Nissan Versa Sedan. Manual — part 297

P0102, P0103 MAF SENSOR

EC-187

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Clean or replace mass air flow sensor. Refer to

EM-25, "Removal and Installation"

.

ECM

Condition

Voltage

Connector

+

−

Terminal

F11

45

52

Ignition switch ON (Engine stopped.)

Approx. 0.4 V

Idle (Engine is warmed-up to normal operating temperature.)

0.8 - 1.3 V

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

1.4 - 1.9 V

Idle to about 4,000 rpm

0.8 - 1.3 V to Approx. 4.3 V*

EC-188

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

P0111 IAT SENSOR

P0111 IAT SENSOR

DTC Logic

INFOID:0000000009267083

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

Is it necessary to erase permanent DTC?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to

EC-189, "Component Function Check"

.

NOTE:

Use the component function check to check the overall function of the IAT sensor circuit. During this check, a

1st trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to

EC-189, "Diagnosis Procedure"

.

3.

PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-

dure before conducting 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.

TESTING CONDITION:

• Before performing the following procedure, do not add fuel.

• Before performing the following procedure, check that fuel level is between 1/4 and 4/4.

• Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>> GO TO 4.

4.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 60 minutes.

2. Move the vehicle to a cool place.

NOTE:

Cool the vehicle in an environment of ambient air temperature between

−10°C (14°F) and 35°C (95°F).

3. Turn ignition switch OFF and soak the vehicle for 12 hours.

CAUTION:

Never turn ignition switch ON during soaking.

NOTE:

The vehicle must be cooled with the food open.

4. Start engine and let it idle for 5 minutes or more.

CAUTION:

Never turn ignition switch OFF during idling.

5. Check 1st trip DTC.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0111

IAT SENSOR 1 B1
[Intake air temperature (IAT) sen-
sor circuit range/performance]

The comparison result of signals transmitted to ECM
from each temperature sensor (IAT sensor, ECT sensor,
FTT sensor, and EOT sensor) shows that the voltage sig-
nal of the IAT sensor is higher/lower than that of other
temperature sensors when the engine is started with its
cold state.

• Harness or connectors

(High or low resistance in
the IAT sensor circuit)

• IAT sensor

P0111 IAT SENSOR

EC-189

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is 1st trip DTC detected?

YES

>> Proceed to

EC-189, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Component Function Check

INFOID:0000000009267084

1.

CHECK INTAKE AIR TEMPERATURE (IAT) SENSOR

1. Turn ignition switch OFF.

2. Disconnect mass air flow sensor harness connector.

3. Check resistance between mass air flow sensor terminals as follows.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-45, "Intermittent Incident"

.

NO

>> Proceed to

EC-189, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009267085

1.

CHECK INTAKE AIR TEMPERATURE (IAT) SENSOR

Check intake air temperature sensor. Refer to

EC-189, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-45, "Intermittent Incident"

.

NO

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

EM-25, "Removal and

Installation"

.

Component Inspection

INFOID:0000000009267086

1.

CHECK INTAKE AIR TEMPERATURE SENSOR

1. Turn ignition switch OFF.

2. Disconnect mass air flow sensor harness connector.

3. Check resistance between mass air flow sensor terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

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

EM-25, "Removal and

Installation"

.

Mass air flow sensor

Condition

Resistance (k

Ω)

Terminal

5

6

Temperature [

°C (°F)]

25 (77)

1.800 – 2.200

Mass air flow sensor

Condition

Resistance (k

Ω)

Terminals

5

6

Temperature [

°C (°F)]

25 (77)

1.800 - 2.200

EC-190

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

P0112, P0113 IAT SENSOR

P0112, P0113 IAT SENSOR

DTC Logic

INFOID:0000000009267087

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

before conducting 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?

YES

>> Go to

EC-190, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009267088

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E15. Refer to Ground Inspection in

GI-48, "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 (MAF) sensor (with intake air temperature sensor) harness connector.

2. Turn ignition switch ON.

3. Check the voltage between mass air flow sensor harness connector 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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0112

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

Intake air temperature sensor
circuit high input

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

MAF sensor

Ground

Voltage

Connector

Terminal

F31

5

Ground

Approx. 5 V