Subaru Legacy III (2000-2003 year). Manual - part 311

EN(H6DO)-46

ENGINE (DIAGNOSTICS)

READ DIAGNOSTIC TROUBLE CODE

11.Read Diagnostic Trouble 

Code

A: OPERATION

1. SUBARU SELECT MONITOR (NORMAL 
MODE)

1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Engine Control System} and
press the [YES] key.
3) Press the [YES] key after displayed the informa-
tion of engine type.
4) On the «Engine Diagnosis» display screen, se-
lect the {Diagnostic Code(s) Display} and press the
[YES] key.
5) On the  «Diagnostic Code(s) Display» display
screen, select the {Current Diagnostic Code(s)} or
{History Diagnostic Code(s)} and press the [YES]
key.

NOTE:
• For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
• For detailed concerning diagnostic trouble
codes, refer to the List of Diagnostic Trouble Code
(DTC).
<Ref. to EN(H6DO)-89, List of Diagnostic Trouble
Code (DTC).>

2. SUBARU SELECT MONITOR (OBD 
MODE)

1) On the «Main Menu» display screen, select the
{2. Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Engine Control System} and
press the [YES] key.
3) Press the [YES] key after displayed the informa-
tion of engine type.
4) On the «Engine Diagnosis» display screen, se-
lect the {OBD System} and press the [YES] key.
5) On the «OBD Menu» display screen, select the
{Diagnosis Code(s) Display} and press the [YES]
key.
6) Make sure that a diagnostic trouble code (DTC)
is shown on the display screen.

NOTE:
• For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
• For detailed concerning diagnostic trouble
codes, refer to the List of Diagnostic Trouble Code
(DTC).

<Ref. to EN(H6DO)-89, List of Diagnostic Trouble
Code (DTC).>

3. OBD-II GENERAL SCAN TOOL

Refers to data denoting emission-related power-
train diagnostic trouble codes.
For details concerning diagnostic trouble codes, re-
fer to the List of Diagnostic Trouble Code (DTC).
<Ref. to EN(H6DO)-89, List of Diagnostic Trouble
Code (DTC).>

NOTE:
Refer to OBD-II general scan tool manufacturer's
instruction manual to access emission-related
powertrain diagnostic trouble codes (MODE $03).

EN(H6DO)-47

ENGINE (DIAGNOSTICS)

INSPECTION MODE

12.Inspection Mode

A: OPERATION

Carry out trouble diagnosis shown in the following DTC table.
When performing trouble diagnosis which is not shown in the DTC table, refer to the next item Drive cycle.
<Ref. to EN(H6DO)-52, Drive Cycle.>

DTC

No.

Item

P0030

HO2S Heater control circuit (Bank 1 Sensor 1)

P0031

HO2S Heater control circuit low (Bank 1 Sensor 1)

P0032

HO2S Heater control circuit high (Bank 1 Sensor 1)

P0037

HO2S Heater control circuit low (Bank 1 Sensor 2)

P0038

HO2S Heater control circuit high (Bank 1 Sensor 2)

P0050

HO2S Heater control circuit (Bank 2 Sensor 1)

P0051

HO2S Heater control circuit low (Bank 2 Sensor 1)

P0052

HO2S Heater control circuit high (Bank 2 Sensor 1)

P0068

Manifold absolute pressure/barometric pressure circuit range/performance

P0107

Manifold absolute pressure/barometric pressure circuit low input

P0108

Manifold absolute pressure/barometric pressure circuit high input

P0112

Intake air temperature circuit low input

P0113

Intake air temperature circuit high input

P0117

Engine coolant temperature circuit low input

P0118

Engine coolant temperature circuit high input

P0122

Throttle/pedal position sensor/switch “A” circuit low input

P0123

Throttle/pedal position sensor/switch “A” circuit high input

P0129

Barometric pressure too low

P0130

O2 sensor circuit (Bank 1 Sensor 1)

P0134

O2 sensor circuit no activity detected (Bank 1 Sensor 1)

P0137

O2 sensor circuit low voltage (Bank 1 Sensor 2)

P0138

O2 sensor circuit high voltage (Bank 1 Sensor 2)

P0150

O2 sensor circuit (Bank 2 Sensor 1)

P0154

O2 sensor circuit no activity detected (Bank 2 Sensor 1)

P0230

Fuel pump primary circuit

P0327

Knock sensor 1 circuit low input (Bank 1 or Single sensor)

P0328

Knock sensor 1 circuit high input (Bank 1 or Single sensor)

P0332

Knock sensor 2 circuit low input (Bank 2)

P0333

Knock sensor 2 circuit high input (Bank 2)

P0335

Crankshaft position sensor “A” circuit

P0336

Crankshaft position sensor “A” circuit range/performance

P0340

Camshaft position sensor “A” circuit (Bank 1 or Single Sensor)

P0341

Camshaft position sensor “A” circuit range/performance (Bank 1 or Single Sensor)

