Home >> Jaguar >> 2017 >> XJR Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Automatic Temperature Control Module (ATCM) >> Description And Operation >> Automatic Temperature Control Module (ATCM) >> DTC B1A64-12: Left Solar Sensor - Circuit short to battery >> Possible Causes