DIS2 node: timeout in CAN communication.
• Check the DIS2 for DTCs. • If DTCs cannot be read from the DIS2: - Check CAN connection to DIS2 unit. - Check power supply and ignition signal to the DIS2. • Check wiring and connectors for the environment sensor CAN bus. • Measure the resistance (with the battery disconnected) between pins B5 and B14. It should be approximately 60 ohm (one 120 ohm termination resistor in each end of the CAN-bus). If all connected ECUs on the sensor CAN-bus present timeout error codes • Measure the resistance (with the battery disconnected) between CAN-high (pin B5) and supply. It should be high ohmic (Mega ohm). • Measure the resistance (with the battery disconnected) between CAN-low (pin B14) and ground. It should be high ohmic (Mega ohm). • Disconnect the other ECU units one at the time from the CAN bus and check if the remaining ECU timeout error codes disappear.
What you'll see
• Adaptive Cruise Control disabled and Advanced Emergency Brake disabled.
System reaction
Amber AEB malfunction Amber Cruise Control malfunc.
Diagnostic depth
The DTC is set if there is a timeout in the CAN communication with the DIS2 node.
• Faulty DIS2 unit • DIS2 unit disconnected from the evironment sensor CAN bus If all connected ECUs on the sensor CAN-bus present timeout error codes the cause might be: • Defect wiring : - Short circuit between CAN-high and supply voltage. - Short circuit between CAN-low and ground. • Defect ECU unit(s) on the environment sensor CAN bus.