Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

With UDD

Ignition ON.
Verify the engine oil pressure indicator turns on and off when commanding the All Indicators ON and OFF with a scan tool.
- If the engine oil pressure indicator does not turn on and off.
  Replace the P16 Instrument Cluster.
- If the engine oil pressure indicator turns on and off
Verify the scan tool Engine Oil Pressure Sensor parameter is 0 psi (0 kPa).
- If not 0 psi (0 kPa)
  Refer to Circuit/System Testing.
- If 0 psi (0 kPa)
Engine running.
Verify actual engine oil pressure is within specified range. Refer to Oil Pressure Diagnosis and Testing in Displays and Gauges Component Replacement Reference .
Verify the scan tool Engine Oil Pressure parameter is within specified range.
- If not within specified range
  Refer to Circuit/System Testing.
- If within specified range
Verify the engine oil pressure displayed on Instrument Cluster is within specified range.
- If not within specified range
  Test or replace the P16 Instrument Cluster.
- If within specified range
All OK.

With UDV or UHS

Ignition ON.
Verify the scan tool Engine Oil Pressure Sensor parameter is 0 psi (0 kPa).
- If not 0 psi (0 kPa)
  Refer to Circuit/System Testing.
- If 0 psi (0 kPa)
Engine running.
Verify actual engine oil pressure is within specified range. Refer to Oil Pressure Diagnosis and Testing in Displays and Gauges Component Replacement Reference .
Verify the scan tool Engine Oil Pressure parameter is within specified range.
- If not within specified range
  Refer to Circuit/System Testing.
- If within specified range
Verify the engine oil pressure displayed on Instrument Cluster is within specified range.
- If not within specified range
  Test or replace the P16 Instrument Cluster.
- If within specified range
All OK.