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Last Modified: 11-27-2007 1.6 C
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: LX570 Doc ID: RM000003FEK000X
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DESCRIPTION (2008 LX570)

DTC

U0100

Communication Stop from ECM to Distance Control ECU, VSC

DTC

U0122

Lost Communication with Vehicle Dynamics Control Module

DTC

U0123

Lost Communication with Yaw Rate Sensor Module

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DTC

U1101

Lost Communication with Distance Control ECU

DESCRIPTION

This DTC is output when a communication malfunction occurs between the sensors and ECUs.

DTC Code

DTC Detection Condition

Trouble Area

U0100

The vehicle speed is 40 km/h (25 mph) or more with the cruise control main switch on (vehicle-to-vehicle distance control mode) and communication from the ECM to the distance control ECU stops.
  • Distance control ECU
  • CAN communication system
  • ECM

U0122

The vehicle speed is 40 km/h (25 mph) or more with the cruise control main switch on (vehicle-to-vehicle distance control mode) and communication from the master cylinder solenoid (skid control ECU) to the ECM stops.
  • Master cylinder solenoid (skid control ECU)
  • CAN communication system
  • ECM

U0123

While cruise control is in operation (vehicle-to-vehicle distance control mode), the data sent from the yaw rate sensor to the distance control ECU is abnormal.
  • Distance control ECU
  • Yaw rate sensor
  • CAN communication system
  • ECM

U0126

While cruise control is in operation (vehicle-to-vehicle distance control mode), the data sent from the steering angle sensor to the distance control ECU is abnormal.
  • Distance control ECU
  • Steering angle sensor
  • CAN communication system
  • ECM

U1101

The vehicle speed is 40 km/h (25 mph) or more with the cruise control main switch on (vehicle-to-vehicle distance control mode) and communication from the distance control ECU to the ECM stops.
  • Distance control ECU
  • CAN communication system
  • ECM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Use the Techstream to check if the CAN communication system is functioning normally NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING (2008 LX570) .

OK:

DTC is not output.

OK