83 Climate Control System

Maintenance Jobs - 1986 through 1993

• 8312 - Checking, correcting A/C refrigerant charge
• 8381 - Replacing dust filter for heating/ventilation
• 8382 - Replacing active charcoal filter
• 8383 - Replacing recirculating air filter

Maintenance Jobs - 1994 through 1995

• 8312 - Checking, correcting A/C refrigerant charge
• 8381 - Replacing dust filter for heating/ventilation
• 8382 - Replacing active charcoal filter
• 8383 - Replacing recirculating air filter
• 8384 - Replacing activated charcoal prefilter
• AP83_00-8381 - Replacing dust filter for heater/ventilation

Service Information

• 83/83 - Conversion of R12 to environmentally friendly R134a

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General, technical data and Miscellaneous

• 00-005 - Instructions for use of Service Manual
• 00-010 - Engine and Vehicle Identification
• 00-015 - Vehicle Identification Number Locations
• 83-040 - Grille on air inlet removal and installation - same as 83-140
• 83-140 - Grille on air inlet removal and installation (also see Ian's write-up)

Section I - Heating and Ventilation

• 83-522 - Removal and installation of heat exchange
• 83-525 - Checking oil level in A/C compressor
• 83-530 - Removal and installation of A/C compressor
• 83-532 - Removal and installation of speed sensor on A/C compressor

Section I - Air Conditioning I

• 83-534 - Replacing shaft seal on A/C compressor
• 83-536 - Removal and installation of electromagnetic clutch, removal, installation and checking of solenoid coil
• 83-537 - Removal and installation of series resistor for auxiliary fan
• 83-538 - Removal and installation of condenser
• 83-540 - Removal and installation of fluid reservoir
• 83-542 - Testing, removal and installation of pressure switch for A/C compressor in fluid reservoir
• 83-544 - Testing, removal and installation of pressure switch for auxiliary fan in fluid reservoir
• 83-546 - Testing, removal and installation of evaporator temperature sensor
• 83-547 - Testing, removal and installation of outside air temperature sensor
• 83-552 - Removal and installation of expansion valve
• 83-554 - Removal and installation of evaporator
• 83-556 - Removal and installation of blower motor (also see Ian's write-up)
• 83-558 - Removal and installation of air conditioning/automatic temperature control unit (up to 8/87)
• 83-560 - Removal and replacement of auxiliary fan
• 83-562 - Testing, removal and installation of switch for air conditioning/automatic temperature control (up to 8/87)
• 83-564 - Testing, removal and installation of switch for fresh air/recirculated air (up to 8/87)
• 83-566 - Removal and installation of switch-over valve (Y13/1) or 4-point valve block (Y11) for fresh air/recirculated air flap
• 83-568 - Removal and installation of vacuum elements
• 83-570 - Testing, removal and installation of speed sensor on starter ring gear (model 124.1)

