Subaru Legacy (2005 year). Manual - part 438

EN(H6DO)(diag)-65

ENGINE (DIAGNOSTICS)

Diagnostics for Engine Starting Failure

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 (

−

):

#5 (E43) No. 2 (+) — Engine ground (

−

):

#6 (E44) 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

#1 (B136) No. 6 — (E5) No. 1:
#2 (B136) No. 5 — (E16) No. 1:
#3 (B136) No. 4 — (E6) No. 1:
#4 (B136) No. 3 — (E17) No. 1:
#5 (B136) No. 2 — (E43) No. 1:
#6 (B136) No. 1 — (E44) 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 fuel injector connector.

Connector & terminal

#1 (B136) No. 6 — Chassis ground:
#2 (B136) No. 5 — Chassis ground:
#3 (B136) No. 4 — Chassis ground:
#4 (B136) No. 3 — Chassis ground:
#5 (B136) No. 2 — Chassis ground:
#6 (B136) No. 1 — 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.

Terminal

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(H6DO)(diag)-
269, INSPEC-
TION, General 
Diagnostic Table.>

Step

Check

Yes

No

EN(H6DO)(diag)-66

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

17.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Item

Reference

P0011

Intake Camshaft Position-Timing 
Over-Advanced or System perfor-
mance (Bank 1)

<Ref. to EN(H6DO)(diag)-72, DTC P0011 INTAKE CAMSHAFT POSITION-
TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK1), Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

P0021

Intake Camshaft Position-Timing 
Over-Advanced or System perfor-
mance (Bank 2)

<Ref. to EN(H6DO)(diag)-73, DTC P0021 INTAKE CAMSHAFT POSITION-
TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK2), Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

P0026

Intake Valve Control Solenoid Circuit 
Range/performance (Bank 1)

<Ref. to EN(H6DO)(diag)-74, DTC P0026 INTAKE VALVE CONTROL SOLE-
NOID CIRCUIT RANGE/PERFORMANCE (BANK 1), Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0028

Intake Valve Control Solenoid Circuit 
Range/performance (Bank 2)

<Ref. to EN(H6DO)(diag)-76, DTC P0028 INTAKE VALVE CONTROL SOLE-
NOID CIRCUIT RANGE/PERFORMANCE (BANK 2), Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

P0030

HO2S Heater Control Circuit (Bank 1 
Sensor 1)

<Ref. to EN(H6DO)(diag)-78, DTC P0030 HO2S HEATER CONTROL CIR-
CUIT (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P0031

HO2S Heater Control Circuit Low 
(Bank 1 Sensor 1)

<Ref. to EN(H6DO)(diag)-80, DTC P0031 HO2S HEATER CONTROL CIR-
CUIT 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(H6DO)(diag)-83, DTC P0032 HO2S HEATER CONTROL CIR-
CUIT 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(H6DO)(diag)-85, DTC P0037 HO2S HEATER CONTROL CIR-
CUIT 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(H6DO)(diag)-88, DTC P0038 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0050

HO2S Heater Control Circuit (Bank 2 
Sensor 1)

<Ref. to EN(H6DO)(diag)-90, DTC P0050 HO2S HEATER CONTROL CIR-
CUIT (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P0051

HO2S Heater Control Circuit Low 
(Bank 2 Sensor 1)

<Ref. to EN(H6DO)(diag)-92, DTC P0051 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0052

HO2S Heater Control Circuit High 
(Bank 2 Sensor 1)

<Ref. to EN(H6DO)(diag)-95, DTC P0052 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0057

HO2S Heater Control Circuit Low 
(Bank 2 Sensor 2)

<Ref. to EN(H6DO)(diag)-97, DTC P0057 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0058

HO2S Heater Control Circuit High 
(Bank 2 Sensor 2)

<Ref. to EN(H6DO)(diag)-100, DTC P0058 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0076

Intake Valve Control Solenoid Circuit 
Low (Bank 1)

<Ref. to EN(H6DO)(diag)-102, DTC P0076 INTAKE VALVE CONTROL 
SOLENOID CIRCUIT LOW (BANK 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0077

Intake Valve Control Solenoid Circuit 
High (Bank 1)

