Subaru Legacy (2005 year). Manual — part 323

EN(H4DOTC)(diag)-61

ENGINE (DIAGNOSTICS)

Diagnostics for Engine Starting Failure

Step

Check

Yes

No

1

CHECK OPERATION OF EACH FUEL INJEC-
TOR.
While cranking the engine, check each fuel
injector emits operating sound. Use a sound
scope or attach a screwdriver to the injector for
this check.

Does the fuel injector emit
operating sound?

Check the fuel
pressure. <Ref. to
ME(H4DOTC)-27,
INSPECTION,
Fuel Pressure.>

Go to step 2.

2

CHECK POWER SUPPLY TO EACH FUEL
INJECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from fuel injector.
3) Turn the ignition switch to ON.
4) Measure the power supply voltage between
fuel injector terminal and engine ground.

Connector & terminal

#1 (E5) No. 2 (+) — Engine ground (

−

):

#2 (E16) No. 2 (+) — Engine ground (

−

):

#3 (E6) No. 2 (+) — Engine ground (

−

):

#4 (E17) No. 2 (+) — Engine ground (

−

):

Is the voltage more than 10 V? Go to step 3.

Repair the har-
ness and connec-
tor.

NOTE:
In this case, repair
the following:
• Open circuit of
harness between
main relay and fuel
injector connector
• Poor contact in
main relay connec-
tor
• Poor contact in
coupling connector
• Poor contact in
fuel injector con-
nector

3

CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
1) Disconnect the connector from ECM.
2) Measure the resistance of harness
between ECM and fuel injector connector.

Connector & terminal

(B136) No. 6 — (E5) No. 1:
(B136) No. 5 — (E16) No. 1:
(B136) No. 4 — (E6) No. 1:
(B136) No. 3 — (E17) No. 1:

Is the resistance less than 1
Ω?

Go to step 4.

Repair the har-
ness and connec-
tor.

NOTE:
In this case, repair
the following:
• Open circuit of
harness between
ECM and fuel
injector connector
• Poor contact in
coupling connector

4

CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
Measure the resistance of harness between
ECM and chassis ground.

Connector & terminal

(B136) No. 6 — Chassis ground:
(B136) No. 5 — Chassis ground:
(B136) No. 4 — Chassis ground:
(B136) No. 3 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 5.

Repair the ground
short circuit of har-
ness between
ECM and fuel
injector connector.

5

CHECK EACH FUEL INJECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between each fuel
injector terminals.

Terminals

No. 1 — No. 2:

Is the resistance 5 — 20

Ω?

Go to step 6.

Replace the faulty
fuel injector.

6

CHECK POOR CONTACT.
Check poor contact in ECM connector.

Is there poor contact in ECM
connector?

Repair the poor
contact in ECM
connector.

Inspection using
“General Diagnos-
tic Table”. <Ref. to
EN(H4DOTC)(diag
)-213, INSPEC-
TION, General
Diagnostic Table.>

EN(H4DOTC)(diag)-62

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

17.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Item

Reference

P0031

HO2S Heater Control Circuit Low
(Bank 1 Sensor 1)

<Ref. to EN(H4DOTC)(diag)-67, DTC P0031 HO2S HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0032

HO2S Heater Control Circuit High
(Bank 1 Sensor 1)

<Ref. to EN(H4DOTC)(diag)-69, DTC P0032 HO2S HEATER CONTROL
CIRCUIT HIGH (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0037

HO2S Heater Control Circuit Low
(Bank 1 Sensor 2)

<Ref. to EN(H4DOTC)(diag)-71, DTC P0037 HO2S HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0038

HO2S Heater Control Circuit High
(Bank 1 Sensor 2)

<Ref. to EN(H4DOTC)(diag)-74, DTC P0038 HO2S HEATER CONTROL
CIRCUIT HIGH (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0102

