Vehicle-down Sensor (Service Code 31)

_• Remove the sensor (see Vehicle-down Sensor Removal).

_• 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 [E] Meter (–) → BR/BK lead [F]

_• Hold the sensor vertically.

_• Turn the ignition switch ON, and measure the output volt-

age 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.

Output Voltage at Sensor

Standard: with sensor tilted 60  70° or more right or left: 0.65  1.35 V

with sensor arrow mark pointed up: 3.55  4.45 V

NOTE

○^{If you need to test again, turn the ignition switch OFF,}

and then ON.

_• Turn the ignition switch OFF.

_• Remove the needle adapter set, and apply silicone

sealant to the seals of the connector for waterproofing.

Sealant - Kawasaki Bond (Silicone Sealant): 56019-120

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 Power Supply Inspection).

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

Vehicle-down Sensor Circuit

1. ECU

2. Water-proof Joint E

3. Vehicle-down Sensor

4. Water-proof Joint D

Subthrottle Sensor Removal/Adjustment

Subthrottle Sensor Input Voltage Inspection

NOTE

○^{Be sure the battery is fully charged.}

_• Remove the air cleaner housing (see Air Cleaner Housing Removal).

_• Turn the ignition switch OFF.

_• Disconnect the subthrottle sensor connector and connect

the harness adapter [A] between these connectors.

_• Connect a digital meter to the harness adapter lead.

Special Tool - Throttle Sensor Harness Adapter: 57001

-1400

_• Measure the sensor input voltage with the engine stopped and with the connector joined.

_• Turn the ignition switch ON.

Subthrottle Sensor Input Voltage Connections to Adapter

Meter (+) → BL (sensor BL) lead Meter (–) → BK (sensor BR/BK) lead

Standard: 4.75  5.25 V DC

_• Turn the ignition switch OFF.

If the input voltage is normal, check the sensor output

voltage.

If the input voltage is less than the standard, remove the ECU and check the wiring between these connectors.

○^{Disconnect the ECU and sensor connectors.}

Wiring Connection

ECU Connector [A] ←→

Subthrottle Sensor Connector [B] BL lead (terminal 10)

BR/BK lead (terminal 28)

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

Subthrottle Sensor Output Voltage Inspection

_• Remove the air cleaner housing (see Air Cleaner Housing Removal).

_• Measure the output voltage at the subthrottle sensor in

the same way as input voltage inspection. Note the fol-

lowing.

_• Disconnect the subthrottle sensor connector and (black) connect the harness adapter [A] between these connec-

tors.

Special Tool - Throttle Sensor Harness Adapter: 57001

-1400

_• Measure the output voltage of the sensor with the engine stopped, and with the connector joined.

_• Turn the ignition switch ON.

_• Measure the output voltage when the subthrottle valve is

fully opened or completely closed by hand.

Subthrottle Sensor Output Voltage Connections to Adapter

Meter (+) → Y (sensor BL/W) lead Meter (–) → BK (sensor BR/BK) lead

Standard:

0.4  0.6 V DC (at idle throttle opening) 3.625  3.775 V DC (at full throttle opening)

If the output voltage is out of the standard, inspect the subthrottle sensor resistance.

If the output voltage is normal, check the wiring for conti- nuity.

Wiring Connection

ECU Connector [A] ←→

Subthrottle Sensor Connector [B] BL/W lead (terminal 24)

BR/BK lead (terminal 28)

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

Subthrottle Sensor Resistance Inspection

_• Turn the ignition switch OFF.

_• Disconnect the subthrottle sensor connector.

_• Connect a digital meter [A] to the subthrottle sensor con-

nector [B].

_• Measure the subthrottle sensor resistance.

Throttle Sensor Resistance

Connections: BL lead [C] ←→ BK lead [D] Standard: 4  6 kΩ

If the reading is out of the range, replace the throttle body assy.

If the reading is within the range, but the problem still exists, replace the ECU (see ECU Removal/Installation).

Subthrottle Sensor Circuit

1. ECU

2. Water-proof Joint E

3. Water-proof Joint D

4. Subthrottle Sensor