Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » Heating and Air Conditioning » Testing and Inspection » Component Tests and General Diagnostics » Intake Sensor » Diagnosis Procedure  
 
 
  Diagnosis Procedure  
 

INTAKE SENSOR

Description

Intake Sensor
The intake sensor is located on the heater and cooling unit. It converts temperature of air after it passes through the evaporator into a resistance value which is then input to the front air control.

INTAKE SENSOR

Diagnosis Procedure

  

SYMPTOM: Intake sensor circuit is open or shorted.
1.CHECK VOLTAGE BETWEEN INTAKE SENSOR HARNESS CONNECTOR AND BODY GROUND

  

  1. Disconnect intake sensor connector M69.
  2. Press ignition switch ON.
  3. Check voltage between intake sensor connector M69 terminal 1 and ground.

  

Is the Inspection result normal?
YES >> GO TO 2
NO >> GO TO 4
2.CHECK INTAKE SENSOR GROUND CIRCUIT BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL

  

  1. Press ignition switch OFF.
  2. Disconnect front air control connector M37.
  3. Check continuity between front air control connector M37 (A) terminal 26 and intake sensor harness connector M69 (B) terminal 4.

  

If OK, check harness for short.
Is the Inspection result normal?
YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK INTAKE SENSOR
Check intake sensor. Refer to "Diagnosis Procedure".
Is the Inspection result normal?
YES >> 1. Replace front air control. Refer to See: Control Module HVAC\Service and Repair.

  1. Confirm system operation. NO >> 1. Replace intake sensor. Refer to See: Cabin Temperature Sensor / Switch\Service and Repair\Intake Sensor.
  1. Confirm system operation. 4.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL

  

  1. Press ignition switch OFF.
  2. Disconnect front air control connector M37.
  3. Check continuity between front air control connector M37 (A) terminal 25 and intake sensor harness connector M69 (B) terminal 1.

  

If OK, check harness for short.
Is the Inspection result normal?
YES >> 1. Replace front air control, Refer to See: Control Module HVAC\Service and Repair.

  1. Confirm system operation. NO >> Repair harness or connector.