Nissan Pathfinder (2009 year). Manual - part 323

 

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Nissan Pathfinder (2009 year). Manual - part 323

 

 

EC-598

< COMPONENT DIAGNOSIS >

[VK56DE]

P0102, P0103 MAF SENSOR

8.

If NG, clean or replace mass air flow sensor.

2009 Pathfinder

P0112, P0113 IAT SENSOR

EC-599

< COMPONENT DIAGNOSIS >

[VK56DE]

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P0112, P0113 IAT SENSOR

Component Description

INFOID:0000000003936523

The intake air temperature sensor is built-into the mass air flow sen-
sor. The sensor detects intake air temperature and transmits a signal
to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the rise in temperature.

<Reference data>

*: This data is reference value and is measured between ECM terminal 34 (Intake air
temperature sensor) and ground.

CAUTION:

Never use ECM ground terminals when measuring input/output
voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.

On Board Diagnosis Logic

INFOID:0000000003936524

DTC Confirmation Procedure

INFOID:0000000003936525

1.

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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.

Turn ignition switch ON.

3.

Wait at least 5 seconds.

4.

Check 1st trip DTC.

5.

If 1st trip DTC is detected, go to 

EC-599, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003936526

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten ground screws on the body.

BBIA0355E

Intake air temperature

[

°

C (

°

F)]

Voltage* (V)

Resistance (k

Ω

)

25 (77)

3.3

1.800 - 2.200

80 (176)

1.2

0.283 - 0.359

SEF012P

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0112
0112

Intake air temperature 
sensor circuit low input

An excessively low voltage from the sensor is 
sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Intake air temperature sensor

P0113
0113

Intake air temperature 
sensor circuit high input

An excessively high voltage from the sensor is 
sent to ECM.

2009 Pathfinder

EC-600

< COMPONENT DIAGNOSIS >

[VK56DE]

P0112, P0113 IAT SENSOR

Refer to 

EC-568, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect mass air flow sensor (with intake air temperature
sensor) (1) harness connector.

-

: Vehicle front

2.

Turn ignition switch ON.

3.

Check voltage between mass air flow sensor terminal 5 and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connectors.

3.

CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between mass air flow sensor terminal 6 and ECM terminal 67.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 4.

NG

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

4.

CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to 

EC-601, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace mass air flow sensor (with intake air temperature sensor).

BBIA0539E

ALBIA0353ZZ

Voltage: Approximately 5 V

PBIB1169E

Continuity should exist.

2009 Pathfinder

P0112, P0113 IAT SENSOR

EC-601

< COMPONENT DIAGNOSIS >

[VK56DE]

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5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-49, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004333338

INTAKE AIR TEMPERATURE SENSOR

1.

Check resistance between intake air temperature sensor termi-
nals 5 and 6 under the following conditions.

2.

If NG, replace mass air flow sensor (with intake air temperature
sensor).

Intake air temperature [

°

C (

°

F)]

Resistance (k

Ω

)

25 (77)

1.800 - 2.200

BBIA0355E

SEF012P

2009 Pathfinder

EC-602

< COMPONENT DIAGNOSIS >

[VK56DE]

P0116 ECT SENSOR

P0116 ECT SENSOR

Component Description

INFOID:0000000004333340

The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

<Reference data>

*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) and ground.

CAUTION:

Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

On Board Diagnosis Logic

INFOID:0000000004333320

NOTE:
If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to 

EC-606, "DTC Confirmation Procedure"

.

DTC Confirmation Procedure

INFOID:0000000004333321

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, do not add fuel.

1.

Start engine and warm it up to normal operating temperature.

2.

Rev engine up to 2,000 rpm for more than10 minutes.

3.

Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.

4.

Check resistance between “fuel level sensor and fuel pump” terminals 3 and 4.

SEF594K

Engine coolant temperature

[

°

C (

°

F)]

Voltage* (V)

Resistance (k

Ω

)

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.1 - 2.9

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

SEF012P

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0116
0116

Engine coolant tempera-
ture sensor circuit range/
performance

Engine coolant temperature signal from engine 
coolant temperature sensor does not fluctuate, 
even when some time has passed after starting 
the engine with pre-warming up condition.

• Harness or connectors

(High or low resistance in the circuit)

• Engine coolant temperature sensor

2009 Pathfinder

P0116 ECT SENSOR

EC-603

< COMPONENT DIAGNOSIS >

[VK56DE]

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5.

Soak the vehicle until the resistance between “fuel level sensor and fuel pump” terminals 3 and 4
becomes 0.5 k

Ω

 higher than the value measured before soaking.

CAUTION:

Never turn ignition switch ON during soaking.
NOTE:
Soak time changes depending on ambient air temperature. It may take several hours.

6.

Start engine and let it idle for 5 minutes.

7.

Check 1st trip DTC.

8.

If 1st trip DTC is detected, go to 

EC-603, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004333322

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten ground screws on the body.
Refer to 

EC-568, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-603, "Component Inspection"

.

OK or NG

OK

>> GO TO 3.

NG

>> Replace engine coolant temperature sensor.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-49, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004333341

ENGINE COOLANT TEMPERATURE SENSOR

1.

Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

BBIA0539E

PBIB2005E

2009 Pathfinder

EC-604

< COMPONENT DIAGNOSIS >

[VK56DE]

P0116 ECT SENSOR

2.

If NG, replace engine coolant temperature sensor.

Engine coolant temperature [

°

C (

°

F)]

Resistance (k

Ω

)

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

 0.236 - 0.260

SEF012P

2009 Pathfinder

P0117, P0118 ECT SENSOR

EC-605

< COMPONENT DIAGNOSIS >

[VK56DE]

C

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EC

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P0117, P0118 ECT SENSOR

Component Description

INFOID:0000000003936528

The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

<Reference data>

*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) and ground.

CAUTION:

Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

On Board Diagnosis Logic

INFOID:0000000003936529

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates.

SEF594K

Engine coolant temperature

[

°

C (

°

F)]

Voltage* (V)

Resistance (k

Ω

)

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.1 - 2.9

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

SEF012P

DTC 

No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0117
0117

Engine coolant temperature 
sensor circuit low input

An excessively low voltage from the sensor is 
sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Engine coolant temperature sensor 

P0118
0118

Engine coolant temperature 
sensor circuit high input

An excessively high voltage from the sensor is 
sent to ECM.

Detected items

Engine operating condition in fail-safe mode

Engine coolant temperature 
sensor circuit

Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided 

(CONSULT-III display)

Just as ignition switch is turned ON or START

40

°

C (104

°

F)

Approx. 4 minutes or more after engine starting

80

°

C (176

°

F)

Except as shown above

40 - 80

°

C (104 - 176

°

F)

(Depends on the time)

When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates 
while engine is running.

2009 Pathfinder

 

 

 

 

 

 

 

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