Nissan Sentra B18 (2020-2025) Service Manual: P0111 Iat Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0111 Iat Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0111	IAT SENSOR 1 B1 (Intake air temperature sensor 1 circuit range/performance bank 1)	Diagnosis condition	Engine cold start
		Signal (terminal)	Intake air temperature sensor signal
		Threshold	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 signal of the IAT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (High or low resistance in the IAT sensor circuit)
Intake air temperature sensor

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

INSPECTION START

Is it necessary to erase permanent DTC?
YES >>
GO TO 3.
NO >>
GO TO 2.

PERFORM 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.

With CONSULT

Turn ignition switch OFF.
Disconnect mass air flow sensor harness connector and reconnect it again.
Turn ignition switch ON.
Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

Check that “INT/A TEMP SEN” indicates as per following condition.

Monitor item	Condition		Value
INT/A TEMP SEN	Temperature [°C (°F)]	25 (77)	1.9 – 2.1 V

Is the inspection result normal?

YES-1 >>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2 >>

Confirmation after repair: INSPECTION END

NO >>

Proceed to DTC Diagnosis Procedure.

PRECONDITIONING

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

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.
PERFORM DTC CONFIRMATION PROCEDURE
1. Move the Nissan Sentra 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).
2. Turn ignition switch OFF and leave the Nissan Sentra vehicle for 12 hours.
  
  CAUTION:
  
  Never turn ignition switch ON during this procedure.
  
  Note:
  The Nissan Sentra vehicle must be cooled with the hood open.
3. Start the engine and let it idle for 5 minutes or more.
  
  CAUTION:
  
  Never turn ignition switch OFF during idling.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Proceed to DTC Diagnosis Procedure.
NO-1 >>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>
Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK INTAKE AIR TEMPERATURE (IAT) SENSOR

Refer to Component Inspection.

Is the inspection result normal?
YES >>
INSPECTION END
NO >>
Replace mass air flow sensor (IAT sensor is built-in). Refer to Exploded View.

P010a Manifold Absolute Pressure Sensor

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms ( ...

P0112 Iat Sensor

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

Other materials:

Application Notice
Information Information Service information Design of combination meter TYPE A TYPE B ...

Work Flow
Work Flow OVERALL SEQUENCE DETAILED FLOW INTERVIEW CUSTOMER Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred. ...

Front fog lamp circuit
Description The ipdm e/r (intelligent power distribution module engine room) controls the front fog lamp relay based on inputs from the bcm over the can communication lines. When the front fog lamp relay is energized, power flows from the front fog lamp relay in the ipdm e/r to the front fog ...