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Speedometer Circuit

WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If not using the hand-held tester, begin with step  2.
  1. Perform the active test. Connect the hand-held tester to DLC3. See Figure. Turn the ignition switch ON and hand-held tester main switch ON. Select the ACTIVE TEST mode on the hand-held tester. Check that the probe moves as the hand-held tester directs each range. If the probe operates normally, go to SPEED SENSOR CIRCUIT . If the probe does not operate normally, go to the next step.
  2. Check the speedometer. See SPEEDOMETER  under COMPONENT TESTS. If the results are OK, go to the next step. If the results are not good, replace the speedometer. See COMBINATION METER  under REMOVAL & INSTALLATION.
  3. Check the circuit plate. See COMBINATION METER CIRCUIT PLATE . If the results are OK, check and replace the combination meter. See COMBINATION METER CIRCUIT . If the results are not good, replace the circuit plate. See COMBINATION METER  under REMOVAL & INSTALLATION.
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