C solenoid circuit malfunction or 
I/C solenoid body malfunction

<Ref. to 5AT(diag)-70, DTC P0758 SHIFT 
SOLENOID “B” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0761

Shift Solenoid “C” Perfor-
mance or Stuck Off

H&LR/C solenoid malfunction

<Ref. to 5AT(diag)-72, DTC P0761 SHIFT 
SOLENOID “C” PERFORMANCE OR STUCK 
OFF, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0763

Shift Solenoid “C” Elec-
trical

H&LR/C solenoid circuit malfunc-
tion or H&LR/C solenoid body 
malfunction

<Ref. to 5AT(diag)-75, DTC P0763 SHIFT 
SOLENOID “C” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0766

Shift Solenoid “D” Perfor-
mance or Stuck Off

D/C solenoid malfunction

<Ref. to 5AT(diag)-77, DTC P0766 SHIFT 
SOLENOID “D” PERFORMANCE OR STUCK 
OFF, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0768

Shift Solenoid “D” Elec-
trical

D/C solenoid circuit malfunction 
or D/C solenoid body malfunction

<Ref. to 5AT(diag)-80, DTC P0768 SHIFT 
SOLENOID “D” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0771

Shift Solenoid “E” Perfor-
mance or Stuck Off

LC/B solenoid malfunction

<Ref. to 5AT(diag)-82, DTC P0771 SHIFT 
SOLENOID “E” PERFORMANCE OR STUCK 
OFF, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0773

Shift Solenoid “E” Elec-
trical

• LC/B solenoid circuit malfunc-
tion or LC/B solenoid body mal-
function
• OFF malfunction of PVIGN 
relay circuit or relay body

<Ref. to 5AT(diag)-85, DTC P0773 SHIFT 
SOLENOID “E” ELECTRICAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0801

Reverse Inhibit Control 
Circuit

• Shift lock solenoid is faulty or 
output signal circuit is open or 
shorted.
• Blown out of TCM+B fuse

<Ref. to 5AT(diag)-88, DTC P0801 REVERSE 
INHIBIT CONTROL CIRCUIT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0817

Starter Disable Circuit

• PN signal output circuit is open 
or shorted.
• ECM Source Voltage Is Abnor-
mal
• Blown out of TCM+B fuse

<Ref. to 5AT(diag)-91, DTC P0817 STARTER 
DISABLE CIRCUIT, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

P0882

TCM Power Input Signal 
Low

PVIGN relay output circuit is 
open, shorted or relay malfunc-
tion

<Ref. to 5AT(diag)-93, DTC P0882 TCM 
POWER INPUT SIGNAL LOW, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

DTC

Item

Contents of diagnosis

Reference target

5AT(diag)-33

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0957

Backup Light Relay Cir-
cuit Low

Back-up relay output circuit is 
open, shorted or relay OFF mal-
function

<Ref. to 5AT(diag)-95, DTC P0957 BACKUP 
LIGHT RELAY CIRCUIT LOW, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0958

Backup Light Relay Cir-
cuit High

Back-up relay output circuit is 
open, shorted or relay ON mal-
function

<Ref. to 5AT(diag)-97, DTC P0958 BACKUP 
LIGHT RELAY CIRCUIT HIGH, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P1601

TCM Data Communica-
tion Failure

Communication Failure between 
TCM and Memory Box

<Ref. to 5AT(diag)-99, DTC P1601 TCM DATA 
COMMUNICATION FAILURE, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P1706

AT Vehicle Speed Sen-
sor Circuit Malfunction 
(Rear Wheel)

Rear wheel speed sensor is faulty 
or input circuit, ground, power 
supply is open or shorted.

