Speed Sensor (Service Code 24)
Disconnect the speed sensor connector, and connect the
harness adapter [A] between the harness connector [B]
and speed sensor connector [C].
Connect a digital meter to the harness adapter leads.
Special Tool - Throttle Sensor Setting Adapter #1: 57001
Speed Sensor Output Voltage
Connections to Sensor
Meter (+) → Y lead [C]
Meter (–) → BK/Y lead [D]
Measure the sensor output voltage with the engine
stopped, and with the connector joined.
Turn the ignition switch ON.
Output Voltage at Sensor
Standard: About DC 0.05 ∼ 0.07 V
If you can rotate the drive shaft, the output voltage will
If the reading is out of the range, check the speed sensor
(see Speed Sensor Inspection in the Electrical System
chapter) and the wiring to ECU (see wiring diagram).
If the reading, speed sensor and wiring are good, replace
the ECU (see ECU Removal/Installation).
Speed Sensor Circuit
2. Meter Unit
3. Speed Sensor
4. Frame Ground
5. Battery 12 V 8 Ah
FUEL SYSTEM (DFI) 3-63