Dynamic Radar Cruise Control System

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U0235: Lost Communication with Cruise Control Front Distance Range Sensor
U0235 - Lost Communication with Cruise Control Front Distance Range Sensor

DESCRIPTION

The millimeter wave radar sensor and distance control ECU transmit the data for general vehicle control and diagnosis function along the communication line. The millimeter wave radar sensor transmits information about the vehicle in front to the distance control ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the distance control ECU is replaced with a new one, initialization must be performed Installation.
* When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed Adjustments.
PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - MILLIMETER WAVE RADAR SENSOR)

(a) Disconnect the distance control ECU and millimeter wave radar sensor connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (MILLIMETER RADAR SENSOR - DISTANCE CONTROL ECU - BODY GROUND)

(a) Disconnect the distance control ECU and millimeter wave radar sensor connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK DISTANCE CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





NG -- REPLACE DISTANCE CONTROL ECU
OK -- Continue to next step.

4. REPLACE MILLIMETER WAVE RADAR SENSOR

(a) Replace the millimeter wave radar sensor.

(b) Adjust the millimeter wave radar sensor Adjustments.

NEXT -- Continue to next step.

5. CHECK DTC OUTPUT

(a) Clear the DTC.

(b) Turn the cruise control main switch on.

(c) Drive the vehicle at a speed for which cruise control operation is possible.

(d) Check if the same DTC is recorded.

Result:





B -- REPLACE DISTANCE CONTROL ECU

A -- END (INTERMITTENT PROBLEM IS PRESENT)