DTC B12A6-12: Auxiliary Heater Water Pump - Circuit short to battery: Action
WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- The fuel fired booster heater contains many serviceable components. It should not be necessary to install a new fuel fired booster heater to rectify this fault.
- To check the operation of the fuel fired booster heater, perform routine - Auxiliary Heater (AHCM) Activation Test (0x900A). Repeat the routine if excessive smoke is emitted from the fuel fired booster heater exhaust.
- Refer to the appropriate SYSTEM WIRING DIAGRAMS information and check the fuel fired booster heater coolant pump circuit for short circuit to power. Repair the wiring harness as necessary