<Ref. to 5AT(diag)-101, DTC P1706 AT VEHI-
CLE SPEED SENSOR CIRCUIT MALFUNC-
TION (REAR WHEEL), Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P1707

AT AWD Solenoid Valve 
Circuit Malfunction

AWD solenoid circuit malfunction 
or AWD solenoid body malfunc-
tion

<Ref. to 5AT(diag)-104, DTC P1707 AT AWD 
SOLENOID VALVE CIRCUIT MALFUNCTION, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P1710

Torque Converter Tur-
bine 2 Speed Signal Cir-
cuit 2 Malfunction

Torque converter sensor 2 mal-
function, input circuit, ground, 
power open, short circuit

<Ref. to 5AT(diag)-106, DTC P1710 TORQUE 
CONVERTER TURBINE 2 SPEED SIGNAL 
CIRCUIT 2 MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P1716

ATF Temp. Sensor 2 Cir-
cuit Low

ATF temperature sensor 2 mal-
function, open input signal circuit

<Ref. to 5AT(diag)-109, DTC P1716 ATF TEMP. 
SENSOR 2 CIRCUIT LOW, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P1717

ATF Temp. Sensor 2 Cir-
cuit High

ATF temperature sensor 2 mal-
function, short input signal circuit

<Ref. to 5AT(diag)-112, DTC P1717 ATF TEMP. 
SENSOR 2 CIRCUIT HIGH, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P1718

AT CAN Communication 
Circuit

CAN communication line bus off 
is open, EUM short circuit, ABS/
VDCCM, integrated CU malfunc-
tion

<Ref. to 5AT(diag)-114, DTC P1718 AT CAN 
COMMUNICATION CIRCUIT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P1760

Lateral Acceleration 
Sensor Performance 
Problem

Lateral G sensor malfunction

<Ref. to 5AT(diag)-115, DTC P1760 LATERAL 
ACCELERATION SENSOR PERFORMANCE 
PROBLEM, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

P1761

Lateral Acceleration 
Sensor Circuit Low

Lateral G sensor is faulty, input 
signal circuit is open or CAN 
communication is malfunction.

<Ref. to 5AT(diag)-118, DTC P1761 LATERAL 
ACCELERATION SENSOR CIRCUIT LOW, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P1762

Lateral Acceleration 
Sensor Circuit High

Lateral G sensor is faulty or input 
signal circuit is shorted.

<Ref. to 5AT(diag)-121, DTC P1762 LATERAL 
ACCELERATION SENSOR CIRCUIT HIGH, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P1798

Gear 1 Engine Brake

Malfunction of clutch oil pressure 
related to 1st engine brake, sole-
noid current malfunction

<Ref. to 5AT(diag)-123, DTC P1798 GEAR 1 
ENGINE BRAKE, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

P1799

Interlock

Malfunction of clutch oil pressure 
which emit interlock, solenoid 
current malfunction

<Ref. to 5AT(diag)-124, DTC P1799 INTER-
LOCK, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P1817

SPORT Mode Switch 
Circuit (Manual Switch)

SPORT mode and manual mode 
switch is open or shorted, or 
switch malfunction

<Ref. to 5AT(diag)-125, DTC P1817 SPORT 
MODE SWITCH CIRCUIT (MANUAL 
SWITCH), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P1840

Transmission Fluid Pres-
sure Sensor/Switch A 
Circuit

Fr/B oil pressure switch is open or 
shorted, or switch malfunction

<Ref. to 5AT(diag)-127, DTC P1840 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH A CIRCUIT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

DTC

Item

Contents of diagnosis

Reference target

5AT(diag)-34

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P1842

Transmission Fluid Pres-
sure Sensor/Switch C 
Circuit

I/C oil pressure switch is open or 
shorted, or switch malfunction

<Ref. to 5AT(diag)-127, DTC P1842 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH C CIRCUIT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P1843

Transmission Fluid Pres-
sure Sensor/Switch D 
Circuit

D/C oil pressure switch is open or 
shorted, or switch malfunction

<Ref. to 5AT(diag)-127, DTC P1843 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH D CIRCUIT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P1844

Transmission Fluid Pres-
sure Sensor/Switch E 
Circuit

H&LR/C oil pressure switch is 
open or shorted, or switch mal-
function

<Ref. to 5AT(diag)-127, DTC P1844 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH E CIRCUIT, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

DTC

Item

Contents of diagnosis

Reference target