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 > Sfi System: ECM Power Source Circuit
DESCRIPTION When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to terminals + ...
