Cruise Control

U1000 CAN COMM CIRCUIT

Description


CAN COMMUNICATION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control units, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to "CAN Communication Signal Chart" CAN Communication Signal Chart.


DTC Logic


DTC DETECTION LOGIC






NOTE:
If "U1000" is detected, first diagnose the CAN communication system.


Diagnosis Procedure


1. PERFORM THE SELF-DIAGNOSIS

1.Turn the ignition switch ON.
2.Turn the MAIN switch of ICC system ON, and then wait for 2 seconds or more.
3.Perform "All DTC Reading" with CONSULT.
4.Check if the "U1000" is detected as the current malfunction in "Self Diagnostic Result" of "ICC/ADAS".
Is "U1000" detected as the current malfunction?
YES- Refer to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
NO- Refer to "Intermittent Incident" Intermittent Incident.


Special Repair Requirement


DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following operation is performed.
- Removal and installation of ICC sensor integrated unit
- Replacement of ICC sensor integrated unit

SPECIAL REPAIR REQUIREMENT


1. LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to "LASER BEAM AIMING ADJUSTMENT : Description" Description.
- GO TO 2.

2. CHECK ICC SYSTEM

1.Erase the "Self Diagnostic Result", and then perform "All DTC Reading" again after performing the action test. (Refer to "ACTION TEST : Description" Description for action test.)
2.Check that the ICC system is normal.
- WORK END