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.

Ignition » On / Vehicle » In Service Mode
Verify DTC P0106, P0107, P0108, P0641, P0651, P0697, P06A3 is not set.
- If any of the DTCs are set
  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle
- If none of the DTCs are set
Determine the current vehicle testing altitude.
Verify the scan tool parameter:MAP Sensor=The value should be within the range listed in the table: Altitude Versus Barometric Pressure
- If not in the specified range
  Refer to:DTC P0106
- If in the specified range
Verify the scan tool parameter:BARO=The value should be within the range listed in the table: Altitude Versus Barometric Pressure
- If not in the specified range
  Refer to: Circuit/System Testing
- If in the specified range
Verify the scan tool parameter:BARO Sensor=The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector:B75C Multifunction Intake Air Sensor
- Wiggle the harness and connector:K20 Engine Control Module
- If the value spikes or drops out
  Repair as necessary » Wiring / Terminal(s) / Electrical Connector(s)
- If the value does not spike or drop out
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Refer to: Circuit/System Testing
- If the DTC is not set
All OK.