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Tachometer Circuit

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: If not using the hand-held tester, start the inspection from step  2.
  1. Perform the active test. Connect the hand-held tester to the DLC3. See Figure. Enter into ACTIVE TEST function of the hand-held tester. Check that the probe moves as the hand-held tester directs in each range. If the meter operates normally, replace the A/C and combination meter integrated ECU. See COMBINATION METER  under REMOVAL & INSTALLATION. If the meter does not operate normally, go to the next step.
  2. Check the igniter signal circuit. See IGNITER SIGNAL CIRCUIT . If the results are OK, go to the next step. If the results are not good, check and repair the igniter signal circuit.
  3. Check the tachometer. See TACHOMETER  under COMPONENT TESTS. If the results are OK, check and replace the combination meter circuit plate. See COMBINATION METER  under REMOVAL & INSTALLATION. If the results are not good, replace the tachometer. See COMBINATION METER  under REMOVAL & INSTALLATION.
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