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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2001HIGHLANDER 2WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTFUEL DELIVERY AND AIR INDUCTIONVARIABLE INDUCTION SYSTEMTESTING AND INSPECTION
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)
Variable Induction System: Testing and Inspection
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)SECTION Testing and Inspection
THROTTLE BODY IDLE SPEED CONTROL VALVE ASSY [22270 / 98-40]
NOTE: It is impossible to check the resister value and the operation of ISCV by itself, because the ISCV has an IC circuit inside it, which transforms the duty signal from the ECU to the derive signal.
After checking, erase the DTC.
Clear the DTC after inspection.
HINT: When the ISCV system has malfunctions except for its adherence, DTC is detected.
a. Remove the ISC.
b. Operation inspection.
1. Connect the ISC connector to the ISC valve.
2. Check the ISC valve movement when the ignition switch is turned ON.
Movement:
Half open fully close->fully open->half open
HINT: ISC valve moves within 0.5 second.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.