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Toyota Sienna Service Manual: Lost Communication with Cruise Control Front Distance Range Sensor

Toyota Sienna Service Manual / Cruise control / Dynamic laser cruise control system / Diagnostic trouble code chart / Lost Communication with Cruise Control Front Distance Range Sensor

DTC U0235 Lost Communication with Cruise Control Front Distance Range Sensor

DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

U0235

The ECM detects a communication error signal (from the laser sensor to the distance control ECU) for 0.15 sec. or more while the dynamic laser cruise control is in operation
  • Communication circuit
  •  Laser sensor
  •  Distance control ECU

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1 CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - LASER SENSOR)

 CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - LASER SENSOR)

  1. Disconnect the D2 distance control ECU connector and L1 laser sensor connector.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

2 CHECK DISTANCE CONTROL ECU

CHECK DISTANCE CONTROL ECU

  1. Reconnect the D2 distance control ECU connector.
  2. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

  1. Reconnect the L1 laser sensor connector

3 CHECK DTC OUTPUT

  1. Clear the DTCs.
  2.  Turn the ignition switch to the ON position.
  3.  Check if the same DTC is recorded

Result

Result

END (INTERMITTENT PROBLEM IS PRESENT)

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