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Home >> Land Rover >> 2020 >> Range Rover SVAutobiography Dynamic >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Infotainment Master Controller/Infotainment Slave Controller (IMC/ISC) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Infotainment Master/Slave Controller (IMC/ISC) (G2385771) >> DTC B1A56-12: Antenna - Circuit short to battery >> Action
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DTC B1A56-12: Antenna - Circuit short to battery: Action

NOTE: Do Not  replace the infotainment master controller for this DTC alone
  1. Using the Jaguar Land Rover approved diagnostic equipment, perform routine - On Demand Self Test (0x0202) and read the Diagnostic Trouble Code(s). If the DTC is set go to step 2, if the DTC is no longer set go to step  3
  2. Refer to the appropriate system wiring diagrams and disconnect the AM/FM antenna from the infotainment master controller and perform step 1. Check for AM/FM antenna short circuit DTC, if the DTC is set refer to the system wiring diagrams and check the AM/FM antenna circuit for short circuit to battery. Repair the wiring harness as necessary
  3. Using the Jaguar Land Rover approved diagnostic equipment, check the infotainment master controller software release notes to see if a repair is available and update the infotainment master controller. Clear the Diagnostic Trouble Code(s) and retest
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