Mass or Volume Air Flow Circuit
Low Input

<Ref. to EN(H4DOTC)(diag)-76, DTC P0102 MASS OR VOLUME AIR
FLOW CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0103

Mass or Volume Air Flow Circuit
High Input

<Ref. to EN(H4DOTC)(diag)-79, DTC P0103 MASS OR VOLUME AIR
FLOW CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0107

Manifold Absolute Pressure/Baro-
metric Pressure Circuit Low Input

<Ref. to EN(H4DOTC)(diag)-81, DTC P0107 MANIFOLD ABSOLUTE
PRESSURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>

P0108

Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input

<Ref. to EN(H4DOTC)(diag)-83, DTC P0108 MANIFOLD ABSOLUTE
PRESSURE/BAROMETRIC PRESSURE CIRCUIT HIGH INPUT, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>

P0112

Intake Air Temperature Sensor 1
Circuit Low

<Ref. to EN(H4DOTC)(diag)-85, DTC P0112 INTAKE AIR TEMPERATURE
SENSOR 1 CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0113

Intake Air Temperature Sensor 1
Circuit High

<Ref. to EN(H4DOTC)(diag)-87, DTC P0113 INTAKE AIR TEMPERATURE
SENSOR 1 CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0117

Engine Coolant Temperature Cir-
cuit Low

<Ref. to EN(H4DOTC)(diag)-90, DTC P0117 ENGINE COOLANT TEMPER-
ATURE CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0118

Engine Coolant Temperature Cir-
cuit High

<Ref. to EN(H4DOTC)(diag)-92, DTC P0118 ENGINE COOLANT TEMPER-
ATURE CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0122

Throttle/Pedal Position Sensor/
Switch “A” Circuit Low

<Ref. to EN(H4DOTC)(diag)-95, DTC P0122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT LOW, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0123

Throttle/Pedal Position Sensor/
Switch “A” Circuit High

<Ref. to EN(H4DOTC)(diag)-97, DTC P0123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT HIGH, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0131

O2 Sensor Circuit Low Voltage
(Bank 1 Sensor 1)

<Ref. to EN(H4DOTC)(diag)-99, DTC P0131 O2 SENSOR CIRCUIT LOW
VOLTAGE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0132

O2 Sensor Circuit High Voltage
(Bank 1 Sensor 1)

<Ref. to EN(H4DOTC)(diag)-101, DTC P0132 O2 SENSOR CIRCUIT HIGH
VOLTAGE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0134

O2 Sensor Circuit No Activity
Detected (Bank 1 Sensor 1)

<Ref. to EN(H4DOTC)(diag)-103, DTC P0134 O2 SENSOR CIRCUIT NO
ACTIVITY DETECTED (BANK 1 SENSOR 1), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P0137

O2 Sensor Circuit Low Voltage
(Bank 1 Sensor 2)

<Ref. to EN(H4DOTC)(diag)-105, DTC P0137 O2 SENSOR CIRCUIT LOW
VOLTAGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

EN(H4DOTC)(diag)-63

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0138

O2 Sensor Circuit High Voltage
(Bank 1 Sensor 2)

<Ref. to EN(H4DOTC)(diag)-108, DTC P0138 O2 SENSOR CIRCUIT HIGH
VOLTAGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0171

System Too Lean (Bank 1)

<Ref. to EN(H4DOTC)(diag)-110, DTC P0171 SYSTEM TOO LEAN (BANK
1), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0172

System Too Rich (Bank 1)

<Ref. to EN(H4DOTC)(diag)-111, DTC P0172 SYSTEM TOO RICH (BANK
1), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0222

Throttle/Pedal Position Sensor/
Switch “B” Circuit Low

<Ref. to EN(H4DOTC)(diag)-114, DTC P0222 THROTTLE/PEDAL POSI-
TION SENSOR/SWITCH “B” CIRCUIT LOW, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P0223

