Diagnostic Test

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION
1. Inspect the A/C Heater Control for an object or debris holding the Rear Function Control Switch in an On position.
  NOTE:
  Using the scan tool you can read the On/Off status of the control switch.
  
  Is the Rear Function Control Switch being held in or stuck On?
  
  Yes
  - Clean or repair the A/C Heater Control as necessary. If you are unable to clean the switch to where the switch can work properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to FRONT - CONTROL, A/C AND HEATER, REMOVAL and/or REAR - CONTROL, A/C AND HEATER, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Go To 2.
A/C HEATER CONTROL
1. Turn the ignition on.
2. Using the scan tool, erase HVAC DTCs.
3. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds.
4. Using the scan tool, read HVAC DTCs.
  Does the scan tool display this DTC as Active or is the status of the switch reading On?
  
  Yes
  - Replace and program the A/C Heater Control in accordance with the Service Information. Refer to FRONT - CONTROL, A/C AND HEATER, REMOVAL and/or REAR - CONTROL, A/C AND HEATER, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .
  No
  - Test complete.
  - Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST .