3-58 FUEL SYSTEM (DFI)
Atmospheric Pressure Sensor (Service Code 15)
If the output voltage is far out of the usable range, check
the output voltage at the sensor connector [A] (when the
wiring is open, the output voltage is about 1.8 V.).
Connect a digital meter to the harness adapter leads.
Atmospheric Pressure Sensor [B]
Special Tool - Sensor Harness Adapter: 57001-1561
Atmospheric Pressure Sensor Output Voltage
Connections to Sensor
Meter (+) → G/W lead [C]
Meter (–) → BR/BK lead [D]
Output Voltage at Sensor
Usable Range: DC 3.80 ∼ 4.20 V at the standard
atmospheric pressure (101.32 kPa, 76
If the output voltage is normal, check the wiring for conti-
If the output voltage is out of the usable range, replace
Atmospheric Pressure Sensor Circuit
2. Atmospheric Pressure Sensor
If you need to check the atmospheric pressure sensor for
various altitudes other than sea level, check the output
voltage as follows:
Determine the local altitude (Elevation).