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Home >> Toyota >> 2004 >> Land Cruiser >> Repair and Diagnosis >> External Pages >> Different car >> Section 471 (Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics)) >> Circuit Inspection >> DTC C1232/32: Deceleration Sensor Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Start the inspection from step  1 in case of using the hand-held tester and start from step  2 in case of not using the hand-held tester.

  1. Check output value of the yaw rate (deceleration) sensor. 

    PREPARATION: 

    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: 

      Check that the deceleration value of the deceleration sensor displayed on the hand-held tester is changing when tilting the vehicle.

      OK: 

      Deceleration value must be changing. 

    1. OK: Check and replace ABS & BA & TRAC & VSC ECU. 
    2. NG: Go to next step. 
  2. Check yaw rate (deceleration) sensor. 

    PREPARATION: 

    1. Connect 3 dry batteries of 1.5 V in series.
    2. Connect VYS terminal to the batteries' positive (+) terminal, and GYAW terminal to the batteries' negative (-) terminal. Apply about 4.5 V between VYS and GYAW terminals.
      NOTE: Do not apply voltage of 6 V or more to terminals VYS and GYAW.

      CHECK: 

      Check the output voltage of GL1 and GL2 terminals when the sensor is tilted forward and rearward.

      OK: 

      YAW RATE (DECELERATION) SENSOR TERMINALS OUTPUT VOLTAGE

      Symbols Condition Standard Value
      GL1 Horizontal About 2.3 V
      GL1 Lean rearward 1.0 V to about 2.3 V
      GL1 Lean forward About 2.3 V to 3.5 V
      GL2 Horizontal About 2.3 V
      GL2 Lean rearward About 2.3 V to 3.5 V
      GL2 Lean forward 1.0 V to about 2.3 V

      HINT:

      • If the sensor is tilted too much, it may show the wrong value.
      • If dropped, the sensor should be replaced with a new one.
      • The sensor removed from the vehicle should not be placed upside down.
        Fig 1: Checking Yaw Rate (Deceleration) Sensor
        G03070046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace yaw rate sensor. 
    2. OK: Go to next step. 
  3. Check for open or short circuit in harness and connector between yaw rate (deceleration) sensor and ABS & BA & TRAC & BA & VSC ECU (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
    1. NG: Repair or replace harness and connector. 
    2. OK: Check and replace ABS & BA & TRAC & VSC ECU. 
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