Operation CHARM
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Honda
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1992
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Prelude L4-2.2L SOHC
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Repair and Diagnosis
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Heating and Air Conditioning
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Control Assembly
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Adjustments
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Def Door Adjustment
Def Door Adjustment
DEF Door Adjustment
Set the heater control switch on HEAT for adjusting DEF leak (shut 20%).
1.
Loosen the adjusting screw.
2.
Adjust the heater linkage.
3.
Tighten the adjusting screw.