VOLVO
ECM-U000200 - High Speed CAN Communication Bus Performance. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
1 modelS60 (2011–)
Show models by year and engine (1)
What does this fault code mean?
The code concerns the performance of the high speed CAN network and is set when the engine control module (ECM) detects a serious disturbance in CAN communication. The fault may lie in the wiring, in the connections or in another control module on the same part of the network.
Possible causes
- Contact resistance or oxidation in the connections
- Open circuit in one of the CAN wires
- Short circuit between the CAN wires
- Internal fault in the ECM
- Internal fault in another control module on the same part of the CAN network
What you can do
- 1Read the codes also in the central electronic control module (CEM), which monitors the voltage on the CAN wires
- 2Check the connectors to the engine control module and to the other control modules on the CAN network for contact resistance, looseness and oxidation
- 3Gently shake the wires and pull lightly on the connectors during the check, since the breaks may come and go
- 4Use a multimeter to check that the CAN wires have no break and no short to each other
- 5Have a workshop measure the load on the CAN network and identify which control module is communicating wrongly
Symptoms you may notice1
- Check engine light comes on or behaves abnormally
What the fault can affect3
- The engine control module switches itself off on the network (bus-off)
- The engine control module stays off until the voltage supply has been broken
- When the voltage is switched on again, the engine control module makes new attempts to communicate
General guidance for car owners. Diagnosis on the car can point to a different cause.