How to retrieve ATC and MTC trouble codes - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
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post #1 of 3 (permalink) Old 11-12-2009, 11:06 PM Thread Starter
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How to retrieve ATC and MTC trouble codes

As originally posted by IS300M:

On cars with automatic climate control(ATC): To enter diagnostic mode, set the temperature to 75F, press the the off button. Press Floor, Defrost\Floor, Front Defrost simultaneously for 3 seconds until the temperature display begins to flash.


On cars with manual climate control(MTC), set the blower to any speed, turn the temperature control in between warm and cold. Press Floor, Defrost\Floor, and Front Defrost. All codes will flash via the Front Defrost button.

When the test is over all fault codes will be displayed (on cars without automatic climate control, they will be blinked out on the Front Defrost button).

Codes Common to ATC and MTC

23 BLEND DOOR ACTUATOR FEEDBACK FAILURE
24 MODE DOOR ACTUATOR FEEDBACK FAILURE
25 AMBIENT SENSOR
31 RECIRCULATION DOOR ACTUATOR STALL FAILURE
32 BLEND DOOR ACTUATOR STALL FAILURE
33 MODE DOOR ACTUATOR STALL FAILURE
35 EVAPORATOR SENSOR FAILURE
37 BLEND DOOR ACTUATOR OUTPUT SHORTED TO BATTERY
38 BLEND DOOR ACTUATOR OUTPUT SHORTED TO GROUND
39 MODE DOOR ACTUATOR OUTPUT SHORTED TO BATTERY
40 MODE DOOR ACTUATOR OUTPUT SHORTED TO GROUND
41 RECIRCULATION DOOR ACTUATOR OUPUT SHORTED TO BATTERY
42 RECIRCULATION DOOR ACTUATOR OUTPUT SHORTED TO GROUND
43 COMMON DOOR OUTPUT SHORTED TO BATTERY
44 COMMON DOOR OUTPUT SHORTED TO GROUND
51 SYSTEM VOLTAGE TOO LOW FOR DOOR CALIBRATION

Codes only for ATC

26 ATC IN-CAR TEMPERATURE THERMISTER FAILURE
27 ATC IN-CAR SENSOR FAILURE
34 ENGINE TEMPERATURE MESSAGE NOT RECEIVED
36 ATC CONTROL COMMUNICATION FAILURE

Codes only for MTC

45 A/C CONTROL BLEND DOOR INPUT OPEN OR SHORTED TO GROUND
46 A/C CONTROL BLEND DOOR SHORTED TO BATTERY
47 A/C CONTROL - A/C SWITCH FAILURE
48 A/C CONTROL MODE DOOR INPUT SHORTED TO GROUND
49 A/C CONTROL MODE DOOR INPUT SHORTED TO BATTERY
50 A/C CONTROL ELECTRIC BACKLITE (EBL) SWITCH FAILURE


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post #2 of 3 (permalink) Old 01-23-2010, 03:12 PM
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what does code 26 mean?
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post #3 of 3 (permalink) Old 01-23-2010, 03:27 PM
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I'm going to guess the thermistor in the ATC head has failed. It's below the fan speed knob behind the little slotted grill. Could also be clogged with dust and gunk. It's not difficult to take the ATC head apart and clean it. Just be careful when you take the ATC face off. There's a number of plastic pins under the selector buttons that will fall out on the floor if you have the ATC facing down when you take it apart.

And with all electrical repairs or assembly...it's recommended that you disconnect the battery before pulling the ATC out. It has power to it at all times.
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