Climate Control

U1000 CAN COMM CIRCUIT





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




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Select "Self Diagnostic Result" mode of "HVAC" using CONSULT-.III
3. Check DTC.
Is DTC detected?
YES - SEE Diagnosis Procedure.
NO - Intermittent Incident.




Diagnosis Procedure
1.CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Trouble Diagnosis Flow Chart.
- INSPECTION END