Home >> Jaguar >> 2017 >> XF S, RWD >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: TELEMATIC Control Module (TCU) -- XF/X260 >> Diagnostic Trouble Code Index DTC: Telematic Control Module (TCU) >> Description And Operation >> Telematics Control Module (TCU) >> DTC B1179-04: Integrated GSM/GPRS Unit - System internal failures >> Possible Causes