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 MANUALSTOYOTA2007HIGHLANDER 2WD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTUNE-UP AND ENGINE PERFORMANCE CHECKSIDLE SPEEDTESTING AND INSPECTION
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
Idle Speed: Testing and Inspection
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION Testing and Inspection
INSPECT ENGINE IDLE SPEED
(a) Warm up the engine.

(b) When using the intelligent tester:
Check the idle speed.
(1) Connect the intelligent tester to the DLC3.
(2) Enter DATA LIST MODE on the intelligent tester.
Idle speed:
650 to 750 rpm
NOTICE:
^ When checking the idle speed, the transmission should be in neutral.
^ Check the idle speed with the cooling fan off.
^ Switch off all accessories and air conditioning before connecting the intelligent tester.
HINT: Refer to the intelligent tester operator's manual for further details.

(c) When not using the intelligent tester:
Check the idle speed.
(1) Using SST, connect tachometer tester probe to terminal 9 (TAC) of the DLC3.
SST 09843-18030
(2) Check the idle speed.
Idle speed:
650 to 750 rpm
(a) Warm up the engine.
(b) When using the intelligent tester:
Check the idle speed.
(1) Connect the intelligent tester to the DLC3.
(2) Enter DATA LIST MODE on the intelligent tester.
Idle speed:
650 to 750 rpm
NOTICE:
^ When checking the idle speed, the transmission should be in neutral.
^ Check the idle speed with the cooling fan off.
^ Switch off all accessories and air conditioning before connecting the intelligent tester.
HINT: Refer to the intelligent tester operator's manual for further details.
(c) When not using the intelligent tester:
Check the idle speed.
(1) Using SST, connect tachometer tester probe to terminal 9 (TAC) of the DLC3.
SST 09843-18030
(2) Check the idle speed.
Idle speed:
650 to 750 rpm
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.