Circuit/System Verification

Ignition ON.
Verify that DTC DTC P0641, P0651, P0697 or P06A3 is not set.
- If any of the DTCs are set
  Refer to DTC P0641, P0651, P0697 or P06A3 (ECM) for further diagnosis.
- If none of the DTCs are set
Ignition ON.
NOTE: To minimize the effects of residual engine heat and sensor internal heating elements, perform Steps 3 and 4 of this verification procedure only if the ignition has been OFF for 8 hours or more.
Verify the following scan tool parameters are within 25°C (45°F) of each other.
- Start-Up IAT Sensor 1
- IAT Sensor 2
- IAT Sensor 3; where equipped
- If not within 25°C (45°F)
  Refer to Circuit/System Testing .
- If within 25°C (45°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
- IAT Sensor 3; where equipped
- 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 DTC does not set.
- If the DTC sets
  Refer to Circuit/System Testing .
- If the DTC does not set
All OK