Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2001HIGHLANDER 2WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSECU POWER SOURCE CIRCUIT
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)
ECU Power Source Circuit
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)SECTION ECU Power Source Circuit
ECU Power Source Circuit
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc. When terminal GND and the case of the cruise control ECU are grounded.
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The ECU power source supplies power to the actuator and sensors, etc. When terminal GND and the case of the cruise control ECU are grounded.
Wiring Diagram:
Steps 1 - 3:
Step 3 (continued):
INSPECTION PROCEDURE
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.