Nissan Pathfinder (2010 year). Manual - part 252

EC-108

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER

Refer to 

EC-108, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 7.

6.

CHECK INTERMITTENT INCIDENT

Perform 

GI-37, "Intermittent Incident"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace.

7.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1.

CAUTION:

• Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m

(19.7 in) onto a hard surface such as a concrete floor; use a new one.

• Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads using Heated Oxygen

Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

>>

INSPECTION END

Component Inspection

INFOID:0000000005257076

AIR FUEL RATIO (A/F) SENSOR 1 HEATER

1. Check resistance between A/F sensor 1 terminals as follows.

2. If NG, replace air fuel ratio (A/F) sensor 1.

CAUTION:

• Discard any A/F sensor which has been dropped from a

height of more than 0.5 m (19.7 in) onto a hard surface such

as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system

threads using Heated Oxygen Sensor Thread Cleaner tool J-

43897-18 or J-43897-12 and approved anti-seize lubricant.

Terminal No.

Resistance

3 and 4

1.80 - 2.44 

Ω

 [at 25

°

C (77

°

F)]

3 and 1, 2

∞

 

Ω

(Continuity should not exist)

4 and 1, 2

PBIB3309E

2010 Pathfinder

P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-109

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

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EC

N

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P0037, P0038, P0057, P0058 HO2S2 HEATER

Description

INFOID:0000000005257077

SYSTEM DESCRIPTION

The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,

amount of intake air and engine coolant temperature. 

OPERATION

On Board Diagnosis Logic

INFOID:0000000005257078

DTC Confirmation Procedure

INFOID:0000000005257079

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at

idle.

 WITH CONSULT-III

1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.

Sensor

Input signal to ECM

ECM function

Actuator

Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)

Engine speed

Heated oxygen sensor 2 
heater control

Heated oxygen sensor 2 heater

Engine coolant temperature sensor

Engine coolant temperature

Mass air flow sensor

Amount of intake air

Engine speed rpm

Heated oxygen sensor 2 heater

Above 3,600

OFF

Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1 

minute and at idle for 1 minute under no load

ON

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0037
0037
(Bank 1)

Heated oxygen 
sensor 2 heater 
control circuit low

The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM 
through the heated oxygen sensor 2 heater.)

• Harness or connectors

(The heated oxygen sensor 2 heater circuit is 
open or shorted.)

• Heater oxygen sensor 2 heater

P0057
0057
(Bank 2)

P0038
0038
(Bank 1)

Heated oxygen 
sensor 2 heater 
control circuit high

The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM 
through the heated oxygen sensor 2 heater.)

• Harness or connectors

(The heated oxygen sensor 2 heater circuit is 
shorted.)

• Heater oxygen sensor 2 heater

P0058
0058
(Bank 2)

2010 Pathfinder

EC-110

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0037, P0038, P0057, P0058 HO2S2 HEATER

4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Start the engine and keep the engine speed between 3,500 rpm and 4,000 rpm for at least 1 minute under

no load.

7. Let engine idle for 1 minute.
8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to 

EC-110, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III” above.

Diagnosis Procedure

INFOID:0000000005257080

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body. Refer to 

EC-100, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK HO2S2 POWER SUPPLY CIRCUIT

1. Disconnect heated oxygen sensor 2 harness connector.

2. Turn ignition switch ON.

BBIA0539E

BBIA0540E

2010 Pathfinder

P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-111

< COMPONENT DIAGNOSIS >

[VQ40DE]

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3. Check voltage between HO2S2 terminal 3 and ground with

CONSULT-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• IPDM E/R harness connector E119

• 15 A fuse (No.54)

• Harness for open or short between heated oxygen sensor 2 and fuse

>> Repair harness or connectors.

4.

CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal and HO2S2 terminal as follows.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK HEATED OXYGEN SENSOR 2 HEATER

Refer to 

EC-111, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning heated oxygen sensor 2.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000005257081

HEATED OXYGEN SENSOR 2 HEATER

Voltage: Battery voltage

PBIB0112E

DTC

Terminals

Bank

ECM

Sensor

P0037, P0038

25

2

1

P0057, P0058

6

2

2

Continuity should exist.

