The exhaust gas temperature sensors for exhaust gas aftertreatment
Proceed as follows: Check the circuit for the module for the exhaust gas temperature sensors.Check the connectors and electrical cables for CAN communication between the control unit EEC and the module for the exhaust gas temperature sensors.If the connectors and electrical cables seem to be intact, renew the module for the exhaust gas temperature sensors.Further information about the electrical cables and pins on the control unit to which the component is connected is available in SDP3 under the tab Check for the relevant component. See also the Workshop manual, section 03-35 Electronic control system, E67.There is a general description of the different troubleshooting methods for electrical faults in the Workshop Manual, subgroup 16-70.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The EEC control unit for exhaust gas aftertreatment has lost contact with the exhaust gas temperature sensors.
Possible causes: Electrical fault in the temperature sensors voltage supply.Fault in CAN communication between the EEC control unit and the module for the temperature sensors.Internal electrical fault in the module for the temperature sensors.