Diagnostic Procedure

CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake air temperature sensor harness connector.
  
  Fig 1: Identifying Intake Air Temperature Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between terminal 5 and ground.
  
  Fig 2: Checking Intake Air Temperature Sensor Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
1. OK: GO TO 3 .
2. NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and intake air temperature sensor.
1. Repair harness or connectors.
CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between sensor terminal 3 and engine ground.
  Refer to Wiring Diagram.
  
  Continuity should exist.
3. Also check harness for short to power.
  OK or NG
1. OK: GO TO 5 .
2. NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check harness for open between ECM and intake air temperature sensor.
1. Repair open circuit or short to power in harness or connectors.
CHECK INTAKE AIR TEMPERATURE SENSOR
Check resistance between intake air temperature sensor terminals 3 and 5 as shown in Fig 3 and Figure .

Fig 3: Displaying Temperature Resistance Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 6.
2. NG: Replace intake air temperature sensor.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. INSPECTION END