<Ref. to EN(H6DO)(diag)-104, DTC P0077 INTAKE VALVE CONTROL 
SOLENOID CIRCUIT HIGH (BANK 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0082

Intake Valve Control Solenoid Circuit 
Low (Bank 2)

<Ref. to EN(H6DO)(diag)-106, DTC P0082 INTAKE VALVE CONTROL 
SOLENOID CIRCUIT LOW (BANK 2), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0083

Intake Valve Control Solenoid Circuit 
High (Bank 2)

<Ref. to EN(H6DO)(diag)-108, DTC P0083 INTAKE VALVE CONTROL 
SOLENOID CIRCUIT HIGH (BANK 2), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

EN(H6DO)(diag)-67

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0101

Mass or Volume Air Flow Circuit 
Range/Performance

<Ref. to EN(H6DO)(diag)-110, DTC P0101 MASS OR VOLUME AIR FLOW 
CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0102

Mass or Volume Air Flow Circuit Low 
Input

<Ref. to EN(H6DO)(diag)-112, 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(H6DO)(diag)-115, 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(H6DO)(diag)-117, DTC P0107 MANIFOLD ABSOLUTE PRES-
SURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0108

Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input

<Ref. to EN(H6DO)(diag)-120, DTC P0108 MANIFOLD ABSOLUTE PRES-
SURE/BAROMETRIC PRESSURE CIRCUIT HIGH INPUT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

P0112

Intake Air Temperature Sensor 1 Cir-
cuit Low

<Ref. to EN(H6DO)(diag)-123, DTC P0112 INTAKE AIR TEMPERATURE 
SENSOR 1 CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P0113

Intake Air Temperature Sensor 1 Cir-
cuit High

<Ref. to EN(H6DO)(diag)-125, DTC P0113 INTAKE AIR TEMPERATURE 
SENSOR 1 CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

P0117

Engine Coolant Temperature Circuit 
Low

<Ref. to EN(H6DO)(diag)-128, DTC P0117 ENGINE COOLANT TEMPERA-
TURE CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code 
(DTC).>

P0118

Engine Coolant Temperature Circuit 
High

<Ref. to EN(H6DO)(diag)-130, DTC P0118 ENGINE COOLANT TEMPERA-
TURE CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code 
(DTC).>

P0122

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

<Ref. to EN(H6DO)(diag)-133, 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(H6DO)(diag)-135, DTC P0123 THROTTLE/PEDAL POSITION 
SENSOR/SWITCH “A” CIRCUIT HIGH, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0125

Insufficient Coolant Temperature for 
Closed Loop Fuel Control

<Ref. to EN(H6DO)(diag)-137, DTC P0125 INSUFFICIENT COOLANT 
TEMPERATURE FOR CLOSED LOOP FUEL CONTROL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

P0131

O2 Sensor Circuit Low Voltage (Bank 
1 Sensor 1)

<Ref. to EN(H6DO)(diag)-138, 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(H6DO)(diag)-140, DTC P0132 O2 SENSOR CIRCUIT HIGH 
VOLTAGE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0133

O2 Sensor Circuit Slow Response 
(Bank 1 Sensor 1)

<Ref. to EN(H6DO)(diag)-142, DTC P0133 O2 SENSOR CIRCUIT SLOW 
RESPONSE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0134

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

<Ref. to EN(H6DO)(diag)-143, 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(H6DO)(diag)-146, DTC P0137 O2 SENSOR CIRCUIT LOW 
VOLTAGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0138

O2 Sensor Circuit High Voltage 
(Bank 1 Sensor 2)

<Ref. to EN(H6DO)(diag)-149, DTC P0138 O2 SENSOR CIRCUIT HIGH 
VOLTAGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0151

O2 Sensor Circuit Low Voltage (Bank 
2 Sensor 1)

<Ref. to EN(H6DO)(diag)-152, DTC P0151 O2 SENSOR CIRCUIT LOW 
VOLTAGE (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

DTC

Item

Reference

EN(H6DO)(diag)-68

ENGINE (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

P0152

O2 Sensor Circuit High Voltage 
(Bank 2 Sensor 1)

