Communication with the main coordinator
If communication with the engine control unit also has been interrupted (fault code 5100 has been set), carry out the following: Check the CAN bus circuit for open circuit or any misconnection.Measure the resistance between coordinator pin 45 and 21. Correct value should be 60 ohm. If fault code 5100 is not set, the fault probably is on the main coordinator. Check whether the main coordinator also sets any fault codes.Check that the main coordinator is correctly connected and that it is the correct type. Make sure the power supply functions.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Communication with the main coordinator has been interrupted.
The fault may be due to: Open circuit in the CAN bus.The cables for CAN High and CAN Low have been mixed up.The main coordinator has been disconnected.