FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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1999
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SC 400 V8-4.0L (1UZ-FE)
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Repair and Diagnosis
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Component Tests and General Diagnostics
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ECU Power Source Circuit
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source also supplies power to the ECU and sensor etc. Power is supplied to the ECU even when the ignition switch.
WIRING DIAGRAM
Step 2:
Step 3:
INSPECTION PROCEDURE