CTB DO148, Quick Start User Manual, Page: 6 / 12

6
CAN Test Box
4
Chassis
GND
5
Signal
GND
16
Batt+
POWER
CTB LED Monitoring
Establish CTB LED display by connecting the CTB cable DLC to the
vehicle DLC. Data signals present on the vehicle DLC will illuminate
the corresponding CTB panel LEDs.
Of primary importance is the illumination of CTB LEDs:
• CTB POWER (CTB is powered up)
• Batt+ (vehicle DLC Pin 16)
• Chassis GND (vehicle DLC Pin 4)
• Signal GND (vehicle DLC Pin 5)
• Appropriate LEDs for the CAN data protocol in use for the
vehicle being tested (use the pulsating LEDs to identify the CAN
protocol).
Image shows CTB LEDs; POWER,
4 (green), 5 (blue) 16 (red) ‘ON’
indicating power and ground
circuits are operational
Image shows CTB LED’s 6 (CAN
High) and 14 (CAN Low) - system
uses SAE J2284 protocol and is in
‘wake up’ mode
Test Vehicle Example - Mazda CX7