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 MANUALSTOYOTA2002HIGHLANDER 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWDIAGNOSTIC STRATEGIESSERVICE HINTS
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Service Hints
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Service Hints
E4 ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW
3 - 4 : Closed with the select SW at SNOW position
E5 (A), E6 (B), E7 (C), E8 (D), E9 (E) ENGINE CONTROL MODULE
BATT - E1 : Always approx. 12 volts
+B - E1 : Approx. 12 volts with the ignition SW ON position
MREL - E1 : Approx. 12 volts with the ignition SW ON position
P1 A/T INDICATOR SW
3 - 1 : Closed with the shift lever in P position
3 - 2 : Closed with the shift lever in R position
3 - 5 : Closed with the shift lever in N position
3 - 7 : Closed with the shift lever in D position
3 - 4 : Closed with the shift lever in 2 position
3 - 8 : Closed with the shift lever in L position
3 - 4 : Closed with the select SW at SNOW position
E5 (A), E6 (B), E7 (C), E8 (D), E9 (E) ENGINE CONTROL MODULE
BATT - E1 : Always approx. 12 volts
+B - E1 : Approx. 12 volts with the ignition SW ON position
MREL - E1 : Approx. 12 volts with the ignition SW ON position
P1 A/T INDICATOR SW
3 - 1 : Closed with the shift lever in P position
3 - 2 : Closed with the shift lever in R position
3 - 5 : Closed with the shift lever in N position
3 - 7 : Closed with the shift lever in D position
3 - 4 : Closed with the shift lever in 2 position
3 - 8 : Closed with the shift lever in L position
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.