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Test L: Tachometer Inaccurate/Inoperative

  1. If instrument panel cluster diagnostic system check has been performed, go to next step. If instrument panel cluster diagnostic system check has not been performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. Turn ignition switch to RUN position. Using scan tool, perform TACH GAUGE SWEEP TEST. During sweep test tachometer should move from 0 to 7000 RPM. If tachometer does not perform as specified, go to next step. If tachometer performs as specified, concern may be intermittent. For aid in diagnosing intermittent problems, see PROBLEM DIAGNOSIS  under INTERMITTENTS.
  3. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  4. Check system for normal operation. If system operates normally, test is complete. If system does not operate normally, go to step  2.
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