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Home >> Isuzu >> 1985 >> Pickup Base, 2.2 S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> High Altitude Compensation System >> Operation >> Altitude Switch >> A/T Models

A/T Models

The altitude switch consist of bellows and a micro-switch. The bellows expands or contracts in response to changes in atmospheric pressure. At high altitudes the bellows expands to turn the micro-switch on so that electrical current can be supplied to actuate solenoid valve and the ECM.

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