3-66 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
Vehicle-down Sensor Output Voltage Inspection
Measure the output voltage at the vehicle-down sensor in
the same way as input voltage inspection, note the follow-
Connect the measuring adapter [A] between the main har-
ness connector and vehicle-down sensor connector as
Special Tool - Measuring Adapter: 57001-1700
Main Harness [B]
Vehicle-down Sensor [C]
Connect a digital meter [D] to the measuring adapter
Vehicle-down Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → W (main harness Y/R) lead
Digital Meter (–) → BK (main harness BR/Y) lead
Hold the sensor vertically.
Measure the output voltage with the engine stopped, and
with the connector joined.
Turn the ignition switch ON.
Tilt the sensor 40 ∼ 50° or more [A] right or left, then hold
the sensor almost vertical with the arrow mark pointed up
[B], and measure the output voltage.
With sensor tilted 40 ∼ 50° or more right or
left: DC 0.65 ∼ 1.35 V
With sensor arrow mark pointed up: DC
3.55 ∼ 4.45 V
If you need to test again, turn the ignition switch OFF,
and then ON.
Turn the ignition switch OFF.
If the reading is out of the standard, replace the sensor.