Vehicle-down Sensor (Service Code 31)

FUEL SYSTEM (DFI) 3-93

• Connect a digital volt meter [A] to the connector of the vehicle-down sensor [B], with the needle adapter set [C],

Vehicle-down Sensor Power Source Voltage Connections to Sensor Meter (+) -► W/Y lead [D]

Meter (-) -» BK/Y lead [E]

• Turn the ignition switch ON, and measure the power source voltage with the connector joined.

Power Source Voltage at Sensor

Standard: Battery Voltage (12.5 V or more)

• Turn the ignition switch OFF.

• If there is no battery voltage, check the following:

Battery (see Electrical System chapter)

ECU Main Fuse 15 A

Wiring for Vehicle-down Sensor Power Source (see next diagram)

• If the power source is normal, check the output voltage.

• Turn the ignition switch OFF.

• Remove the sensor.

• Connect a digital volt meter [A] to the connector, with nee- dle adapter set [B],

Special Tool - Needle Adapter Set: 57001-1457

Vehicle-down Sensor Output Voltage Connections to Sensor Meter (+) -> Y/G lead [D]

Meter (-) BK/Y lead [E]

• Hold the sensor vertically.

• Turn the ignition switch ON, and measure the output volt- age with the connector joined.

O Tilt the sensor 60 - 70' or more [C] right or left, then hold the sensor almost vertical with the arrow mark pointed up, and measure the output voltage.

Output Voltage at Sensor

Standard: with sensor tilted 60 - 70° or more

right or left: 3.7 ~ 4.4 V with sensor arrow mark pointed up:

0.4 ~ 1.4 V

NOTE

o If you need to test again, turn the ignition switch OFF, and then ON.

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• Turn the ignition switch OFF.

• Remove the needle adapter set, 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 normal, the wiring is suspect. Check the wiring.

• If the wiring is good, check the ECU for its ground and power supply (see this chapter). If the ground and power supply are good, replace the ECU.

• If the output voltage is out of the specified, replace the vehicle-down sensor.

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6C17109813 C

1. ECU 4. ECU Main Fuse 15 A 7. Starter Relay

2. Ignition Switch 5. Vehicle-down Sensor 8. Battery