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FUEL SYSTEM (DFI) 3-53
Intake Air Pressure Sensor #1 (Service Code 12)
Intake Air Pressure Sensor #1 Input Voltage
Inspection
NOTE
○
Be sure the battery is fully charged.
•
Turn the ignition switch off.
•
Remove the air cleaner housing (see Air Cleaner Housing
Removal).
•
Disconnect the intake air pressure sensor #1 connector
and connect the measuring adapter [A] between these
connectors.
Main Harness [B]
Intake Air Pressure Sensor #1 [C]
Special Tool - Measuring Adapter: 57001-1700
•
Connect a digital meter [D] to the measuring adapter
leads.
Intake Air Pressure Sensor #1 Input Voltage
Connections to Adapter:
Digital Meter (+) → R (sensor BL) lead
Digital Meter (–) → BK (sensor G) lead
•
Measure the input voltage with the engine stopped and
with the connector joined.
•
Turn the ignition switch on.
Input Voltage
Standard: DC 4.75
∼ 5.25 V
•
Turn the ignition switch off.
If the reading is within the standard, check the output volt-
age (see Intake Air Pressure Sensor #1 Output Voltage
Inspection).
If the reading is out of the standard, remove the ECU
and check the wiring for continuity between main harness
connectors.
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Intake Air Pressure Sensor #1 Connector [B]
BL lead (ECU terminal 4) [C]
G lead (ECU terminal 49) [D]
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation).
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