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.
When using LEXUS hand-held tester
- Check speedometer value.
PREPARATION:
- Connect the LEXUS hand-held tester to the DLC3.
- Turn ignition switch ON and LEXUS hand- held tester main switch ON.
- Select the DATA LIST mode on the LEXUS hand- held tester.
CHECK:
When driving the vehicle, check that parameter value of "Speedometer" changes on the screen of the LEXUS hand held tester.
NOTE:- Be sure to safely route all cables when driving with the tester connected to the vehicle (i.e., keep cables away from feet, pedals, steering wheel and shift lever).
- Persons are required when test driving with the tester: 1 person to drive the vehicle, and 1 person to operate the tester.
OK:
The speed displayed on the screen of the tester changes as the vehicle speed changes.
- OK; Replace combination meter.
- NG: Go to next Step.
- Check harness and connector between combination meter and ABS ECU (A/T) combination meter and speed sensor (M/T) (See
HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
).
- NG: Repair of replace harness or connector.
- OK: Go to next step.
Check speed sensor circuit and ABS ECU .
NO RELATED
Use the Manual With the Right Hardware
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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.