DYNAMIC RADAR CRUISE CONTROL SYSTEM(for Mono Camera Type), Diagnostic DTC:U1104

DTC Code DTC Name
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

The driving support ECU assembly sends vehicle speed and vehicle condition information to the millimeter wave radar sensor assembly. The millimeter wave radar sensor assembly then sends information on the presence, distance, and relative speed of objects in front of the vehicle to the driving support ECU assembly. The driving support ECU assembly sends this information to the hybrid vehicle control ECU assembly and the hybrid vehicle control ECU assembly operates the dynamic radar cruise control system.

DTC No. Detection Item DTC Detection Condition Trouble Area
U1104 Lost Communication with Driving Support ECU

w/o Full-speed range following function:


  • While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 1 second.

w/ Full-speed range following function:


  • While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 1 second.

 Pre-collision system
Pattern

DTC output parts

(Tester Display)

 Trouble Area

Driving support ECU assembly

(Pre-Collision 2)

Forward Recognition Camera

(Front Recognition Camera)
U1104 U1104 U0235
Pattern 1 ○ ○ - Driving support ECU assembly
Pattern 2 ○ ○ ○ Forward recognition camera
Pattern 3 ○ - ○ Millimeter wave radar sensor assembly
Pattern 4 ○ - - Driving support ECU assembly

○: DTC output

-: DTC not output

PROCEDURE


  1. CHECK FOR PRE-COLLISION SYSTEM


    1. Check for pre-collision system.

      Click here

      Result
      Proceed to
      NEXT

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    END