Atmospheric Pressure Sensor (Service Code 15)
If the output voltage is far out of the usable range, remove
the fuel tank, and 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 [A] to the harness adapter leads.
[B] Atmospheric Pressure Sensor
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
If the output voltage is normal, check the wiring for conti-
nuity (see next diagram).
If the output voltage is out of the usable range, replace
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).
3.80 ∼ 4.20 V DC at the standard
atmospheric pressure (101.32 kPa,
76 cmHg abs)
2. Atmospheric Pressure Sensor
FUEL SYSTEM (DFI) 3-83