Diamante Sedan V6-2972cc 3.0L DOHC (1993)
Barometric Pressure Sensor: Testing and Inspection
Barometric Sensor
Engine Control Module Connector--For Pin Applications See Components
To test the Barometric Pressure Sensor, located on the air flow sensor, in the air cleaner housing, proceed as follows.
COMPONENT TEST
1. Connect a voltmeter between terminals 5 and 2 of the AFS Sensor connector.
Terminal 2: Barometric sensor output
Terminal 5: sensor ground
Terminal 1: sensor 5 Volt power
Voltage (with ignition ON and engine OFF)
-
At sea level
Approximately 4.0 volts.
-
At 2,000 ft.
Approximately 3.75 volts.
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At 4,000 ft.
Approximately 3.50 volts.
-
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: 4.8 - 5.2 Volts.
