Circuit/System Verification
- Vehicle in Service Mode, radio ON.
- Verify that all radio/HVAC controls operate and perform the correct function.
- If some, but not all, controls operate normally.
Replace the A20 Radio/HVAC Controls.
- If all controls are inoperative.
Refer to Circuit/System Testing
- If all controls operate and perform the correct function.
- If some, but not all, controls operate normally.
- All OK.