Vehicle-down Sensor (Service Code 31)
Vehicle-down Sensor Inspection
Be sure the battery is fully charged.
Windshield (see Windshield Removal in the Frame
Rubber Cover (pry open)
Connect a digital volt 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 Relay (see Relay Circuit Inspection in the
Electrical System chapter)
ECU Fuse 10 A (see Fuse Inspection in the Electrical
If the power source is normal, check the output voltage.
FUEL SYSTEM (DFI) 3-67