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Circuit/System Verification

  1. Verify no DTC is set.
    • If any DTC is set, diagnose this first.
  2. Vehicle in Service Mode, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the instrument cluster performs a screen test sequence.
    NOTE:

    Since there are no gauges, the instrument cluster will go through a screen test sequence instead of sweeping the gauges.

    • If the instrument cluster does not perform the screen test sequence, replace the P16 instrument cluster.
  3. Drive the vehicle, verify the speedometer value matches the Vehicle Speed parameter on the scan tool.
    • If the value do not match, replace the P16 instrument cluster.
  4. Drive the vehicle, verify the odometer display, the displayed distance counts up while driving.
    • If the odometer displays only "----" (dashes), go to circuit/system testing.
    • If the odometer display does not count up, verify the scan tool Body Control Module Odometer parameter and scan tool Engine Control Module Odometer parameter are functioning correctly. If the Engine Control Module Odometer parameter does not count up while driving, replace the K20 engine control module. If the Body Control Module Odometer parameter does not count up while driving, replace the K9 BCM. If the K9 BCM and K20 Engine Control Module are working correctly, replace the P16 instrument cluster.
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