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 DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONMONITORS, TRIPS, DRIVE CYCLES AND READINESS CODESCONFIRMATION DRIVING PATTERN
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)
Confirmation Driving Pattern
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)SECTION Confirmation Driving Pattern
CONFIRMATION DRIVING PATTERN
1. Switch the TOYOTA hand-held tester from the normal mode to the check mode. (*1)
2. Start the engine and let the engine idle for 100 seconds or more. (*2)
3. Drive the vehicle at 40 km/h (24 mph) or more for 20 seconds or more. (*3)
4. Let the engine idle for 20 seconds or more. (*4)
5. Repeat the procedure (*3) and (*4) three times. (*5)
6. Let the engine idle for 30 seconds. (*6)
7. Check the oxygen sensor output voltage.
HINT: If a malfunction exists, the check engine warning light comes on.
NOTE: If the conditions on this test are not strictly followed, the malfunction will not be detected.
CONFIRMATION DRIVING PATTERN
1. Connect the TOYOTA hand-held tester to the DLC3.(*1)
2. Switch the TOYOTA hand-held tester from the normal mode to the check (test) mode. (*1)
3. Start the engine and let the engine idle for 60 seconds or more. (*2)
4. Drive the vehicle at 30 km/h (28 mph) or more for 40 seconds or more. (*3)
5. Let the engine idle for 10 seconds or more. (*4)
6. Preform steps (*3) to (*4)9 times. (*5)
HINT: If a malfunction exists, the MIL will light up on the multi information display during step (*5).
NOTE: If the conditions In this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a TOYOTA hand-held tester, turn the ignition switch OFF after performing steps from (*2) to (*5), then perform steps from (*2) to (*5) again.
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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.