2010 Pathfinder

EC-112

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0037, P0038, P0057, P0058 HO2S2 HEATER

1. Check resistance between HO2S2 terminals as follows.

2. If NG, replace heated oxygen sensor 2.

CAUTION:

• Discard any heated oxygen sensor which has been dropped

from a height of more than 0.5 m (19.7 in) onto a hard surface

such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system

threads using Oxygen Sensor Thread Cleaner tool J-43897-18

or J-43897-12 and approved anti-seize lubricant.

Terminal No.

Resistance

2 and 3

9.9 - 13.3 

Ω

 at 25

°

C (77

°

F)

1 and 2, 3, 4

∞

 

Ω

(Continuity should not exist)

4 and 1, 2, 3

SEF249Y

2010 Pathfinder

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-113

< COMPONENT DIAGNOSIS >

[VQ40DE]

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P0075, P0081 IVT CONTROL SOLENOID VALVE

Component Description

INFOID:0000000005257082

Intake valve timing control solenoid valve is activated by ON/OFF

pulse duty (ratio) signals from the ECM.

The intake valve timing control solenoid valve changes the oil

amount and direction of flow through intake valve timing control unit

or stops oil flow.

The longer pulse width advances valve angle.

The shorter pulse width retards valve angle.

When ON and OFF pulse widths become equal, the solenoid valve

stops oil pressure flow to fix the intake valve angle at the control

position.

On Board Diagnosis Logic

INFOID:0000000005257083

DTC Confirmation Procedure

INFOID:0000000005257084

1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to 

EC-113, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257085

1.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake valve timing control solenoid valve harness connector.

3. Turn ignition switch ON.

PBIB1842E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0075
0075
(Bank 1)

Intake valve timing control 
solenoid valve circuit

An improper voltage is sent to the ECM 
through intake valve timing control solenoid 
valve.

• Harness or connectors

(Intake valve timing control solenoid valve 
circuit is open or shorted.)

• Intake valve timing control solenoid valve

P0081
0081
(Bank 2)

BBIA0553E

2010 Pathfinder

EC-114

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0075, P0081 IVT CONTROL SOLENOID VALVE

4. Check voltage between intake valve timing control solenoid

valve terminal 2 and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• Harness connectors F26, F225 (bank 1)

• Harness for open or short between intake valve timing control solenoid valve and IPDM E/R

• Harness for open or short between intake valve timing control solenoid valve and ECM

>> Repair harness or connectors.

3.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN

AND SHORT
1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 11 (bank 1) or 10 (bank 2) and intake valve timing con-

trol solenoid valve terminal 1. Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power. 
OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors F26, F225 (bank 1)

• Harness for open and short between ECM and intake valve timing control solenoid valve

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-114, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning intake valve timing control solenoid valve.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000005257086

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

1. Disconnect intake valve timing control solenoid valve harness connector.

Voltage: Battery voltage

PBIB0192E

Continuity should exist.

2010 Pathfinder

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-115

< COMPONENT DIAGNOSIS >

[VQ40DE]

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EC

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2. Check resistance between intake valve timing control solenoid

valve as follows.

If NG, replace intake valve timing control solenoid valve.

If OK, go to next step.

3. Remove intake valve timing control solenoid valve.

4. Provide 12V DC between intake valve timing control solenoid

valve terminals and then interrupt it. Make sure that the plunger

moves as shown in the figure.

CAUTION:

Never apply 12V DC continuously for 5 seconds or more.

Doing so may result in damage to the coil in intake valve

timing control solenoid valve.

If NG, replace intake valve timing control solenoid valve.

NOTE:

Always replace O-ring when intake valve timing control

solenoid valve is removed.

Terminal

Resistance

1 and 2

7.0 - 7.7

Ω

 at 20

°

C (68

°

F)

1 or 2 and ground

∞Ω

(Continuity should not exist.)

PBIB0193E

PBIB2275E

2010 Pathfinder