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Tachometer Is Inoperative Or Inaccurate

  1. Perform INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTICS. Go to next step.
  2. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Establish communication with IPC. Select SPECIAL FUNCTIONS under main menu. Select OUTPUT CONTROL. Select TACHOMETER GAUGE SWEEP TEST. Tachometer gauge should perform a full sweep when commanded. If tachometer gauge does not operate as specified, go to next step. If tachometer gauge operates as specified, perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  3. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After replacing IPC, recheck system operation.
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