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Home >> Buick >> 2004 >> Regal GS >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> Tachometer Inaccurate or Inoperative

Tachometer Inaccurate or Inoperative

Tachometer Inaccurate or Inoperative

Step Action Values Yes No
Schematic Reference: Instrument Cluster Schematics 
1 Did you perform the Instrument Cluster Diagnostic System Check? - Go to Step 2  Go to Symptoms - Instrument Panel, Gages and Console 
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 instrument panel cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement .
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