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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Heater & Air Conditioning Control System (DTC/Circuit Diagnosis) (Except Hybrid)) >> DTC/Circuit Diagnosis >> DTC B257B, B257C: Ambient Sensor >> Component Inspection

Component Inspection

WARNING: This page is about a different car, the 2016 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: kΩ
      Temperature: °C (°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 .