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Yaw Rate Sensor Communication Stop Mode: Procedure

  1. CHECK CAN BUS WIRE FOR DISCONNECTION (YAW RATE SENSOR BRANCH WIRE) 
    1. Turn the power switch off.
    2. Disconnect the yaw rate sensor connector.
      Fig 1: Identifying Yaw Rate Sensor Connector Terminals
      GTY222122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Front view of wire harness connector
      (to Yaw Rate Sensor)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L12-3 (CANH) - L12-2 (CANL) Power switch off 54 to 69 Ω

    NG → REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (YAW RATE SENSOR BRANCH WIRE) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying Yaw Rate Sensor Connector Terminals
      GTY230740Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      L12-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Callouts For Fig. 74

      *1 Front view of wire harness connector
      (to Yaw Rate Sensor)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) 
    1. Turn the power switch off.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying Yaw Rate Sensor Connector Terminals
      GTY230741Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      L12-1 (GND) - Body ground Always Below 1 Ω
      Callouts For Fig. 75

      *1 Front view of wire harness connector
      (to Yaw Rate Sensor)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

    OK → See step   4 

  4. REPLACE YAW RATE SENSOR. Refer to  REMOVAL