3-56 FUEL SYSTEM (DFI)

Speed Sensor (Service Code 24, 25)

Speed• Sensor Removal/Installation

See the Switches and Sensors section in the Electrical System chapter.

Speed• Sensor Inspection

See the Switches and Sensors section in the Electrical

System chapter.

Input Voltage Inspection

NOTE

○Be sure the battery is fully charged.

•Turn the ignition switch OFF.

•Disconnect the speed sensor connector [A] and connect the harness adapter [B] between the harness connector and speed sensor connector.

• Engine Sprocket Cover [C]

Connect a digital meter to the harness adapter leads.

Special Tool - Throttle Sensor Setting Adapter:

• 57001–1400

Measure the sensor input voltage with the engine

•stopped, and with the connector joined. Turn the ignition switch ON.

Speed Sensor Input Voltage Connection to Adapter

Meter (+) → BL (sensor P) lead [C] Meter (−) → BK/BL (sensor BK) lead [D]

Standard: About 9 11 V DC at Ignition SW ON

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

•If the reading is good, check the output voltage. Turn the ignition switch OFF.

Output• Voltage Inspection

Before this inspection, inspect the input voltage (see Input

Voltage Inspection).

NOTE

○Be sure the battery is fully charged.

•Turn the ignition switch OFF.

FUEL SYSTEM (DFI) 3-57

Speed Sensor (Service Code 24, 25)

•Disconnect the speed sensor connector [A] and connect the harness adapter [B] between the harness connector and speed sensor connector.

• Engine Sprocket Cover [C]

Connect a digital meter to the harness adapter leads.

Special Tool - Throttle Sensor Setting Adapter:

• 57001–1400

Measure the sensor output voltage with the engine

•stopped, and with the connector joined. Turn the ignition switch ON.

Speed Sensor Output Voltage at Sensor Connections to Adapter

Meter (+) → Y/W (sensor Y) lead [C] Meter (–) → BK/BL (sensor BK) lead [D]

Standard: About 0.05 0.07 V DC

NOTE

○If you rotate the engine sprocket, the output voltage will be increased.

If the reading is out of the range, check the speed sensor operation (see Electrical System chapter) and the wiring to ECU (see wiring diagram in this section).

If the reading, speed sensor operation and wiring are good, check the ECU for its ground, and power supply (see ECU section).