Diagnostic Procedure For Ambient Sensor

SYMPTOM: Ambient sensor circuit is open or shorted. (40 or 41 is indicated on front air control As a result of conducting the front air control self-diagnosis)

Fig 1: Connecting Ambient Sensor Circuit Between Front Air Control Connector Terminals

Courtesy of NISSAN MOTOR CO., U.S.A.

1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND 
   1. Disconnect ambient sensor connector.
   2. Turn ignition switch ON.
   3. Check voltage between ambient sensor harness connector E1 terminal 1 (O/B) and ground.
   Fig 2: Checking Voltage Between Ambient Sensor Harness Connector Terminal 1 & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   • Approx. 5V 

   OK or NG

   • OK: GO TO 2.
   • NG: GO TO  4.
2. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL 
   1. Turn ignition switch OFF.
   2. Disconnect front air control connector.
   3. Check continuity between ambient sensor harness connector E1 terminal 2 (GR/R) and front air control harness connector M49 terminal 17 (GR/R).
   Fig 3: Checking Circuit Continuity Between Ambient Sensor Connector E1 Terminal 2 & Front Air Control Harness Connector M49 Terminal 17

   Courtesy of NISSAN MOTOR CO., U.S.A.
   • Continuity should exist. 

   OK or NG

   • OK: GO TO 3.
   • NG: Repair harness or connector.
3. CHECK AMBIENT SENSOR 

   Refer to "AMBIENT SENSOR ".

   OK or NG

   • OK:
     1. Replace front air control. Refer to "FRONT AIR CONTROL ".
     2. Go to self-diagnosis "A/C SYSTEM SELF-DIAGNOSIS FUNCTION " and perform self-diagnosis.
   • NG:
     1. Replace ambient sensor.
     2. Go to self-diagnosis "A/C SYSTEM SELF-DIAGNOSIS FUNCTION " and perform self-diagnosis.
4. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL 
   1. Turn ignition switch OFF.
   2. Disconnect front air control connector.
   3. Check continuity between ambient sensor harness connector E1 terminal 1 (O/B) and front air control harness connector M49 terminal 21 (O/B).
      Fig 4: Checking Circuit Continuity Between Ambient Sensor Harness Connector E1 Terminal 1 & Front Air Control Harness Connector M49 Terminal 21

      Courtesy of NISSAN MOTOR CO., U.S.A.
      • Continuity should exist. 
   4. Check continuity between ambient sensor harness connector E1 terminal 1 (O/B) and ground.

      Continuity should not exist. 

   OK or NG

   • OK:
     1. Replace front air control. Refer to "FRONT AIR CONTROL ".
     2. Go to self-diagnosis "A/C SYSTEM SELF-DIAGNOSIS FUNCTION " and perform self-diagnosis.
   • NG: Repair harness or connector.