XJ-6 L6-4.2L (1983)
Ambient Temperature Sensor / Switch HVAC: Technical Service Bulletins
A/C - Flap Adjustment
DATE . . . APRIL, 1985
NUMBER . . . J85/24
MODEL:
XJ6 & XJ-S
SUBJECT: AIR CONDITIONING FLAP ADJUSTMENT
KEY POINTS:
PROCEDURE FOR TEMPERATURE DIFFERENTIAL AND FLAP LINKAGE SETTING
AIR CONDITIONING AND CLIMATE CONTROL TEMPERATURE REGULATION ADJUSTMENTS
SYMPTOM: Temperature difference between temperature switch setting and in-car temperature excessive.
Temperature difference between upper level and lower level excessive.
CHECK IN-CAR TEMPERATURE
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Set temperature differential thumbwheel to center.
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Select 75~ and "AUTO".
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Run engine and allow system to stabilize (minimum 10 minutes).
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Measure in-car temperature at 75~ selected, "AUTO" mode measured at in-car sensor should be 75~
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If out of tolerance (adjust amplifier potentiometer).
CHECK DIFFERENCE BETWEEN UPPER SIDE VENT AND LOWER FOOTWELL VENT TEMPERATURE
Production Set-Up Tolerance
Temperature set at 75~F, mode switch set at "AUTO", system stabilized.
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Adjust temperature selector until footwell outlet duct measures 90~F.
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With temperature differential thumbwheel fully left, upper duct temperature should measure 60~F +/- 3~.
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With temperature differential thumbwheel fully right, upper duct temperature should measure 80~F +/- 3~.
In Service Check
Temperature set at 75~F, mode switch at "AUTO", temperature differential thumbwheel in center and system stabilized.
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Measure outlet duct temperatures.
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Maximum temperature difference between upper and lower = +/- 4~F.
If Incorrect
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Remove R/H kick panel and duct trim.
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Remove glove box.
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Remove R/H lower outlet duct.
ADJUSTMENT PROCEDURE
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Connect a vacuum supply to the A/C vacuum supply hose.
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Select "DEFROST" and turn on ignition. Servo will move to full hot limit.
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Turn off ignition and select "HIGH".
BASIC ADJUSTMENT