1990 Mazda B2600i Base, 2D PickupFACTORY OEM SERVICE PROCEDURE

Intake Air Temperature Sensor Test

Remove air cleaner cover. Heat intake air temperature sensor and note temperature. See Fig 1 . Using an ohmmeter, check resistance between Black/Light Green wire and Yellow/White wire terminals of intake air temperature sensor. See INTAKE AIR TEMPERATURE SENSOR RESISTANCEΒ  table. If resistance is not as specified, replace sensor.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature Β°F (Β°C) Ohms
-4 (-20) 14,600-17,800
68 (20) 2200-2700
176 (80) 290-350
Fig 1: Heating Intake Air Temperature Sensor
G117731Courtesy of MAZDA MOTORS CORP.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.