(Solved) MB Star C4 no ignition during Self-test
I had myself own a 2009 Mercedes Benz GL 350 CDI X164 model. I have hooked up my newly got MB Star C4 diagnostic system to do self-test on my second-hand Dell 630 win xp laptop. But I chose wrong vehicle X166 model by mistake and the device failed to communicate with my vehicle and computer. Besides, there was no ignition signal detected. But the self-test result shows the car was not being started, but actually, my car was started.
I managed to get the Star C4 device back to work but it just failed to do so. The device put me into a dilemma. I had to turn to help at mbstarshop technical service.
Here is the solution:
Unwrapped the wiring loom to the diagnostic plug in the car. I was told to identify the total 5 wires. Pin 4 and 5 wires are brown wires, Pin 6 is gray with a white stripe, Pin 14 is gray and Pin 16 is red color. That indicates C4 supports CAN BUS protocol.
Please check all the ignition on the device are definitely on, and enter the VIN number by hand. In that case, Star C4 is ready to read the vehicle automatically. It identified a malfunctioning wheel sensor, and I was able to read the transmission oil temperature.
I want to give a little advice to those who already have Compact C4 or ready to get one: Please confirm your vehicle model protocol and select exactly correct vehicle model to avoid such problem.
Relate article: 2015 MB Star Compact C4 HDD Activation Guide