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Tachometer Inaccurate or Inoperative

Tachometer Inaccurate or Inoperative

Step Action Yes No
Schematic Reference: Instrument Cluster Schematics 
1 Did you perform the Instrument Cluster Diagnostic System Check? Go to Step 2  Go toDiagnostic System Check - Instrument Cluster 
2
  1. Install a scan tool.
  2. Start the engine.
  3. With the scan tool, observe the Engine Speed parameter in the PCM Engine Data 1 data list.
Does the Engine Speed parameter match the tachometer display?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement (Chevrolet)  or Instrument Panel Cluster (IPC) Replacement (Pontiac) .
Did you complete the replacement?		 Go to Step 4  -
4 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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