Diagnostic Procedure For In-Vehicle Sensor

SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or -22 is indicated on display and A/C auto amp. as a result of performing Self-diagnosis STEP-2.)

Fig 1: Diagnostic Procedure For In-Vehicle Sensor

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

1. CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND 
   1. Disconnect in-vehicle sensor connector.
   2. Turn ignition switch ON.
   3. Check voltage between in-vehicle sensor harness connector M42 terminal 1 (BR/R) and ground.

      1 - Ground: Approx. 5V 

      Fig 2: Checking Voltage Between In-Vehicle Sensor And Ground

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

   OK or NG 

   1. OK: GO TO 2.
   2. NG: GO TO  4.
2. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND DISPLAY AND A/C AUTO AMP. 
   1. Turn ignition switch OFF.
   2. Disconnect display and A/C auto amp. connector.
   3. Check continuity between in-vehicle sensor harness connector M42 terminal 2 (W/G) and display and A/C auto amp. harness connector M31 terminal 11 (W/G).

      2 - 11: Continuity should exist. 

      Fig 3: Checking Circuit Continuity Between In-Vehicle Sensor And Display And A/C Auto Amp

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

   OK or NG 

   1. OK: GO TO 3.
   2. NG: Repair harness or connector.
3. CHECK IN-VEHICLE SENSOR 

   Refer to "IN-VEHICLE SENSOR ".

   OK or NG 

   1. OK: Go to next step.
      1. Replace display and A/C auto amp.
      2. Go to self-diagnosis "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
   2. NG: Go to next step.
      1. Replace in-vehicle sensor.
      2. Go to self-diagnosis "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND DISPLAY AND A/C AUTO AMP. 
   1. Turn ignition switch OFF.
   2. Disconnect display and A/C auto amp. connector.
   3. Check continuity between in-vehicle sensor harness connector M42 terminal 1 (BR/R) and display and A/C auto amp. harness connector M31 terminal 3 (BR/R).

      1 - 3: Continuity should exist. 

      Fig 4: Checking Circuit Continuity Between In-Vehicle Sensor And Display And A/C Auto Amp

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

   OK or NG 

   1. OK: Go to next step.
      1. Replace display and A/C auto amp.
      2. Go to self-diagnosis "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
   2. NG: Repair harness or connector.