Inspection Procedure

1. See PRE-CHECK  .

1. Check if the DTC is output.

NO : NO PROBLEM 

YES : GO TO NEXT STEP 

1. Remove the console box and yaw rate sensor.
2. Connect 3 dry batteries of 1.5 V in series.
3. 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.
4. Check the output voltage of GL1 and GL2 terminals when the sensor is tilted forward and rearward.

   OK: 

   PROBLEM SYMPTOMS
   
   

   Symbols	Condition	Standard Value
   GL1	Horizontal	About 2.3 V
   GL1	Lean forward	0.4 - about 2.3 V
   GL1	Lean rearward	About 2.3 - 4.1 V
   GL2	Horizontal	About 2.3 V
   GL2	Lean forward	About 2.3 - 4.1 V
   GL2	Lean rearward	0.4 - about 2.3 V

   Fig 1: Inspecting Yawrate Sensor (Include Deceleration Sensor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • If the sensor is tilted too much to 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.

NG : REPLACE YAWRATE SENSOR(INCLUDE DECELERATION SENSOR) 

OK : GO TO NEXT STEP 

1. Check for open and short circuit in harness and connector between yaw rate sensor and skid control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : CHECK AND REPLACE SKID CONTROL ECU ASSY