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 CAN bus. • Measure the resistance (with the battery disconnected) between pins B6 and B15. It should be approximately 60 ohm (one 120 ohm termination resistor in each end of the CAN-bus). • Measure the resistance (with the battery disconnected) between CAN-high (pin B6) and supply. It should be high ohmic (Mega ohm). • Measure the resistance (with the battery disconnected) between CAN-low (pin B15) 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
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The DTC is set active if the CAN-message GeneralInfoDISProp has been absent for 300 ms on the CAN bus. The DTC is set to inactive if the CAN-message GeneralInfoDISProp is received. The DTC is not set in the following cases: • Ignition is turned off • First 2 seconds after ignition on • System voltage is below 22 volt • System voltage is above 30 volt
• 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 CAN bus.