Possible Causes
- Purpose of the DTC
- To check CAN communication between powertrain control module and diesel exhaust fluid heater control unit
- Electrical cause
- Mechanical cause
- Control Module Cavity
- Circuit reference B_D_CANL3. Communication bus
- Circuit reference B_D_CANH3. Communication bus
- Monitor Description
- Communication error between powertrain control module and diesel exhaust fluid heater control unit
- Prioritised List of Possible Causes
- The powertrain control module has not received the expected CAN signal from the diesel exhaust fluid heater control unit/diesel sub net CAN within the specified time interval
- Diesel exhaust fluid heater control unit/diesel sub net CAN circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Connector is disconnected, connector pin is backed out, connector pin corrosion