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Home >> Land Rover >> 2020 >> Defender 110 X >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Infotainment Compute Control Module (ICCM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Infotainment Compute Control Module (ICCM) (G2400897) >> Description And Operation >> Infotainment Compute Control Module >> DTC B12B8-01: USB Port #2 - General electrical failure >> Action
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DTC B12B8-01: USB Port #2 - General electrical failure: Action

  1. Check that the electronic toll collection card reader details are displayed on the screen, if the information is displayed go to step  13. If no information is displayed 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  13
  3. Refer to the electrical circuit diagrams and disconnect the USB#2 cable from the electronic toll collection module
  4. Measure the voltage between pin 2 of the USB#2 cable and local ground connection on the vehicle
  5. If the voltage is between 4-6 volts, go to step  11, if not go to step 6
  6. If the voltage is greater than 6 volts, go to step 7, if not go to step  9
  7. Disconnect the USB#2 cable from the front infotainment control module and measure the voltage between pin 3 of the front infotainment control module connector harness side and a local ground connection on the vehicle
  8. If the voltage is greater than 6 volts, rectify the short circuit, replace the cable and go to step  2, if not go to step  13
  9. Disconnect the USB#1 cable from the front infotainment control module and measure the resistance between pin 3 of the front infotainment control module connector harness side and a local ground connection on the vehicle
  10. If the resistance is less than 1Ω, replace the cable and go to step  2, if not go to step  13
  11. Reconnect all connections and perform routine - On Demand Self Test (0x0202). If the fault persists install a new electronic toll collection module
  12. 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 13
  13. Check for other Diagnostic Trouble Code(s) relating to the customer concern and follow the DTC index
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