BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1232/32; Stuck in Deceleration Sensor; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000001A6F006X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1232/32; Stuck in Deceleration Sensor; 2007 MY LX470 [08/2006 - ]

DTC

C1232/32

Stuck in Deceleration Sensor

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
C1232/32	Detection of either of the conditions 1. or 2.: At a vehicle speed of 6 mph (10 km/h) or more, when the condition that ECU terminal GL1 signal change range is less than 20 mV, and ECU terminal FL2 signal change range swings by 468 mV or more occurs for 30 sec. or more. At a vehicle speed of 6 mph (10 km/h) or more, when the condition that ECU terminal GL2 signal change range is less than 20 mV, and ECU terminal FL1 signal change range swings by 468 mV or more occurs for 30 sec. or more.	Deceleration sensor Deceleration sensor circuit

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

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

PROCEDURE

1.	READ VALUE USING INTELLIGENT TESTER (DECELERATION SENSOR)*1

(a) Check the DATA LIST for proper functioning of the deceleration sensor.

Skid control ECU assembly:

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.

REPLACE SKID CONTROL ECU ASSEMBLY

2.	INSPECT YAW RATE SENSOR (INCLUDE DECELERATION SENSOR)*2

(a) Remove the console box and deceleration sensor.

(b) Connect 3 dry cell batteries of 1.5 V in series.

(c) 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).

NOTICE:

Do not apply voltage of 6 V or more to terminals 8 ( VYS) and 5 (GYAW).

(d) Measure the voltage when the sensor is tilted forward and rearward.

Standard voltage:

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.

REPLACE YAW RATE SENSOR

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

REPAIR OR REPLACE HARNESS AND CONNECTOR

REPLACE SKID CONTROL ECU ASSEMBLY