Too Cold in Vehicle

Too Cold in Vehicle

Diagnostic Aids

* The condition may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
* The air temperature actuators can be calibrated. Refer to Re-Calibrating Actuators. Programming and Relearning






Test Description

Step 1 - Step 8:

Step 9 - Step 14:

Step 15 - Step 21:

Step 22 - Step 29:

The numbers below refer to the step numbers in the diagnostic table.
8. This step ensures that the lower air temperature sensors operate properly. The LH and RH Heater Duct Actual parameter count values should lower as the air temperature of the ducts get warmer. If there is a high resistance in either of the air temperature sensors circuits or the sensor itself, then the count value of the affected sensor would remain high.
9. This step ensures that the upper air temperature sensors operate properly. The LH and RH AC Duct Actual parameter count values should lower as the air temperature of the ducts get warmer. If there is a high resistance in either of the air temperature sensors circuits or the sensor itself, then the count value of the affected sensor would remain high.
15. Use the following table to determine that the recorded scan tool values are within range for the recorded probe temperatures.