rrgone
Well-Known Member
- Joined
- July 9, 2006
- Messages
- 768
- Reaction score
- 5
- City, State
- Tucson, AZ
- Year, Model & Trim Level
- '02 XLT
I can't say for sure right now but I believe that both sides are only getting mildly warm air at best. But I will check tomorrow to see if there is a difference. Mainly I have been setting the sytem to blow air from the dash vents and I have been unable to get decent warm air. Defrost doen't work well either. The vents do blow cold air when I reduce the temp setting however. Also, I did check the rear air system and that seems to be getting proper warm air. So is there a blend door on the right and left of the front center console that I can get to and see if either is being fully operated?
Yep, there are 2 blend doors and 2 actuators with the DATC. The one on the left is what is shown in this thread and your's has one in the same place. Your's also has one on the right side that looks like a holy terror to get at. The FSM shows the whole dash assembly being "positioned aside" to get to it.
But, does it sound logical that both blend doors would be only going part way to heat on both sides at the same time? Sounds to me like something else is wrong, maybe one of the sensors is giving bad input to the DATC module. It gets input from the cabin air temp sensor, the ambient air temp sensor, the sun load sensor, and the PCM. The DATC module can store 2 types of codes from all the input sensors except the PCM. Don't ask me why Ford calls hard fault codes "on demand" and intermittant fault codes "continuous", but they do. So see if any codes are stored:
Dual Automatic Temperature Control Module — Diagnostic Methods
The dual automatic temperature control system must be diagnosed by first retrieving any DTCs, if present.
- An on-demand (hard fault) DTC indicates that the fault is currently present. An on-demand DTC suggests a wiring fault, disconnected connector, or component failure.
- A continuous (intermittent) DTC alone (corresponding on-demand DTC is not present) indicates that the fault is an intermittent condition and may not be currently present. A continuous only DTC suggests a poor wiring connection, loose pin or terminal, or intermittent component failure.
On-demand DTCs can also be retrieved by carrying out the Dual Automatic Temperature Control Module on-demand Self-Test. To retrieve and/or clear continuous DTCs carry out the Dual Automatic Temperature Control Module — Retrieve Continuous DTCs procedure. Always carry out the Dual Automatic Temperature Control Module on-demand Self-Test before retrieving continuous DTCs.
If no DTCs are present, GO to Symptom Chart for the appropriate diagnostic action
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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.
- 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.
- 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.
- 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 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.
- If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the Dual Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
- 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.
- 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.
- 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.
- 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.
- Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.
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Dual Automatic Temperature Control Module — Retrieve Continuous DTCs
The DATC module will retrieve only continuous (intermittent) 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 PANEL buttons simultaneously and release, then press the AUTO button within two 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 DATC module display. Record all DTCs displayed.
- If any DTCs appear, carry out the diagnostic procedure. Refer to the Dual Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
- If a condition exists but no DTCs appear, GO to Symptom Chart Condition: The DATC System Is Inoperative, Intermittent or Incorrect Operation.
- To exit and retain all continuous DTCs, press any button except DEFROST. The DATC module will exit the retrieve continuous DTCs mode and retain all continuous DTCs.
- To exit and clear all continuous DTCs, press the DEFROST button. The DATC module 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 temperature blend door actuators to automatically recalibrate.
- Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.
Be sure to write down any codes you might get during either test. Also note that you should wait 30 seconds after you turn the DATC off before turning the ignition switch off for the blend door actuators to recalibrate. See if you can hear the actuators moving during that 30 seconds.
It would be really great if the DATC could retrieve codes from the PCM, but it can't.