FULL AUTO AIR CONDITIONER
Symptom
conditioner does
operate when the
gnition switch in the
position.
nterior temperature
not raise
No warm air coming
nterior temperature
not lower
No cold air coming
Probable cause
Open-circuited power circuit harness
Defective control panel
Defective air conditioner control unit
Defective room-temperature sensor
input circuit
Defective air mix damper
potentiometer input circuit
Remedy
Correct harness.
Replace control panel.
Check diagnosis output.
Check diagnosis output.
Replace defective parts.
Defective air mix damper drive motor
Replace air mix damper drive
motor.
Incorrect engagement of air mix
damper drive motor lever and air mix
damper
Engage correctly.
Sticking air mix damper
Open-circuited harness between air
mix damper drive motor and air
conditioner control unit
Defective control panel
Defective air conditioner control unit
Correct air mix damper.
Correct harness.
Replace control panel.
Replace air conditioner
control unit.
Defective room-temperature sensor
input circuit
Defective outside-air-temperature
sensor input circuit
Check diagnosis output.
Replace defective parts.
Defective air
sensor input
circuit
Defective refrigerant-temperature
sensor input circuit
Defective air mix damper
potentiometer input circuit
Defective photo sensor
Replace photo sensor.
Defective air mix damper drive motor
Replace air mix damper drive
motor.
Incorrect engagement of air mix
damper drive motor lever and air
mix damper
Engage correctly.
Sticking air mix damper
Open-circuited harness between air
mix damper drive motor and air
conditioner control unit
Open-circuited harness between
photo sensor and air conditioner
control unit
Correct air mix damper.
Correct harness.
Correct harness.
Defective air-conditioner compressor
Replace.
relay in the relay box
TSB Revision
Ref. page
55-56
55-56
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Summary of Contents for 3000GT 1991
Page 1: ...Volume lm I k 6 I I I Engine Chassis Body f...
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Page 53: ...ENGINE General Information II 3 UBRICATION SYSTEM 7LUOO25 TSB Revision...
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Page 604: ...27 8 REAR AXLE AWD Special Tools SPECIAL TOOLS MZ DA MB990799 01 TSB Revision...
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Page 707: ...REAR SUSPENSION AWD Special Tools 34 21 I id TSB Revision...
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Page 876: ...42 4 BODY SDecial Tools SPECIAL TOOLS M42DA remover TSB Revision...
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Page 942: ...EXTERIOR SDecial Tools SPECIAL TOOLS MBlKG I system inspectlon MB991 359 TSB Revision...
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