EMS immo: CAN timeout in communication with EMS immo unit.
• Check status of the immobilizer function with ImmoLasTools • Check the EMS for DTCs • If DTCs can not be read from the EMS: - check CAN connection to EMS unit - check power supply and ignition signal to the EMS • Check wiring and connectors for the red CAN-bus • Measure the resistance (with the battery disconnected) between pins B1 and B10. It should be 60 ohm (one 120 ohm termination resistor in each end of the CAN-bus).
What you'll see
• Not possible to start engine.
System reaction
Amber IMMO Active
Diagnostic depth
Immobilizer failure. Communication with the Engine Management System (EMS) interrupted during immobilizer validation.
• Faulty EMS unit • Open circuit on the red CAN bus • The immobilizer function in the EMS unit is not correctly locked to the COO - spare part unit, which has not been programmed/configured - unit transferred from another vehicle • The immobilizer function in the COO unit is not correctly locked to the EMS - spare part unit, which has not been programmed/configured - unit transferred from another vehicle