HVAC Module - Dual Automatic Temperature Control (DATC) On-Demand Self Test

HVAC MODULE - DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) ON-DEMAND SELF TEST

The HVAC Module - Dual Automatic Temperature Control (DATC) On-Demand Self Test will retrieve on-demand (hard fault) DTCs only, it will not retrieve continuous DTCs. Continuous DTCs can be cleared when exiting the HVAC Module - Dual Automatic Temperature Control (DATC) On-Demand Self Test. Make sure to retrieve continuous DTCs by carrying out the HVAC Module - Dual Automatic Temperature Control (DATC) - Retrieve Continuous DTCs procedure before clearing any continuous DTCs.

- The HVAC Module - Dual Automatic Temperature Control (DATC) On-Demand Self Test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A scan tool must be used to retrieve these concerns.
- The HVAC Module - Dual Automatic Temperature Control (DATC) On-Demand Self Test will detect concerns in the system control functions and will display on-demand (hard fault) DTCs for concerns that are present during the self-test. The vehicle interior temperature should be between 4°C-38°C (40°F-100°F) when carrying out the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed.
- The self-test can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when the self-test is activated.
- To enter the self-test, press the OFF and DEFROST buttons simultaneously and release, then press the AUTO button within 2 seconds. The display will show a flashing "----" for a maximum of 20 seconds, after which "8888" will be displayed if there are no on-demand DTCs present. If DTCs are present, the HVAC module - DATC will display the on-demand DTCs. Record all DTCs displayed.
- If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the HVAC Module - Dual Automatic Temperature Control (DATC) 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 during the self-test, GO to Symptom Chart - Climate Control System condition: The DATC System is Inoperative, Intermittent or Incorrect Operation. Symptom Chart - Climate Control System
- Always exit the self-test before powering the system down (system turned OFF).
- Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.