System Tests: Notes

NOTE: Before proceeding with any system test, ensure proper trouble shooting procedure was performed and multiplex control system operation is functional and no DTCs are present. See MULTIPLEX CONTROL SYSTEMS - AVALON article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. If the multiplex communication system is functioning properly and no diagnostic trouble codes are stored, the body control system must be interrogated next to determine if the power door lock, wireless door lock control, horn, headlight control, interior light control and taillight control systems are operating properly. See BODY CONTROL SYSTEMS - AVALON article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.