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3-68 FUEL SYSTEM (DFI)
Rear Wheel Rotation Sensor Signal (Service Code 24, 25)
Rear Wheel Rotation Sensor Signal Inspection
The rear wheel rotation sensor sends the signal to the
ECU through the ABS hydraulic unit (ABS equipped mod-
els). For other than ABS equipped models, the signal is
sent directly to the ECU.
The ECU uses the rear wheel rotation sensor signal for
motorcycle speed.
The service code 24 and 25 are detected with the ECU.
•
Inspect the wheel rotation sensor air gap (see Wheel Ro-
tation Sensor Air Gap Inspection in the Brakes chapter).
•
Inspect the wheel rotation sensor rotor (see Wheel Rota-
tion Sensor Rotor Inspection in the Brakes chapter).
•
When service code 24 and 25 are displayed, do the fol-
lowing inspection procedures.
•
Disconnect:
ECU Connectors (see ECU Removal in the Fuel System
(DFI) chapter)
Rear Wheel Rotation Sensor Lead Connector
ABS Hydraulic Unit Connector (see ABS Hydraulic Unit
Removal in the Brakes chapter)
•
For ABS equipped models, check the wiring for continuity
between harness connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
ABS Hydraulic Unit Connector [B]
R/Y lead (ECU terminal 21, ABS Hydraulic Unit
terminal 16) [C]
Wiring Continuity Inspection
ABS Hydraulic Unit Connector [A] ←→
Rear Wheel Rotation Sensor Connector [B]
BK/O lead (ABS Hydraulic Unit Connector terminal
14) [C]
W/G lead (ABS Hydraulic Unit Connector terminal
13) [D]
•
For other than ABS equipped models, check the wiring
for continuity between harness connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Rear Wheel Rotation Sensor Connector [B]
W/G lead (ECU terminal 32) [C]
BK/O lead (ECU terminal 20) [D]
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