FUEL SYSTEM (DFI) 3-67

Speed Sensor (Service Code 24)

Speed Sensor Removal/Installation

•Refer to the Speed Sensor Removal/Installation in the Electrical System chapter.

Speed Sensor Inspection

•Refer to the Speed Sensor Inspection in the Electrical System chapter.

Speed Sensor Input Voltage Inspection

NOTE

○Be sure the battery is fully charged.

•Turn the ignition switch OFF.

•Remove the fuel tank (see Fuel Tank Removal).

•Disconnect the speed sensor connector [A].

•Connect the harness adapter [A] between the main harness connector and speed sensor connector.

Special Tool - Throttle Sensor Setting Adapter #1: 57001 -1400

•Connect a digital meter to the harness adapter leads.

Speed Sensor Input Voltage Connections to Adapter:

Digital Meter (+) → BL (sensor P) lead Digital Meter (–) → BK/BL (sensor BK) lead

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

•Turn the ignition switch ON.

Input Voltage

Standard: DC 9 11 V

•Turn the ignition switch OFF.

If the reading is within the standard, check the output voltage (see Speed Sensor Output Voltage Inspection).

If the reading is out of the range, check the wiring (see wiring diagram in this section) and meter unit (see Meter Unit Inspection in the Electrical System chapter).

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

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

3-68 FUEL SYSTEM (DFI)

Speed Sensor (Service Code 24)

Speed Sensor Output Voltage Inspection

•Raise the rear wheel off the ground with the stand.

•Measure the output voltage at the speed sensor in the same way as input voltage inspection, note the following.

○Disconnect the speed sensor connector and connect the harness adapter [A] between these connectors.

Special Tool - Throttle Sensor Setting Adapter #1: 57001 -1400

Speed Sensor Output Voltage Connections to Adapter:

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

•Measure the output voltage with the engine stopped and with the connector joined.

•Turn the ignition switch ON.

Output Voltage

Standard: About DC 0.05 0.09 V or DC 4.5 4.9 V at ignition switch ON and 0 km/h

NOTE

○Rotate the rear wheel by hand, confirm the output voltage will be raise or lower.

•Turn the ignition switch OFF.

If the reading is out of the standard, check the wiring (see wiring diagram in this section) and speed sensor (see Speed Sensor Inspection in the Electrical System chapter).

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

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

FUEL SYSTEM (DFI) 3-69

Speed Sensor (Service Code 24)

Speed Sensor Circuit

1.Meter Unit

2.Speed Sensor

3.ECU

4.Frame Ground