P0458

Evaporative emission control system purge control valve circuit low

P0462

Fuel level sensor circuit low input

P0463

Fuel level sensor circuit high input

P0502

Vehicle speed sensor circuit low input

P0503

Vehicle speed sensor intermittent/erratic/high

P0508

Idle control system circuit low

P0509

Idle control system circuit high

P0512

Starter request circuit

P0519

Idle air control circuit system performace

P0558

Alternator circuit low input

P0559

Alternator circuit high input

P0565

Cruise control on signal

EN(H6DO)-48

ENGINE (DIAGNOSTICS)

INSPECTION MODE

P0604

Internal control module random access memory (RAM) error

P0661

Intake manifold tuning valve control circuit low - bank 1

P0662

Intake manifold tuning valve control circuit high - bank 2

P0691

Cooling fan 1 control circuit low

P0692

Cooling fan 1 control circuit high

P0703

Torque converter/brake switch “B” circuit

P0705

Transmission range sensor circuit (PRNDL input)

P0710

Transmission fluid temperature sensor circuit

P0716

Input/turbine speed sensor circuit range/performance

P0720

Output speed sensor circuit

P0726

Engine speed input circuit range/performance

P0731

Gear 1 incorrect ratio

P0732

Gear 2 incorrect ratio

P0733

Gear 3 incorrect ratio

P0734

Gear 4 incorrect ratio

P0741

Torque converter clutch circuit performance or stuck off

P0743

Torque converter clutch circuit electrical

P0748

Pressure control solenoid “A” electrical

P0753

Shift solenoid “A” electrical

P0758

Shift solenoid “B” electrical

P0771

Shift solenoid “E” performance or stuck off

P0778

Pressure control solenoid “B” electrical

P0785

Shift/timing solenoid

P0851

Neutral switch input circuit low

P0852

Neutral switch input circuit high

P0864

TCM communication circuit range/performance

P0865

TCM communication circuit low

P0866

TCM communication circuit high

P1110

Atmospheric pressure sensor circuit malfunction (low input)

P1111

Atmospheric pressure sensor circuit malfunction (high input)

P1134

A/F sensor micro-computer problem

P1152

O2 sensor circuit range/performance (low) (Bank 1 Sensor 1)

P1153

O2 sensor circuit range/performance (high) (Bank 1 Sensor 2)

P1154

O2 sensor circuit range/performance (low) (Bank 2 Sensor 1)

P1155

O2 sensor circuit range/performance (high) (Bank 2 Sensor 1)

P1518

Starter switch circuit low input

P1560

Back-up voltage circuit malfunction

P1698

Engine torque control cut signal circuit malfunction (low input)

P1699

Engine torque control cut signal circuit malfunction (high input)

P1700

Throttle position sensor circuit malfunction for AT

P1711

Engine torque control signal #1 circuit malfunction

P1712

Engine torque control signal #2 circuit malfunction

DTC

No.

Item

EN(H6DO)-49

ENGINE (DIAGNOSTICS)

INSPECTION MODE

1. PREPARATION FOR THE INSPECTION 
MODE

1) Make sure that fuel remains approx. half amount
[20 to 40 

2

 (5.3 — 10.6 US gal, 4.4 — 8.8 Imp

gal)], and battery voltage is 12V or more.
2) Raise the vehicle using a garage jack and place
on safety stands or drive the vehicle onto free roll-
ers.

WARNING:
• Before raising the vehicle, ensure parking
brakes are applied.
• Do not use a pantograph jack in place of a
safety stand.
• Secure a rope or wire to the front and rear
towing or tie-down hooks to prevent the lateral
runout of front wheels.
• Do not abruptly depress/release clutch pedal
or accelerator pedal during works even when
engine is operating at low speeds since this
may cause vehicle to jump off free rollers.
• In order to prevent the vehicle from slipping
due to vibration, do not place any wooden
blocks or similar items between the safety
stands and the vehicle.
• Since the rear wheels will also rotate, do not
place anything near them. Also, make sure that
nobody goes in front of the vehicle.

3) Warm up engine.

2. SUBARU SELECT MONITOR

1) After performing diagnostics and clearing the
memory, check for any remaining unresolved trou-
ble data. <Ref. to EN(H6DO)-54, Clear Memory
Mode.>
2) Prepare Subaru Select Monitor kit. <Ref. to
EN(H6DO)-9, PREPARATION TOOL, General De-
scription.>

3) Connect diagnosis cable to Subaru Select Mon-
itor.
4) Insert cartridge into Subaru Select Monitor.
<Ref. to EN(H6DO)-9, PREPARATION TOOL,
General Description.>

5) Connect test mode connector at the lower por-
tion of instrument panel (on the driver's side).

6) Connect Subaru Select Monitor to data link con-
nector.

(A) Safety stand

(B) Free rollers

EN-00041

( A )

( B )

(A) Test mode connector

EN-00038

ST

EN-00039

EN-00711

( A )