Speed Sensor (Service Code 24)
Speed Sensor Output Voltage Inspection
Using the jack, raise the rear wheel off the ground (see
Rear Wheel Removal in the Wheels/Tires chapter).
Special Tool - Jack: 57001-1238
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
speed sensor measuring adapter [A] between these con-
nectors as shown.
Main Harness [B]
Speed Sensor [C]
Special Tool - Speed Sensor Measuring Adapter: 57001
Speed Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → BL/Y (main harness LG/R) lead
Digital Meter (–) → BK/Y (main harness BR/Y) lead
Measure the output voltage with the engine stopped and
with the connector joined.
Turn the ignition switch ON.
About DC 0.05 ∼ 0.09 V or DC 4.5 ∼ 4.9 V at
ignition switch ON and 0 km/h
Rotate the rear wheel by hand, confirm the output volt-
age will be raise or lower.
Turn the ignition switch OFF.
If the reading is out of the standard, replace the sensor.
If the reading is within the standard, remove the ECU and
check the wiring for continuity between main harness con-
Special Tool - Hand Tester: 57001-1394
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Speed Sensor Connector [B]
LG/R lead (ECU terminal 39) [C]
BR/Y lead (ECU terminal 55) [D]
If the wiring is 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) 3-61