WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Tire wear and tire over or under inflation will increase the indication error.

On-Vehicle Inspection - Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer. See INSPECTING SPEEDOMETER ON-VEHICLE table. If error is excessive, replace the speedometer. See COMBINATION METER under REMOVAL & INSTALLATION.

INSPECTING SPEEDOMETER ON-VEHICLE

Standard Indication		Allowable Range
USA (mph)
20		18-24
40		38-44
60		56-66
80		78-88
100		98-110
120		118-132
Canada (km/h)
20		17-24
40		38-46
60		57.5-67
80		77-88
100		96-109
120		115-130
140		134-151.5
160		153-173

Resistance Inspection - Remove the meter cover, A/C and combination meter integrated ECU and combination meter circuit plate. See COMBINATION METER under REMOVAL & INSTALLATION. Measure the resistance between terminals with fixing pointer to the stopper. See CONNECTOR IDENTIFICATION . See INSPECTING SPEEDOMETER ASSEMBLY RESISTANCE table. If resistance value is not as the specified, replace the meter. See COMBINATION METER under REMOVAL & INSTALLATION.

INSPECTING SPEEDOMETER ASSEMBLY RESISTANCE

Tester Connection	Resistance (Ohms)
A - B	140-185
C - D	130-175

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.

Safety Warning

Component Tests: Speedometer

Use the Manual With the Right Hardware

When to See a Mechanic