Throttle/Pedal Position Sensor/
Switch “B” Circuit High

<Ref. to EN(H4DOTC)(diag)-116, DTC P0223 THROTTLE/PEDAL POSI-
TION SENSOR/SWITCH “B” CIRCUIT HIGH, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P0230

Fuel Pump Primary Circuit

<Ref. to EN(H4DOTC)(diag)-118, DTC P0230 FUEL PUMP PRIMARY CIR-
CUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0245

Turbo/Super Charger Wastegate
Solenoid “A” Low

<Ref. to EN(H4DOTC)(diag)-121, DTC P0245 TURBO/SUPER CHARGER
WASTEGATE SOLENOID “A” LOW, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0246

Turbo/Super Charger Wastegate
Solenoid “A” High

<Ref. to EN(H4DOTC)(diag)-123, DTC P0246 TURBO/SUPER CHARGER
WASTEGATE SOLENOID “A” HIGH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

P0261

Cylinder 1 Injector Circuit Low

<Ref. to EN(H4DOTC)(diag)-125, DTC P0261 CYLINDER 1 INJECTOR
CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0264

Cylinder 2 Injector Circuit Low

<Ref. to EN(H4DOTC)(diag)-125, DTC P0264 CYLINDER 2 INJECTOR
CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0267

Cylinder 3 Injector Circuit Low

<Ref. to EN(H4DOTC)(diag)-125, DTC P0267 CYLINDER 3 INJECTOR
CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0270

Cylinder 4 Injector Circuit Low

<Ref. to EN(H4DOTC)(diag)-125, DTC P0270 CYLINDER 4 INJECTOR
CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0327

Knock Sensor 1 Circuit Low (Bank
1 or Single Sensor)

<Ref. to EN(H4DOTC)(diag)-128, DTC P0327 KNOCK SENSOR 1 CIRCUIT
LOW (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0328

Knock Sensor 1 Circuit High (Bank
1 or Single Sensor)

<Ref. to EN(H4DOTC)(diag)-130, DTC P0328 KNOCK SENSOR 1 CIRCUIT
HIGH (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0335

Crankshaft Position Sensor “A” Cir-
cuit

<Ref. to EN(H4DOTC)(diag)-132, DTC P0335 CRANKSHAFT POSITION
SENSOR “A” CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0340

Camshaft Position Sensor “A” Cir-
cuit (Bank 1 or Single Sensor)

<Ref. to EN(H4DOTC)(diag)-134, DTC P0340 CAMSHAFT POSITION SEN-
SOR “A” CIRCUIT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

P0345

Camshaft Position Sensor “A” Cir-
cuit (Bank 2)

<Ref. to EN(H4DOTC)(diag)-136, DTC P0345 CAMSHAFT POSITION SEN-
SOR “A” CIRCUIT (BANK 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0350

Ignition Coil Primary/Secondary
Circuit

<Ref. to EN(H4DOTC)(diag)-138, DTC P0350 IGNITION COIL PRIMARY/
SECONDARY CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0365

Camshaft Position Sensor “B” Cir-
cuit (Bank 1)

<Ref. to EN(H4DOTC)(diag)-141, DTC P0365 CAMSHAFT POSITION SEN-
SOR “B” CIRCUIT (BANK 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0390

Camshaft Position Sensor “B” Cir-
cuit (Bank 2)

<Ref. to EN(H4DOTC)(diag)-143, DTC P0390 CAMSHAFT POSITION SEN-
SOR “B” CIRCUIT (BANK 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0458

Evaporative Emission System
Purge Control Valve Circuit Low

<Ref. to EN(H4DOTC)(diag)-145, DTC P0458 EVAPORATIVE EMISSION
SYSTEM PURGE CONTROL VALVE CIRCUIT LOW, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

DTC

Item

Reference

EN(H4DOTC)(diag)-64

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0459

Evaporative Emission System
Purge Control Valve Circuit High

<Ref. to EN(H4DOTC)(diag)-147, DTC P0459 EVAPORATIVE EMISSION
SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

