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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Brakes - Abs With VSC (Diagnostics)) >> Vehicle Stability Control System >> DTC C1244/44: Open or Short in Deceleration Sensor Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

When using the intelligent tester, start from  1. When not using the intelligent tester, start from  2.

  1. READ VALUE OF INTELLIGENT TESTER (DECELERATION SENSOR) 
    1. Check the DATA LIST for proper functioning of the deceleration sensor.

      Skid control ECU assembly 

      DATA LIST

      Item Measurement Item / Range (Display) Normal Condition Diagnostic Note
      DECELERAT SENS G sensor (GL1 filter) / Min.: -1.869 G, Max.: 1.869 Approximately 0 +- 0.13 G when vehicle is stationary Reading changes when vehicle is bounced
      DECELERAT SENS2 G sensor (GL2 filter) / Min.: -1.869 G, Max.: 1.869 Approximately 0 +- 0.13 G when vehicle is stationary Reading changes when vehicle is bounced

      OK: Deceleration value changes. 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY 

    NG: GO TO NEXT STEP 

  2. INSPECT YAW RATE SENSOR (INCLUDE DECELERATION SENSOR) 
    1. Remove the console box and deceleration sensor.
    2. Connect 3 dry cell batteries of 1.5 V in series.
    3. Connect terminal 8 (VYS) to the batteries' positive (+) terminal and terminal 5 (GYAW) to the batteries' negative (-) terminal. Apply about 4.5 V between terminals 8 (VYS) and 5 (GYAW).
      NOTE: Do not apply voltage of 6 V or more to terminals 8 (VYS) and 5 (GYAW).
    4. Measure the voltage when the sensor is tilted forward and rearward.

      Standard voltage 

      Fig 1: Inspecting Yaw Rate Sensor (Including Deceleration Sensor)
      G04440355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Sensor Condition Specified Condition
      4 (GL1) - Battery's negative (-) terminal Horizontal Approximately 2.3 V
      4 (GL1) - Battery's negative (-) terminal Lean forward 2.3 to 3.5 V
      4 (GL1) - Battery's negative (-) terminal Lean rearward 1.0 to 2.3 V
      2 (GL2) - Battery's negative (-) terminal Horizontal Approximately 2.3 V
      2 (GL2) - Battery's negative (-) terminal Lean forward 1.0 to 2.3 V
      2 (GL2) - Battery's negative (-) terminal Lean rearward 2.3 to 3.5 V

      HINT:

      • If the sensor is tilted too much, it may output the wrong value.
      • The sensor removed from the vehicle body should not be placed upside down.

    NG: REPLACE YAW RATE SENSOR 

    OK: GO TO NEXT STEP 

  3. CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - YAW RATE SENSOR) 

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY 

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