Absence of communication on the Orange CAN-bus.
• Check connector for the Orange CAN-bus on CMS (pin B29 and B32). • Check wiring for Orange CAN-bus: o Measure the resistance (with the battery disconnected) between CANhigh (pin B29) and CAN-low (pin B32). It should be close to 60 ohm when all units are connected (one 120 ohm termination resistor in each end of the CAN-bus). o Measure the resistance (with the battery disconnected) between CANhigh on CMS (pin B29) and CAN-high on any other unit on the Orange CAN-bus. It should be close to zero ohm. o Measure the resistance (with the battery disconnected) between CANlow on CMS (pin B32) and CAN-low on any other unit on the Orange CAN-bus. It should be close to zero ohm. • Check wiring and connector for the ignition signal (pin B38) on the CMS.
What you'll see
No driver-visible symptom recorded.
System reaction
Functions that depend on information from Orange CAN bus are degraded. Examples listed below: • ELC functions • Diff lock functions • Fuel-estimation functions
Diagnostic depth
Communication error. The CAN-controller of the Orange CAN-bus has entered state bus-off. There is a short circuit on the Orange CAN-bus
Defect wiring of Orange CAN-bus: • short circuit between CAN-high and CAN-low. • short circuit between CAN-high and supply voltage. • short circuit between CAN-high and ground. • short circuit between CAN-low and supply voltage. • short circuit between CAN-low and ground. Defect ECU unit(s) on the Orange CAN-bus.