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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 614 (Heater & Air Conditioning Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B257B: Ambient Sensor >> Component Inspection

Component Inspection

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK AMBIENT SENSOR 
    1. Turn ignition switch OFF.
    2. Disconnect ambient sensor connector.
    3. Check resistance between ambient sensor terminals.

      Terminal

      Condition

      Resistance: kOhm

      Temperature: deg.C (deg.F)

      1

      2

      -15 (5)

      12.73

      -10 (14)

      9.92

      -5 (23)

      7.80

      0 (32)

      6.19

      5 (41)

      4.95

      10 (50)

      3.99

      15 (59)

      3.24

      20 (68)

      2.65

      25 (77)

      2.19

      30 (86)

      1.81

      35 (95)

      1.51

      40 (104)

      1.27

      45 (113)

      1.07

    Is the inspection result normal?

    YES

    Inspection End.

    NO

    Replace ambient sensor. Refer to Removal and Installation .