Unlock Evoque HV Coolant Heater with Autel MaxiSys

Symptoms:

No heat through vents, this was a Hybrid Evoque and I found that there was hot air when the engine was running and there was a fault stored with PTC heater 1 No operation. 

Fault code: B1DC5-93

Possible cause:

HV coolant heater is locked due to a previous overheating even.

Possible solution:

Unlocking the HV coolant heater via diagnostic procedure.

DDTSB had a document explaining that these heaters can be turned back on or "Unlocked" using diagnostic tool. After following this recommendation the result was that there was a fault with the heater and could not be turned on and also it needs replaced.

The parts department reported back that he was Informed that this  was a high failure rate component , I fitted the part and the car was fixed.

Unlock coolant heater procedure:

Attach a battery charger to the 12V battery

Connect a diagnostic tool (i.e Autel MaxiSys Ultra)

Select HAVC control module

Select the function HV coolant heater unlock

Then follow the instructions in the diagnostic procedure.