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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Abs With EBD & BA & TRAC & VSC System - Diagnostics >> Circuit Inspection >> DTC C0371/55 Yaw Rate Sensor Circuit >> Inspection Procedure

Inspection Procedure

NOTE:

Start the inspection from step  1 in case of using the hand-held tester and start from step  4 in case of not using the hand-held tester.

  1. Check output value of the yaw rate sensor  .
    1. Remove the 2 nuts and yaw rate sensor with connector still connected.
    2. Connect the hand-held tester to the DLC3.
    3. Turn the ignition switch ON and push the hand-held tester main switch ON.
    4. Select the DATALIST mode on the hand-held tester.

    Check that the yaw rate value of the yaw rate sensor displayed on the hand-held tester is changing: Place the yaw rate sensor vertically to the ground and turn the sensor pivoted on its center.

    Fig 1: Testing Yaw Rate Sensor
    G01081200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Yaw rate value must be changing  .

    1. OK: Go to next step  .
    2. NG: Go to step   4  .

  2. Check the steering angle sensor zero point  .
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester main switch ON.
    3. Select the DATALIST mode on the hand-held tester.

    Check whether steering angle sensor value is nearly equal to 0 degree when steering wheel is adjusted to neutral.

    1. OK: Go to next step  .
    2. NG: Calibrate the steering angle sensor zero point. See step   3  under PRE-CHECK  .

  3. Check whether continuity exists between terminal YD of yaw rate sensor and terminal YD of Skid Control ECU  .
    1. OK: Check and replace Skid Control ECU  .
    2. NG: Repair or replace harness or connector  .
  4. Check yaw rate sensor  .
    1. Turn the ignition switch ON.
    2. Measure the voltage between terminals IGA (3) and GYW2 (1), YAW2 (4) and GYW2 (1) of the yaw rate sensor with connector still connected.
      Fig 2: Testing Yaw Rate Sensor Voltages
      G01081202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: See  Fig 3  .

    Fig 3: Yaw Rate Sensor Voltage Specifications
    G01081201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to next step  .
    2. NG: Replace yaw rate sensor  .
  5. Check for open and short circuit in harness and connector between yaw rate sensor and Skid Control ECU. See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  .
    1. OK: Check and replace Skid Control ECU  .
    2. NG: Repair or replace harness or connector  .
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