Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Gateway Module -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Gateway Module >> Description And Operation >> Gateway Module (GWM) >> B1412-87 Quiescent Relay Box - Missing message >> Possible Causes