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3-58 FUEL SYSTEM (DFI)
Inlet Air Pressure Sensor (Service Code 12)
If the output voltage is far out of the usable range, check
the output voltage again at the sensor connector [A]
(when the lead is open, the output voltage is about 1.8
V).
•
Connect a digital meter to the harness adapter leads.
Inlet Air Pressure Sensor [B]
Special Tool - Sensor Harness Adapter: 57001-1561
Inlet Air Pressure Sensor Output Voltage
Connections to Adapter
Meter (+) → G/W (sensor Y/BL) lead [C]
Meter (–) → BK (sensor BR/BK) lead [D]
Output Voltage at Sensor Connector
Usable Range:
DC 3.80 ∼ 4.20 V at the standard
atmospheric pressure (101.32 kPa or
76 cmHg abs.)
If the output voltage is normal, check the wiring for conti-
nuity (see wiring diagram in this section).
If the output voltage is out of the usable range, replace
the sensor.
•
Turn the ignition switch OFF.
•
Remove the harness adapter.
Inlet Air Pressure Sensor Circuit
1. ECU
2. Inlet Air Pressure Sensor
3. Water-proof Joint 2
If you need to check the inlet air pressure sensor for vac-
uum other than 76 cmHg (abs.), check the output voltage
as follows.
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