HVAC Module - Electronic Automatic Temperature Control (EATC) - Retrieve Continuous DTCs

HVAC MODULE - ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) - RETRIEVE CONTINUOUS DTCS

The HVAC module - electronic automatic temperature control (EATC) will retrieve only continuous (intermittent and hard) DTCs when carrying out this procedure.
- Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
- To retrieve continuous DTCs, press the OFF and DEFROST buttons simultaneously and release, then press the RECIRC button within 2 seconds. All vacuum fluorescent segments will be displayed if there are no continuous DTCs present. Continuous DTCs are indicated by the presence of the degrees Celsius symbol (°C) on the HVAC module - EATC display. Record all DTCs displayed.

- NOTE: If continuous DTC(s) appear but the same DTC(s) do not appear during an on-demand self test, the fault may be intermittent in nature. Diagnosis should be conducted accordingly.

If any DTCs appear, carry out the diagnostic procedure. Refer to the HVAC Module - Electronic Automatic Temperature Control (EATC) DTC Chart and follow the ACTION for each DTC given. Diagnostic Trouble Code Tests and Associated Procedures

- If a condition exists but no DTCs appear, GO to Symptom Chart - Climate Control Systems Condition: The HVAC - EATC System is Inoperative, Intermittent or Incorrect Operation. Symptom Chart - Climate Control Systems
- To exit and retain all continuous DTCs, press any button except DEFROST. The HVAC module - EATC will exit the retrieved continuous DTCs mode and retain all continuous DTCs.
- To exit and clear all continuous DTCs, press the DEFROST button. The HVAC module - EATC will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
- Always exit the procedure before powering the system down (system turned OFF). Once the procedure is exited, the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
- Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.