Electrical Wiring Diagram. System circuits. Toyota yaris. CONTENT: System Outline. 1. Abs. 2. Air Conditioning. 3. Audio system. 4. Back-Up Lights. 5. Charging. 6. Cigarette Lighter. 7. Combination gauges. 8. Cooling Fan. 9. Cruise Control. 10. Data Link Connector 3. 11. Control of Door Locks. 12. Electronic Controlled Transmission and A / T Indicators. 13. Engine Control.