Nissan Altima HL32 Hybrid. Manual - part 294

EC-160

< COMPONENT DIAGNOSIS >

[QR25DE]

P0102, P0103 MAF SENSOR

12. Check the voltage between ECM harness connector and

ground.

13. Fully release accelerator pedal then fully depress it.

14. Check for linear voltage rise in response to engine being

increased to about 2,500 rpm.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Clean or replace mass air flow sensor.

ECM

Ground

Condition

Voltage

Connector

Terminal

F13

58

(MAF sensor signal)

Ground

2,500 rpm (Engine is 
warmed-up to normal op-
erating temperature.)

1.5 - 1.8 V

JMBIA1633ZZ

P0112, P0113 IAT SENSOR

EC-161

< COMPONENT DIAGNOSIS >

[QR25DE]

C

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EC

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P0112, P0113 IAT SENSOR

Description

INFOID:0000000004211393

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>

*: These data are reference values and are measured between ECM terminal 50
(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.

DTC Logic

INFOID:0000000004211394

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

ing the next test.

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.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

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

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

Intake air tempera-
ture sensor circuit 
high input

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

EC-162

< COMPONENT DIAGNOSIS >

[QR25DE]

P0112, P0113 IAT SENSOR

YES

>> Go to 

EC-162, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004211395

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

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

2. Turn ignition switch ON.

3. Check the voltage between mass air flow sensor harness con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power

in 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 the continuity between mass air flow sensor harness connector and ECM harness connector.

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to 

EC-162, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004211396

1.

CHECK INTAKE AIR TEMPERATURE SENSOR

1. Turn ignition switch OFF.

2. Disconnect mass air flow sensor harness connector.

MAF sensor

Ground

Voltage

Connector

Terminal

F31

2

Ground

Approx. 5V

PBIB1168E

MAF sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F31

1

F13

56

Existed

P0112, P0113 IAT SENSOR

EC-163

< COMPONENT DIAGNOSIS >

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3. Check resistance between mass air flow sensor terminals as fol-

lows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace mass air flow sensor (with intake air tempera-

ture sensor).

Terminals

Condition

Resistance k

Ω

1 and 2

Intake air temperature 

°C (°F)

25 (77)

1.800 - 2.200

JMBIA1624ZZ