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Home >> Chevrolet >> 2005 >> Cobalt SS >> 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 Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End Views Reference: Powertrain Control Module (PCM) Connector End Views in Engine Controls - 2.0L or Engine Control Module (ECM) Connector End Views in Engine Controls - 2.2L
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Start the engine.
  3. With the scan tool, observe the Engine Speed parameter in the ECM/PCM engine 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 Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
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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