<Ref. to EN(H6DO)(diag)-154, DTC P0152 O2 SENSOR CIRCUIT HIGH 
VOLTAGE (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0153

O2 Sensor Circuit Slow Response 
(Bank 2 Sensor 1)

<Ref. to EN(H6DO)(diag)-156, DTC P0153 O2 SENSOR CIRCUIT SLOW 
RESPONSE (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

P0154

O2 Sensor Circuit No Activity 
Detected (Bank 2 Sensor 1)

<Ref. to EN(H6DO)(diag)-157, DTC P0154 O2 SENSOR CIRCUIT NO 
ACTIVITY DETECTED (BANK 2 SENSOR 1), Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

P0157

O2 Sensor Circuit Low Voltage (Bank 
2 Sensor 2)

<Ref. to EN(H6DO)(diag)-160, DTC P0157 O2 SENSOR CIRCUIT LOW 
VOLTAGE (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0158

O2 Sensor Circuit High Voltage 
(Bank 2 Sensor 2)

<Ref. to EN(H6DO)(diag)-163, DTC P0158 O2 SENSOR CIRCUIT HIGH 
VOLTAGE (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

P0171

System Too Lean (Bank 1)

<Ref. to EN(H6DO)(diag)-165, DTC P0171 SYSTEM TOO LEAN (BANK 1), 
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0172

System Too Rich (Bank 1)

<Ref. to EN(H6DO)(diag)-165, DTC P0172 SYSTEM TOO RICH (BANK 1), 
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0174

System Too Lean (Bank 2)

<Ref. to EN(H6DO)(diag)-165, DTC P0174 SYSTEM TOO LEAN (BANK 2), 
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0175

System Too Rich (Bank 2)

<Ref. to EN(H6DO)(diag)-166, DTC P0175 SYSTEM TOO RICH (BANK 2), 
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0197

Engine Oil Temperature Sensor Low

<Ref. to EN(H6DO)(diag)-168, DTC P0197 ENGINE OIL TEMPERATURE 
SENSOR LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0198

Engine Oil Temperature Sensor High

<Ref. to EN(H6DO)(diag)-170, DTC P0198 ENGINE OIL TEMPERATURE 
SENSOR HIGH, Diagnostic Procedure with Diagnostic Trouble Code 
(DTC).>

P0222

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

<Ref. to EN(H6DO)(diag)-172, DTC P0222 THROTTLE/PEDAL POSITION 
SENSOR/SWITCH “B” CIRCUIT LOW, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0223

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

<Ref. to EN(H6DO)(diag)-174, DTC P0223 THROTTLE/PEDAL POSITION 
SENSOR/SWITCH “B” CIRCUIT HIGH, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0230

Fuel Pump Primary Circuit

<Ref. to EN(H6DO)(diag)-176, DTC P0230 FUEL PUMP PRIMARY CIR-
CUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0301

Cylinder 1 Misfire Detected

<Ref. to EN(H6DO)(diag)-179, DTC P0301 CYLINDER 1 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0302

Cylinder 2 Misfire Detected

<Ref. to EN(H6DO)(diag)-179, DTC P0302 CYLINDER 2 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0303

Cylinder 3 Misfire Detected

<Ref. to EN(H6DO)(diag)-179, DTC P0303 CYLINDER 3 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0304

Cylinder 4 Misfire Detected

<Ref. to EN(H6DO)(diag)-179, DTC P0304 CYLINDER 4 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0305

Cylinder 5 Misfire Detected

<Ref. to EN(H6DO)(diag)-179, DTC P0305 CYLINDER 5 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0306

Cylinder 6 Misfire Detected

<Ref. to EN(H6DO)(diag)-180, DTC P0306 CYLINDER 6 MISFIRE 
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

P0327

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

<Ref. to EN(H6DO)(diag)-186, 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(H6DO)(diag)-188, DTC P0328 KNOCK SENSOR 1 CIRCUIT 
HIGH (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

P0332

Knock Sensor 2 Circuit Low (Bank 2)

<Ref. to EN(H6DO)(diag)-190, DTC P0332 KNOCK SENSOR 2 CIRCUIT 
LOW (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

DTC

Item

Reference