Circuit/System Verification

WARNING: This page is about a different car, the 2012 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, A11 radio ON.
Verify DTC U0257 is not set.
- If DTC U0257 is set
  Refer to Radio Information Display Malfunction - DTC U0257 .
- If DTC U0257 is not set
Verify DTC B1020 is not set.
- If DTC B1020 is set
  Refer to DTC B1020 .
- If DTC B1020 is not set
Verify the information display module turns on and information is shown on the display.
- If the information display malfunctions.
  Refer to Radio Information Display Malfunction - DTC U0257 .
- If the info display module turns on and information is shown on the display.
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.
All OK.