Service Manual (KLZ1000C) — page 645 of 762

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SELF-DIAGNOSIS SYSTEM 17-43
Rear Wheel Rotation Sensor Signal (Service Code 24) (DTC P2158)
Rear Wheel Rotation Sensor Signal Inspection
○The rear wheel rotation sensor sends the signal to the
    ECU through the ABS hydraulic unit.
○The ECU uses the rear wheel rotation sensor signal for
 motorcycle speed.
○The service code 24 is detected with the ECU.
•Inspect the wheel rotation sensor air gap (see Wheel Ro-
 tation Sensor Air Gap Inspection(12-50)).
•Inspect the wheel rotation sensor rotor (see Wheel Rota-
 tion Sensor Rotor Inspection(12-51)).
•When the service code 24 and following service codes
 (for ABS) are displayed at the same time, inspect the rear
 wheel rotation sensor.
   Service Code B44 (see Rear Wheel Rotation Sensor
   Signal Abnormal (Service Code B44)(17-90))
   Service Code B45 (see Rear Wheel Rotation Sensor
   Wiring Inspection (Service Code B45)(17-91))

• When  only service code 24 is displayed, do the following
  inspection procedures.
• Disconnect:
    ECU Connectors (see ECU Removal(3-38))
     Rear Wheel Rotation Sensor Lead Connector (see Rear
     Wheel Rotation Sensor Removal(12-48))
     ABS Hydraulic Unit Connector (see ABS Hydraulic Unit
     Removal(12-45))

• Check
  tors.
        the wiring for continuity between harness connec-

    Wiring Continuity Inspection
     ECU Connector [A] ← →
        ABS Hydraulic Unit Connector [B]
          ECU Terminal 102 [C] ← → ABS Hydraulic Unit
          Terminal 16 [D]

    Wiring Continuity Inspection
     ABS Hydraulic Unit Connector [A] ← →
        Rear Wheel Rotation Sensor Connector [B]
          ABS Hydraulic Unit Terminal 14 [C] ← → Sensor
          Terminal [D]
          ABS Hydraulic Unit Terminal 13 [E] ← → Sensor
          Terminal [F]

    If the wiring is good, check the ECU for its ground and
    power supply (see ECU Power Supply Inspection(3-39)).
    If the ground and power supply are good, replace the
    ECU.