Component Tests: Speedometer

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

On-Vehicle Inspection - Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer. Tire wear and tire over or under inflation will increase the indication error. See INSPECTING SPEEDOMETER ALLOWABLE INDICATION ERROR table. If error is excessive, replace the speedometer. See COMBINATION METER under REMOVAL & INSTALLATION.

INSPECTING SPEEDOMETER ALLOWABLE INDICATION ERROR

Standard Indication		Allowable Range
USA (mph)
20		18.5-21.5
40		38-41.5
60		58-62
80		77.5-82
100		97-102
120		116.5-122
140		136-142
Canada (km/h)
20		18-23
40		40-44
60		60-64.5
80		80-85
100		100-105
120		120-125.5
140		140-146
160		160-167
180		180-188
200		200-209
220		220-230
240		240-251

Resistance Inspection - See SPEEDOMETER CIRCUIT under CIRCUIT TESTS. Measure the resistance between terminals with fixing pointer to the stopper. See CONNECTOR IDENTIFICATION . See INSPECTING COMBINATION METER ASSEMBLY RESISTANCE table. If resistance value is not as specified, replace the meter. See COMBINATION METER under REMOVAL & INSTALLATION.