CTB DO148, Quick Start User Manual, Page: 9 / 12

9
CAN Test Box
CTB Oscilloscope Connection
Connect the CTB cable DLC to the vehicle DLC.
Connect one end of a CTB probe lead (BNC) to the oscilloscope.
Connect the opposite end of the probe (4 mm jack) to the CTB Pin
Port of the appropriate CTB LED selected for oscilloscope waveform
data capture.
Connect the probe ground (black lead) to CTB LED Pin Port either 4
(Chassis GND) or 5 (Signal GND).
Power up the oscilloscope and set up the system as necessary for
signal data gathering. Use 2 channels to observe CAN High and CAN
Low signal data.
CTB Probe (4 mm) Connection
PC oscilloscope shown with CTB-to-scope
connections and waveform capture
CTB Connected to Vehicle DLC
CTB Probe Lead (BNC) Scope
Connection
Oscilloscope Waveform Capture