Service Manual (KLZ1000C) — page 650 of 762

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17-48 SELF-DIAGNOSIS SYSTEM
Front Wheel Rotation Sensor Signal (Service Code 27) (DTC P0500)
Front Wheel Rotation Sensor Signal Inspection
○The front wheel rotation sensor sends the signal to the
  ECU through the ABS hydraulic unit.
○The service code 27 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 27 and following service codes
  (for ABS) are displayed at the same time, inspect the front
  wheel rotation sensor.
   Service Code B42 (see Front Wheel Rotation Sensor
   Signal Abnormal (Service Code B42)(17-89))
   Service Code B43 (see Front Wheel Rotation Sensor
   Wiring Inspection (Service Code B43)(17-90))

• When  only service code 27 is displayed, do the following
  inspection procedures.
• Disconnect:
    ECU Connectors (see ECU Removal(3-38))
   Front Wheel Rotation Sensor Lead Connector (see Front
   Wheel Rotation Sensor Removal(12-47))
   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 103 [C] ← → ABS Hydraulic Unit
        Terminal 8 [D]

  Wiring Continuity Inspection
   ABS Hydraulic Unit Connector [A] ← →
      Front Wheel Rotation Sensor Connector [B]
        ABS Hydraulic Unit Terminal 12 [C] ← → Sensor
        Terminal [D]
        ABS Hydraulic Unit Terminal 3 [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.