Chrysler 300M 2002 Service Manual page 1641

24 - 4 HEATING & AIR CONDITIONING
HEATING & AIR CONDITIONING (Continued)
ATC AND MTC DTC'S
CODE
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
MTC DTC'S
CODE
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
DESCRIPTION
DESCRIPTION
ATC DTC'S
CODE
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 ATC HEAD
The trouble codes can be checked with the ATC
control if a DRBIII scan tool is not available. The
control head can only be placed into the diagnostic
mode while the engine is running and the vehicle is
not moving. Set the control to a 75° F setting (so
there is no confusion with the 23-51 Diagnostic Trou-
ble Codes (DTC's) (Fig. 1).
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 (C or F). Diag-
nostic 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 con-
trol. It is important that no other knob or but-
ton is pushed until all codes are read. Pushing
any button except Panel Mode or turning a
knob will end the diagnostic test without show-
ing 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.
TROUBLE CODES FROM THE MTC HEAD
The trouble codes can be checked with the MTC
head and the Odometer Display of the Mechanical
Instrument Cluster if a DRBIII
available. The MTC Head can only be placed into the
DESCRIPTION
scan tool is not
LH