DESCRIPTION When the ignition switch is turned to on, the IG power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU. The multiplex tilt and telescopic ECU also receives ignition switch signals via this circuit. WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT HINT: Inspect the fuses for circuits related to this system before performing the following procedure. PROCEDURE
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Parts Location
PARTS LOCATION ILLUSTRATION *1 UNLOCK WARNING SWITCH ASSEMBLY *2 TRANSPONDER KEY COIL *3 TRANSPONDER KEY ECU ASSEMBLY *4 ECM *5 COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT) *6 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *7 DRIVER SIDE JUNCTION BLOCK ASSEMBLY - ECU-B NO.1 FUSE - ECU-IG2 NO.3 ...