P0500

Vehicle Speed Sensor “A”

<Ref. to EN(H4DOTC)(diag)-148, DTC P0500 VEHICLE SPEED SENSOR
“A”, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0512

Starter Request Circuit

<Ref. to EN(H4DOTC)(diag)-149, DTC P0512 STARTER REQUEST CIR-
CUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0513

Incorrect Immobilizer Key

<Ref. to IM(diag)-17, DTC P0513 INCORRECT IMMOBILIZER KEY, Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

P0519

Idle Air Control System Perfor-
mance

<Ref. to EN(H4DOTC)(diag)-150, DTC P0519 IDLE AIR CONTROL SYS-
TEM PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0562

System Voltage Low

<Ref. to EN(H4DOTC)(diag)-151, DTC P0562 SYSTEM VOLTAGE LOW,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0563

System Voltage High

<Ref. to EN(H4DOTC)(diag)-153, DTC P0563 SYSTEM VOLTAGE HIGH,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0600

Serial Communication Link

<Ref. to EN(H4DOTC)(diag)-155, DTC P0600 SERIAL COMMUNICATION
LINK, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0604

Internal Control Module Random
Access Memory (RAM) Error

<Ref. to EN(H4DOTC)(diag)-155, DTC P0604 INTERNAL CONTROL MOD-
ULE RANDOM ACCESS MEMORY (RAM) ERROR, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

P0605

Internal Control Module Read Only
Memory (ROM) Error

<Ref. to EN(H4DOTC)(diag)-155, DTC P0605 INTERNAL CONTROL MOD-
ULE READ ONLY MEMORY (ROM) ERROR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P0607

Control Module Performance

<Ref. to EN(H4DOTC)(diag)-155, DTC P0607 CONTROL MODULE PER-
FORMANCE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0638

Throttle Actuator Control Range/
Performance (Bank 1)

<Ref. to EN(H4DOTC)(diag)-157, DTC P0638 THROTTLE ACTUATOR
CONTROL RANGE/PERFORMANCE (BANK 1), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P0700

Transmission Control System (MIL
Request)

<Ref. to EN(H4DOTC)(diag)-157, DTC P0700 TRANSMISSION CONTROL
SYSTEM (MIL REQUEST), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

P0851

Park/Neutral Switch Input Circuit
Low

<Ref. to EN(H4DOTC)(diag)-158, DTC P0851 PARK/NEUTRAL SWITCH
INPUT CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P0852

Park/Neutral Switch Input Circuit
High

<Ref. to EN(H4DOTC)(diag)-161, DTC P0852 PARK/NEUTRAL SWITCH
INPUT CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P1160

Return Spring Failure

<Ref. to EN(H4DOTC)(diag)-163, DTC P1160 RETURN SPRING FAILURE,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P1518

Starter Switch Circuit Low Input

<Ref. to EN(H4DOTC)(diag)-164, DTC P1518 STARTER SWITCH CIRCUIT
LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P1560

Back-up Voltage Circuit Malfunc-
tion

<Ref. to EN(H4DOTC)(diag)-166, DTC P1560 BACK-UP VOLTAGE CIR-
CUIT MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P1570

Antenna

<Ref. to IM(diag)-18, DTC P1570 ANTENNA, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

P1571

Reference Code Incompatibility

<Ref. to IM(diag)-20, DTC P1571 REFERENCE CODE INCOMPATIBILITY,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P1572

IMM Circuit Failure (Except
Antenna Circuit)

<Ref. to IM(diag)-21, DTC P1572 IMM CIRCUIT FAILURE (EXCEPT
ANTENNA CIRCUIT), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

P1574

Key Communication Failure

<Ref. to IM(diag)-24, DTC P1574 KEY COMMUNICATION FAILURE, Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

P1576

EGI Control Module EEPROM

<Ref. to IM(diag)-25, DTC P1576 EGI CONTROL MODULE EEPROM, Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

DTC

Item

Reference