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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 B1087-86: LIN Bus "A" - Signal invalid >> Action
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DTC B1087-86: LIN Bus "A" - Signal invalid: 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  5
  2. Check the volume up/down functionality of the steering wheel switch. If the steering wheel switch is functioning correctly go to step 3. If the steering wheel switch is not functioning correctly go to step  4
  3. Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the infotainment master controller with the latest level software. Clear the Diagnostic Trouble Code(s) and retest
  4. Refer to the appropriate system wiring diagrams and check the LIN bus (comfort) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness or replace steering wheel switch as necessary
  5. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest
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