Section II - Air Conditioning II

• 83-600 - Description of function of automatic climate control
  • Select page... A. General B. Automatic climate control unit (N22) C. Electronic blower regulator (N29) D. Function of blower regulation with various function selections E. Control of air flaps and air flow F. Temperature sensor interior air and ventilation blower G. Arrangement of vacuum elements and switchover valve block H. Arrangement of plug connectors (X26, X26/6, X64) on cable harness I. Refrigerant compressor and function of the compressor shut-off K. Auxiliary fan and control of auxiliary fan L. Fault display by impulse output (as of 09/87) M. Vacuum function diagrams N. Residual engine heat utilization (MRA)
• 83-601 - Checking functions of automatic climate control
  • Select page... General notes 1. Defrosting 2. Total ventilation in cooling operation 3. Normal adjustment in cooling operation 4. Normal adjustment in regulating operation 5. Economy in heating operation 6. Blower minimum 7. Blower maximum
• 83-602 - Checking regulating quality and heating output
• 83-603 - Testing the automatic climate control with the impulse counter (as of 9/87)
• 83-604 - Checking electric components of the automatic climate control
  • Select page... Note and test prep 1 Chk temp snsr interior air (B10/4) w/ cables 2 Chk temp snsr outside air (B10/5) w/ cables 3 Chk temp snsr evaporator (B10/6) w/ cables 4 Chk temp snsr heat exchanger (B10/1) w/ cables 5 Chk temp snsr coolant (B11/7 or B10/8) w/ cables 6 Chk switchover valve block 7-fold (Y7) and cables 7 - Chk mono valve (Y19) and cables Prep for test step 8 - 21 8 Chk voltage supply for control unit 9 Chk Hall sensor (B6) w/ cables 10 Chk gnd actvtn by recirc air switch (S24) 11 Chk gnd actvtn mono valve (Y19) 12 Chk gnd actvtn circ pump (M13) 13 Chk gnd actvtn s/o vlv fresh/recirc flap, sml (Y7.1 14 Chk gnd actvtn s/o vlv fresh/recirc flap, lrg (Y7.2) 15 Chk gnd actvtn s/o vlv footwell flap (Y7.3) 16 Chk gnd actvtn s/o vlv ctr flap (Y7.4) 17 Chk gnd actvtn s/o vlv defroster flaps, lrg (Y7.5) 18 Chk gnd actvtn s/o vlv diverter (Y7.6) 19 Chk gnd actvtn s/o vlv defroster flaps, sml(Y7.7) 20 Chk cntrl V for blower regulator (N29) 21 Chk gnd actvtn for refrig comp (Y5)
• 83-605 - Checking compressor cutoff and remedial measures
  • Select page... General notes A. Checking compressor cutoff if electromagnetic coupling of refrig cmprsr is not switched on B. Checking the cut-out of electromagnetic coupling of refrig cmprsr via cut-out control unit (N6) C. Checking the cut-out of electromagnetic coupling of refrig cmprsr via engine control unit (MAS) D. Checking the cutoff of electromagnetic coupling of refrig cmprsr via the base module (GM)
• 83-606 - Electric circuit diagrams
• 83-607 - Checking refrigerating capacity (short test)
• 83-608 - Checking refrigerating capacity and suction/high pressure
• 83-620 - Checking flap control vacuum system for leaks
  • Select page... General notes and diagram A. Checking check valve (36) and vacuum reservoir (37) for leaks (except w/ diesel engine) Preparing test B through E B. Checking vacuum circuit 1, valve block (Y7) for leaks C. Checking vacuum circuit 2, vacuum elements for fresh/recirculated air flap (42) for leaks D. Checking vacuum circuit 3, vacuum element for footwell flaps (39) for leaks E. Checking vacuum circuit 4, vac elements defroster (38), center (40), diverter flaps (41) for leaks
• 83-622 - Removal and installation of heat exchanger
• 83-625 - Removal and installation of mono valve (Y19) or heating system supply unit (A31)
• 83-630 - Removal and installation of heating water circulating pump (M13 or A31m1)
• 83-635 - Automatic climate control unit
  • Select page... A. Removal and installation B. Renewing lighting bulbs C. Removal and installation of temperature selector wheel (without potentiometer)
• 83-637 - Removal and installation of aspirator blower (M9) for temperature sensor interior air
• 83-640 - Removal and installation, testing of temperature sensor interior air
• 83-645 - Removal and installation, testing of temperature sensor heat exchanger
• 83-646 - Removal and installation, testing of temperature sensor evaporator
• 83-647 - Removal and installation, testing of temperature sensor outside air
• 83-648 - Removal and installation, testing of fresh/recirculated air switch
• 83-660 - Removal and installation of switchover valve block
• 83-665 - Removal and installation of vacuum elements
  • Select page... A. Vacuum element (38) for defroster nozzle flaps B. Vacuum elements (39) for footwell flaps C. Vacuum element (40) for center nozzle flap D. Vacuum element (41) for diverter air flap E. Vacuum element (42) for fresh/recirculated air flap left or right
• 83-670 - Removal and installation of electronic blower regulator
• 83-675 - Removal and installation of Hall-sensorq

Supplement A

• Supplement A - Model Year 1986, Model 124 Automatic climate control
  • Select page... General information and operation Location of components Automatic climate control test program Testing compressor protective cutout

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