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Circuit/System Verification

  1. Ignition ON, A11 radio ON.
  2. Verify DTC U0257 is not set.
    • If DTC U0257 is not set 
  3. Verify DTC B1020 is not set.
    • If DTC B1020 is not set 
  4. Verify the information display module turns on and information is shown on the display.
    • If the info display module turns on and information is shown on the display. 
  5. Verify that all radio controls operate and perform the correct function.
    • If some, but not all, controls operate normally. 

      Replace the A20 radio/HVAC controls.

    • If all radio controls operate and perform the correct function. 
  6. All OK.
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