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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Displays And Gauges) >> Diagnostic Information and Procedures >> Tachometer Inaccurate or Inoperative (with L3T) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify the tachometer sweeps when performing the scan tool Instrument Cluster Gauge Sweep control function.
    • If the tachometer does not sweep 

      Replace the P16 Instrument Cluster

    • Go to next step: If the tachometer sweeps 
  3. Engine running, verify the tachometer display matches the scan tool Engine Speed parameter in the ECM Engine Data List.
    • If tachometer display does not match the Engine Speed parameter 

      Perform Circuit/System Testing.

    • Go to next step: If tachometer display matches the Engine Speed parameter 
  4. All OK.
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