HEA-822

Diagnostic Trouble Code (DTC) Information

Condition







A diagnostic trouble code (DTC) is stored if there is a short-circuit to ground or an open-circuit in the water pump circuit.

Condition

- Any engine block heater function will be shut down.

Possible source

- Contact resistance in control module or water pump connectors.
- Short-circuit to ground in signal cable.
- Open-circuit in power cable.
- Open-circuit in the signal cable.
- Defective water pump.

Condition

- Engine block heater not working.
- Poor heating in passenger compartment.