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 MANUALSLEXUS1999RX 300 AWD V6-3.0L (1MZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSDIAGNOSTIC AIDSCONTINUITY AND RESISTANCE CHECK
1999 Lexus RX 300 AWD V6-3.0L (1MZ-FE)
Continuity and Resistance Check
1999 Lexus RX 300 AWD V6-3.0L (1MZ-FE)SECTION Continuity and Resistance Check
Continuity And Resistance Check:
a. Disconnect the battery terminal or wire so there is no voltage between the check points.
b. Contact the two leads of an ohmmeter to each of the check points.
Continuity And Resistance Check:
If the circuit has diodes, reverse the two leads and check again.
When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity.
When contacting the two leads in reverse, there should be no continuity.
Continuity And Resistance Check:
c. Use a volt/ohmmeter with high impedance (10 K Ohms/Volts minimum) for troubleshooting of the electrical circuit.
RENDER: 1.0x
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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.