Home >> Jaguar >> 2017 >> XJR Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Image Processing Module (IPMA) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Image Processing Module (IPMA) >> Description And Operation >> Image Processing Control Module (IPCM) >> DTC B151F-31: Auxiliary Cooling Fan - No signal >> Possible Causes