Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Mazda B2600i Base, 2D PickupFACTORY OEM SERVICE PROCEDURE
Atmospheric Pressure Sensor Test: Notes
- Remove left side kick panel. Remove rubber cap from atmospheric pressure sensor. Attach hand-held vacuum pump to sensor port. Turn ignition on. Check voltage between each terminal and ground while applying and releasing 30 in. Hg to sensor. See Figure .
- If voltage at terminals "A", "B" or "C" are not within specification, check wiring harness to sensor. If voltage at terminals "A", "B" or "C" is within specification, but terminal "D" is not within specification, replace atmospheric pressure sensor.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.