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.

Check for open and short circuit in harness and connector between yaw rate (deceleration) sensor and skid control ECU (See HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION ).
1. NG: Repair or replace harness or connector.
2. OK: Go to next step.

Check yaw rate (deceleration) sensor.

PREPARATION:

Connect 3 dry batteries of 1.5 V in series.

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 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
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Replace yaw rate sensor.
OK: Check and replace skid control ECU.