Inspection Procedure

WARNING: This page is about a different car, the 2007 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.

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 REFERENCE CHART

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

INSPECT YAW RATE SENSOR (INCLUDE DECELERATION SENSOR)*2

Remove the console box and deceleration sensor.
Connect 3 dry cell batteries of 1.5 V in series.
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).
Measure the voltage when the sensor is tilted forward and rearward.

Fig 1: Stuck In Deceleration Sensor Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

VOLTAGE CHART

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

CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - YAW RATE SENSOR)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SKID CONTROL ECU ASSEMBLY