Vehicle-down Sensor (Service Code 31)
If the power source is normal, check the output voltage of
Connect a digital volt meter [A] to the connector (natural,
3P), using two needle adapters [B].
Turn the ignition SW ON, and measure the output voltage
with the connector joined.
Tilt the sensor (40 50°) or more [C] right or left, then hold
the sensor almost vertical [D] with the arrow mark pointed
up, and measure the output voltage.
Vehicle-down Sensor Output Voltage
Connections to Sensor
Meter (+) → Y/G lead [E]
Meter (−) → BK/Y lead [F]
Output Voltage at Sensor
with sensor tilted 40
or more right or left:
with sensor arrow mark
pointed up: 0.4
If you need to test again, turn the ignition SW OFF, and
Turn the ignition SW OFF.
Remove the needle adapters, and apply silicone sealant
to the seals of the connector for waterproofing.
Silicone Sealant (Kawasaki Bond: 56019-120)
- Seals of Vehicle-down Sensor Connector
If the output voltage is out of the specified, replace the
If the output voltage is normal, the wiring is suspect.
Check the wiring.
If the wiring is good, check the ECU for its ground and
power supply (see ECU section in this chapter). If the
ground and power supply of the ECU are good, the ECU
is suspect. Replace the ECU.
FUEL SYSTEM (DFI) 3-63