Diagnostic Procedure For In-Vehicle Sensor

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: In-Vehicle Sensor Circuit

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

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 M46 terminal 1 (BR/W) and ground.
  1. 1 - Ground: Approx. 5V
OK or NG
1. OK: GO TO 2.
2. NG: GO TO 4.
Fig 2: Checking Voltage Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between in-vehicle sensor harness connector M46 terminal 2 (W/G) and unified meter and A/C amp. harness connector M57 terminal 49 (W/G).
  1. 2-49: Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair harness or connector.
Fig 3: Checking Continuity Between Terminal 2 And Terminal 49
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK IN-VEHICLE SENSOR
Refer to "IN-VEHICLE SENSOR ".

OK or NG
1. OK :
  1. Replace unified meter and A/C amp.
  2. Go to self-diagnosis "FUNCTION CONFIRMATION PROCEDURE " and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
2. NG :
  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.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between in-vehicle sensor harness connector M46 terminal 1 (BR/W) and unified meter and A/C amp. harness connector M57 terminal 40 (BR/W).
  1. 1 - 40: Continuity should exist.
4. Check continuity between in-vehicle sensor harness connector M46 terminal 1 (BR/W) and ground.
  1. 1 - Ground: Continuity should not exist.
Fig 4: Checking Continuity Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK :
  1. Replace unified meter and A/C 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