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3-78 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
•
Connect a digital meter [A] to the connector of the vehicle
-down sensor [B], with the needle adapter set [C].
Special Tool - Needle Adapter Set: 57001-1457
Vehicle-down sensor Power Source Voltage
Connections to Sensor
Meter (+) → BL lead [D]
Meter (–) → BR/BK lead [E]
•
Turn the ignition switch ON, and measure the power
source voltage with the connector joined.
Power Source Voltage at Sensor
Standard: DC 4 .75 ∼ 5.25 V
•
Turn the ignition switch OFF.
If there is no voltage, check the following:
Battery (see Charging Condition Inspection in the Elec-
trical System chapter)
ECU Main Fuse 15 A (see Fuse Inspection in the Elec-
trical System chapter)
If the power source is normal, check the output voltage.
•
Turn the ignition switch OFF.
•
Remove the vehicle-down sensor.
○
Do not disconnect the sensor connector.
•
Connect a digital meter [A] to the connector, with needle
adapter set [B].
Special Tool - Needle Adapter Set: 57001-1457
Vehicle-down sensor Output Voltage
Connections to Sensor
Meter (+) → Y/G lead [C]
Meter (–) → BR/BK lead [D]
•
Hold the sensor vertically.
•
Turn the ignition switch ON, and measure the output volt-
age with the connector joined.
○
Tilt the sensor 60 ∼ 70° or more [E] right or left, then hold
the sensor almost vertical with the arrow mark pointed up,
and measure the output voltage.
Output Voltage at Sensor
Standard:
with sensor arrow m ark pointed up: 3.55 ∼
4.45 V
with sensor tilted 60 ∼ 70° or more right or
left: 0.65 ∼ 1.35 V
NOTE
○
If you need to test again, turn the ignition switch OFF,
and then ON.
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