Entering Self-Diagnostic Mode; Manual A/C Control Head - Chrysler 2000 LHS Owner's Manual

LH
DIAGNOSIS AND TESTING (Continued)
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
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 cli-
mate 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 turn-
ing 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.
Fig. 4 Entering Self-Diagnostic Mode
1 – PRESS BUTTONS SIMULTANEOUS
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
tool is not available. The Manual A/C Control Head
DESCRIPTION
HEATING AND AIR CONDITIONING
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 coun-
terclockwise position).
(4) The mode knob must be placed in defrost posi-
tion (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 but-
ton 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.
Fig. 5 Manual A/C Control Head
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 let-
ters "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" fol-
lowed by the trouble code number. The odometer dis-
play 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 con-
trol. The BCM will beep each time the A/C button is
pushed. Continue pushing the A/C button and record-
ing 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
scan
button is pushed until all codes are read. Push-
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