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 tachometer 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 running the engine, check that parameter value of "Tachometer" changes on the screen of the hand held tester.
OK:
The revolutions displayed on the screen of the tester changes as the engine rotates.
- OK: Replace combination meter.
- NG: Go to next Step.
- Check harness and connector between combination meter and ECM (See
HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
).
- NG: Repair or replace harness or connector.
- OK: Go to next step.
Check igniter circuit (See DTC P0351: IGNITER COIL "A" PRIMARY/SECONDARY CIRCUIT ).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.