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.

NOTE:

To minimize the effects of residual engine heat and sensor internal heating elements, perform Steps 1 and 2 of this verification procedure only if the ignition has been OFF for 8 hours or more.

Ignition ON.
Verify the following scan tool parameters are within 30°C (54°F) of each other.
- Start-Up IAT Sensor 1
- IAT Sensor 2
- Start-up ECT
- If not within 30°C (54°F)
  Refer to Circuit/System Testing.
- If within 30°C (54°F)
Engine idling, verify the following scan tool parameters are between: -38 and +149°C (-36 and +300°F).
- IAT Sensor 1
- IAT Sensor 2
- ECT Sensor
- If not between: -38 and +149°C (-36 and +300°F)
  Refer to Circuit/System Testing.
- If between: -38 and +149°C (-36 and +300°F)
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 DTCs do not set.
- If any of the DTCs set
  Refer to Circuit/System Testing.
- If none of the DTCs set
All OK