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HINT: For details of the connectors, refer to the "TERMINALS OF ECU" . a. Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits. 1. Disconnect all connectors in all AVC-LAN circuits. 2. Check for an open or short in all AVC-LAN circuits. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS VEHICLE SPEED SIGNAL CIRCUIT BETWEEN STEREO COMPONENT AMPLIFIER AND DESCRIPTION This circuit is necessary for the ASL (Auto Sound Leveliser) built into the stereo component amplifier. Speed The ASL function automatically adjusts the sound data in order to enable the driver to hear clear audio sound HINT: A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is If a short occurs in an ECU, all systems in the diagram below will not operate normally. WIRING DIAGRAM
2009 Toyota Tundra 2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra
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