D50/Ram 50 L4-2350cc 2.4L SOHC (1992)
Barometric Pressure Sensor: Testing and Inspection
Barometric Pressure Sensor Circuit
To test the Barometric Pressure Sensor, located on the air flow sensor, on the air cleaner housing, proceed as follows.
COMPONENT TEST
1. Connect a voltmeter between terminals 2 and 5 of the AFS Sensor connector.
Terminal 2: Barometric sensor output
Terminal 5: sensor ground
Terminal 1: sensor 5v power
Voltage (W/ key on and engine off)
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At sea level
Approximately 4.0 volts.
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At 2,000 ft.
Approximately 3.75 volts.
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At 4,000 ft.
Approximately 3.50 volts.
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At 6,000 ft.
Approximately 3.25 volts.
2. Warm the engine and bring it to a normal idle.
3. Slowly cover about half of the air cleaner air intake, observing the change in voltage. As pressure falls (vacuum increases), you should observe a
drop in voltage.
HARNESS TEST:
1. Disconnect the air flow sensor connector and turn the key to the ON position.
2. Using a voltmeter, measure the power supply voltage between the harness connector terminal 1 and ground.
Voltage:
