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Saturday, March 28th, 2009 AT 8:43 AM
Dual Automatic Temperature Control Module On-demand Self-Test The DATC module 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 DATC module on-demand self-test. Make sure to retrieve continuous DTCs by carrying out the Dual Automatic Temperature Control Module - Retrieve Continuous DTCs procedure before clearing any continuous DTCs. Ã The DATC module on-demand self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A diagnostic tool must be used to retrieve these concerns. Ã The DATC module 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 performing the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed. Ã 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. Ã To enter the self-test press the OFF and FLOOR buttons simultaneously and release, then press the AUTO button within two seconds. The display will show a flashing blower icon for 20 seconds, after which all vacuum fluorescent segments will be displayed if there are no on-demand DTCs present. If DTCs are present the DATC module will display "00 00" and then on-demand DTCs. Record all DTCs displayed. Ã If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the DIAGNOSTIC TROUBLE CODE INDEX and follow the ACTION for each DTC given. Ã If a condition exists but no DTCs appear during the self-test, GO to Symptom Chart Condition: The DATC System Is Inoperative, Intermittent or Incorrect Operation. Ã To exit the self-test and retain all continuous DTCs, press any button except DEFROST. The DATC module will exit the self -test and retain all continuous DTCs. Ã To exit the self-test and clear all continuous DTCs, press the DEFROST button. The DATC module will exit the self-test and all continuous DTCs will be cleared. Ã Always exit the self -test before powering the system down (system turned OFF). Once the self- test is exited the ignition switch must remain ON for at least 30 seconds to allow the temperature blend door actuators to automatically recalibrate. Ã Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.