General Information

Smart Cruise Control
C1623 CAN Time-out Steering Angle Sensor - General Information

Component Location





General Description

SCC (Smart Cruise Control) has additional function which helps to keep safety distance from the car ahead as compared with conventional ACC (Auto Cruise Control). SCC uses CAN communition to exchange information, which is required for control, with related ECU's and to receive input signal from SCC remote control switch and to transmit output signal to cluster. CAN communication type is communication speed is high speed CAN and two terminal resistance (120 Ohms) is connected in a line. SCC has a CAN controller to control signal exchange.

DTC Description

SCC sets this code when the messages from SAS was not received within the last 100 msec. System recovers to normal state if the message is received again.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data




Monitoring CAN HIGH and LOW simultaneously is important in monitoring CAN communication waveform. When CAN HIGH signal rise to 3.5 V and LOW signal drops to 1.5 V - voltage difference between HIGH and LOW signal is 2 V - at BUS IDLE state (DIGITAL "1") whose reference voltage is 2.5 V, "0" is recognized. Besides, comparing HIGH and LOW signal if opposite waveform is detected with the reference voltage of 2.5 V, Check if current cam signal transfers correctly. Continuous "0" signal above 6BIT means the occurence of error in CAN communication. 1BIT is easily distinguished as calculating the time when "SOF" (START OF FRAME) which notifies the start of frame occurs. Check if "0" signal above 6BIT is detected continuously when monitoring CAN communication waveform.