DESCRIPTION If the sliding function and tilt function do not operate, there may be a malfunction in the sliding roof ECU power source circuit. WIRING DIAGRAM 
CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure. PROCEDURE
(a) Use the Data List to check if the ignition switch signal is functioning properly. Click here
OK: The Techstream displays as shown in the table according to the operation of each switch.
(a) Disconnect the W3 ECU connector. (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Can Communication System: Check Bus 3 Lines for Short Circuit
DESCRIPTION There may be a short circuit between the bus 3 CAN main wires and/or CAN branch wires when the resistance between terminals 6 (CA3H) and 21 (CA3L) or 19 (CAYH) and 20 (CAYL) of the central gateway ECU (network gateway ECU) is below 54 Ω. Symptom Trouble Area *1: w/ Audio and Visual Syst ...
