Home › Brake › Brake Control/Dynamic Control System › BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM
Last Modified: 11-27-2007 1.6 C
Service Category: Brake Section: Brake Control/Dynamic Control System
Model Year: 2008 Model: LX570 Doc ID: RM000001DXS00JX
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570)

DTC

C1337/37

Different Diameter Tire Malfunction

DESCRIPTION

The skid control ECU measures the speed of each wheel by receiving signals from the speed sensor. These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must be equal.

DTC Code

DTC Detection Condition

Trouble Area

C1337/37

When either of the following conditions is detected:

  • The diameter is different between the 2 front wheels and the 2 rear wheels.
  • There is a wheel speed sensor fault.
  • Speed sensor
  • Speed sensor rotor
  • Speed sensor circuit
  • Tire size

INSPECTION PROCEDURE

NOTICE:

When replacing the master cylinder solenoid, perform zero point calibration BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION (2008 LX570) .

PROCEDURE

1.

CHECK TIRE SIZE

(a) Check tire size and condition of all 4 wheels.

OK:

Condition of all 4 wheels is normal and tire size is same.

OK

2.

INSPECT SPEED SENSOR ROTOR

(a) Check the front speed sensor rotors BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) and rear speed sensor rotors BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) .

Result

Result

Proceed to

OK

A

NG

Front speed sensor

B

Rear speed sensor

C
A

3.

INSPECT SPEED SENSOR

(a) Check the front speed sensor circuit BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) and rear speed sensor circuit BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) .

Result

Result

Proceed to

OK

A

NG

Front speed sensor

B

Rear speed sensor

C
A

4.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SPEED SENSOR)

(a) Check the front speed sensor circuit BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) and rear speed sensor circuit BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570) .

OK

5.

RECONFIRM DTC

(a) Clear the DTCs BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

(b) Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.

(c) Check if the same DTCs are output BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

HINT:

Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result

Result

Proceed to

DTC is output.

A

DTC is not output.

B
A