Nissan Pathfinder (2007 year). Manual - part 167

 

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Nissan Pathfinder (2007 year). Manual - part 167

 

 

DTC P0112, P0113 IAT SENSOR

EC-203

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2007 Pathfinder

DTC P0112, P0113 IAT SENSOR

PFP:22630

Component Description

UBS00K5Q

The intake air temperature sensor is built-into mass air flow sensor
(1). 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 temperature rise.

<Reference data>

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

CAUTION:

Do not 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

UBS00K5R

DTC Confirmation Procedure

UBS00K5S

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 5 seconds.

4.

If 1st trip DTC is detected, go to 

EC-206, "Diagnostic Procedure"

.

PBIA9559J

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 tempera-
ture 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 tempera-
ture sensor circuit 
high input

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

SEF058Y

EC-204

DTC P0112, P0113 IAT SENSOR

2007 Pathfinder

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC P0112, P0113 IAT SENSOR

EC-205

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2007 Pathfinder

Wiring Diagram

UBS00K5T

BBWA1923E

EC-206

DTC P0112, P0113 IAT SENSOR

2007 Pathfinder

Diagnostic Procedure

UBS00K5U

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-153, "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 (intake air temperature sensor
is built-into) harness connector.

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.

BBIA0539E

BBIA0541E

Voltage: Approximately 5V

PBIB1169E

Continuity should exist.

DTC P0112, P0113 IAT SENSOR

EC-207

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2007 Pathfinder

4. 

CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to 

EC-207, "Component Inspection"

  .

OK or NG

OK

>> GO TO 5.

NG

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

5. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

  .

>> INSPECTION END

Component Inspection

UBS00K5V

INTAKE AIR TEMPERATURE SENSOR

1.

Check resistance between mass air flow sensor (1) terminals 5
and 6 under the following conditions.

2.

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

Removal and Installation

UBS00K5W

MASS AIR FLOW SENSOR

Refer to 

EM-16, "AIR CLEANER AND AIR DUCT"

  .

Intake air temperature 

°

C (

°

F)

Resistance k

Ω

25 (77)

1.800 - 2.200

PBIA9559J

SEF012P

EC-208

DTC P0117, P0118 ECT SENSOR

2007 Pathfinder

DTC P0117, P0118 ECT SENSOR

PFP:22630

Component Description

UBS00K5X

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:

Do not 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

UBS00K5Y

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 lights up.

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 tem-
perature sensor cir-
cuit 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 tem-
perature sensor cir-
cuit high input

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

Detected items

Engine operating condition in fail-safe mode

Engine coolant temper-

ature sensor circuit

Engine coolant temperature will be determined by ECM based on the time after turning ignition switch ON 
or START.
CONSULT-II displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided 

(CONSULT-II display)

Just as ignition switch is turned ON or START

40

°

C (104

°

F)

More than approx. 4 minutes after ignition ON or 
START

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.

DTC P0117, P0118 ECT SENSOR

EC-209

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2007 Pathfinder

DTC Confirmation Procedure

UBS00K5Z

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 5 seconds.

4.

If DTC is detected, go to 

EC-211, "Diagnostic Procedure"

  .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

EC-210

DTC P0117, P0118 ECT SENSOR

2007 Pathfinder

Wiring Diagram

UBS00K60

BBWA1740E

 

 

 

 

 

 

 

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