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Home >> Land Rover >> 2021 >> Defender 110 SE >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Infotainment Gateway Module (IGM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Infotainment Gateway Module (IGM) (G2805963) >> Description And Operation >> Infotainment Gateway Module (IGM) >> DTC B1A56-12: Antenna - Circuit short to battery >> Action
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DTC B1A56-12: Antenna - Circuit short to battery: Action

  1. Check the AM/FM radio is working by searching for any AM/FM radio stations and checking if the AM/FM source is active on the screen. If the AM/FM radio is working go to step  10, if not go to step 2
  2. 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 3, if the DTC is no longer set go to step  10
  3. Refer to the electrical circuit diagrams and disconnect the AM/FM antenna cable from the AM/FM antenna
  4. Measure the voltage between pin 1 of the AM/FM antenna cable and a local ground connection on the vehicle
  5. If the voltage is greater than 13 volts, go to step 6, if not go to step  8
  6. Disconnect the AM/FM antenna cable from the front infotainment control module and repeat step  4 measurement
  7. If the voltage is greater than 9 volts, rectify the short circuit, replace the cable and go to step  2, if not go to step  9
  8. Reconnect the AM/FM antenna cable back to the AM/FM antenna and the front infotainment control module. Perform routine - On Demand Self Test (0x0202). If the fault persists, install a new AM/FM antenna
  9. Check the front infotainment control module software release notes to see if a repair is available and update the front infotainment control module and repeat step  2. If no software update is available go to step 10
  10. Check for other related Diagnostic Trouble Code(s) and refer to the relevant DTC index
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