3-58 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
Vehicle-down Sensor Output Voltage Inspection
Remove the vehicle-down sensor.
Remove the vehicle-down sensor, and connect the mea-
suring adapter [A].
Special Tool - Measuring Adapter: 57001-1700
Main Harness [B]
Vehicle-down Sensor [C]
Connect a digital meter [D] to the harness adapter leads.
Vehicle-down Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → W (sensor Y/G) lead (KX450E9F)
Digital Meter (+) → W (sensor BR) lead
Digital Meter (–) → BK (sensor GY) lead
Hold the sensor vertically.
Connect the power supply harness (option P/No. 26011
-0246) and 12 V battery to the capacitor lead connector
(see Vehicle-down Sensor Input Voltage Inspection).
Measure the output voltage with the engine stopped, and
with the connector joined.
Tilt the sensor 55 ∼ 75° or more [A] right or left, then hold
the sensor almost vertical with the arrow mark [B] pointed
up [C], and measure the output voltage.
With sensor tilted 55 ∼ 75° or more right
or left: DC 3.7 ∼ 4.4 V
With sensor arrow mark pointed up: DC
0.4 ∼ 1.4 V
If you need to test again, disconnect the battery con-
If the reading is out of the standard, replace the sensor.