Communication with the engine control unit
â–¶ How to fix
Check the CAN bus circuit for an open circuit or any mixed-up connections.Measure the resistance between coordinator pin 45 and 21. Correct value should be 60 ohm.Check the engine control unit supply voltage circuit for short circuit or open circuit.Check also whether the engine control unit has generated any fault codes.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Communication between the coordinator and engine control unit has been interrupted.
Possible cause
The fault may be due to: Open circuit in the CAN bus circuit.Misconnected cables for CAN High and CAN Low.Short circuit or open circuit in the engine control unit power supply circuit.