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Tachometer Is Incorrect

  1. Connect instrument cluster connectors. Start engine. Measure voltage between ground and instrument cluster connector terminal No. 41. See Figure . If voltage is not 1-5 volts, replace instrument cluster. If voltage is 1-5 volts, shut off engine.
  2. Disconnect instrument cluster middle connector. Disconnect Engine Control Unit (ECU) connector. Check continuity between instrument cluster connector terminal No. 41 and ECU connector terminal No. 32 (Yellow/Green wire). If there is continuity, check ECU. See PIN VOLTAGE CHARTS article in ENGINE PERFORMANCE. If there is no continuity, repair wiring as necessary.
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