Atc error code 24

Last Edited By Krjb Donovan
Last Updated: Mar 11, 2014 07:47 PM GMT

Question

I have a Chrysler 2000 Concorde. The heater is blowing heat but only out the defroster and not to the floor or main vents. I ran the ATC diagnostic test and received a code of 24. I found instructions on how to fix at your site, Thanks. However in the manual i was looking at it referenced possible other codes and need to push and release panel button. Is there a way to see if more error codes exist? Thanks

Answer

SELF DIAGNOSTICS DIAGNOSTIC TROUBLE CODES (DTC's) Both the ATC and the Manual A/C system are controlled by the Body Control Module (BCM) Both systems can be diagnosed by the DRBIII? scan tool or the vehicles own control head display. Refer to the DRBIII? menu for checking Diagnostic Trouble Codes (DTC's) Note that there are three DTC tables. The ATC and Manual A/C DTC table contain faults that are common to both the ATC and the Manual A/C system. The same diagnosis can be used for both systems. The DTC's cover operation of the climate control unit actuators, doors, evaporator temperature sensor, ambient temperature sensor and the A/C refrigerant system. The Manual A/C DTC table covers Fault Codes that are for the manual A/C Control Head and wiring and are not used on an ATC system. The ATC DTC table has DTC's for ATC Head Communications, In-Car Temperature Sensor and Sun Sensor which are not in a Manual A/C system

ATC AND MANUAL A/C DTC's CODE DESCRIPTION 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 RECIRC DOOR ACTUATOR OUPUT SHORTED TO BATTERY 42 RECIRC 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

TROUBLE CODES FROM THE ATC CONTROL


To place the system into it's diagnostic mode, press and hold the Floor, Mix and Defrost buttons (at the same time) The ATC head display will begin to blink. Release the Floor, Mix and Defrost buttons. Once the control head enters the diagnostic mode, the display on the control head will continue to blink. This occurs until it completes its tests and climate control unit door/actuator calibrations. Then it will display any diagnostic trouble codes that are present in the BCM. If there are no diagnostic trouble codes, the system will return to its normal operation as indicated by the temperature symbol (a C or a F) Diagnostic trouble codes related to the ATC and climate control unit will appear on the display in numerical form. The diagnostic trouble codes are stored in the BCM and can range between 23 and 51. The ATC control can only show one diagnostic trouble code at a time. Under certain circumstances, more than one diagnostic trouble code could be in the memory. To scroll through any additional diagnostic trouble codes, press the Panel Mode button on the ATC control. It is important that no other knob or button is pushed until all codes are read. Pushing any button except Panel Mode or turning a knob will end the diagnostic test without showing the rest of the trouble codes. There also may be other trouble codes stored in the BCM not related to the Climate Control System. These codes can only be found using the DRBIII? scan tool. Entering Self-Diagnostic Mode

ATC DTC's CODE DESCRIPTION 26 ATC IN-CAR TEMPERATURE THERMISTER FAILURE 27 ATC IN-CAR SENSOR FAILURE 34 ENGINE TEMPERATURE MESSAGE NOT RECEIVED 36 ATC CONTROL COMMUNICATION FAILURE

TROUBLE CODES FROM THE MANUAL A/C CONTROL The trouble codes can be checked with the Manual A/C control and the Odometer Display of the Mechanical Instrument Cluster if a DRBIII? scan tool is not available. The Manual A/C Control Head can only be placed into the diagnostic mode while the engine is running and the vehicle is not moving. To place the system into it's diagnostic mode, adjust the Manual A/C Control to the following settings:

1.The engine must be running with vehicle not moving. 2.The Fan Speed set to any speed except OFF. 3.The Temperature Knob in full cold (full counterclockwise position) 4.The mode knob must be placed in defrost position (full clockwise position) 5.The A/C button can be ON or OFF. 6.Press and hold the EBL button until the Mechanical Instrument Cluster Odometer display indicates an "AC00". The body control module (BCM) will chime once and the Manual A/C control A/C button LED will begin blinking. 7.Release the EBL button and wait until the Manual A/C Control A/C button LED stops blinking. This means that the error check and climate control unit door calibration is complete. Diagnostic trouble codes related to the Manual A/C Control and the climate control unit will appear on the odometer display in numerical form after the letters "AC". The diagnostic trouble codes are stored in the BCM and can range between 23 and 51. The odometer display will return to normal operation if no trouble codes are found. If a problem is found, then the odometer will display the letters "A/C" followed by the trouble code number. The odometer display can only show one diagnostic trouble code at a time. Under certain circumstances, more than one diagnostic trouble code could be in the memory. To scroll through any additional diagnostic trouble codes, press the A/C button on the Manual-A/C control. The BCM will beep each time the A/C button is pushed. Continue pushing the A/C button and recording the trouble code numbers until the odometer returns to normal operation (note the letters AC will disappear) It is important that no other knob or button is pushed until all codes are read. Pushing any button except the A/C button or turning a knob will end the diagnostic test without showing the rest of the trouble codes. There also may be other trouble codes stored in the BCM not related to the Climate Control System. These codes can only be found using the DRBIII? scan tool.

MANUAL A/C DTC's CODE DESCRIPTION 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

ERASING DIAGNOSTIC TROUBLE CODES (DTC's) Diagnostic trouble codes can be cleared from the memory two ways:

?The DRBIII? scan tool ?Power to the BCM can be disconnected for ten minutes by disconnecting the battery negative remote cable. If the scan tool is to be used, refer to the proper LH Body Diagnostic Procedures Manual.

CAUTION: Fault code 26 can be created if the in-car sensor thermistor is disconnected while the BCM is operating. This can happen by disconnecting connectors from the BCM or the ATC Control Head when the battery is connected (even if the ignition switch is OFF) To correct, clear the fault code 26 from the BCM.

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