3-60 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
Remove the vehicle-down sensor (see Vehicle-down
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 Connector:
Meter (+) → Y/G lead [E]
Meter (–) → BR/BK lead [F]
Hold the sensor vertically.
Turn the ignition switch to ON, and measure the output
voltage with the connector joined.
Tilt the sensor 60 ∼ 70° or more [C] right or left, then hold
the sensor almost vertical with the arrow mark pointed up
[D], and measure the output voltage.
with sensor tilted 60 ∼ 70° or more right or
left: 0.65 ∼ 1.35 V
with sensor arrow mark pointed up: 3.55 ∼
If you need to test again, turn the ignition switch to OFF,
and then ON.
Turn the ignition switch to OFF.
If the output voltage is normal, check the wiring.
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).
If the output voltage is out of the specified, replace the