Heating, air conditioner

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety precautions when handling refrigerants
  1
• 1.3 Safety measures when working on vehicles with start/stop system
  2
• 1.4 Safety precautions when working on a high-voltage system
  2
• 1.5 Safety precautions when working in the vicinity of high-voltage components
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions for working on vehicles with auxiliary/supplementary heater
  4
• 2 Identification
  5
• 2.1 Identification of heater and air conditioning unit
  5
• 3 General information
  7
• 3.1 Notes for vehicles with start-stop system
  7
• 3.2 Type plates
  7
• 4 Repair notes
  9
• 4.1 Working on refrigerant circuit
  9
• 4.2 General repair instructions
  9
• 4.3 Refrigerant circuit seals
  9
• 5 Technical data
  11
• 5.1 Capacities for refrigerant R1234yf
  11
• 5.2 Refrigerant oil R1234yf – capacities
  11
• 5.3 Oil distribution
  11
• Heating
  12
• 1 Heating
  12
• Air conditioning system
  13
• 1 Overview of fitting locations - air conditioning system
  13
• 1.1 Overview of fitting locations - components not located in passenger compartment
  13
• 2 Refrigerant circuit
  26
• 2.1 Assembly overview - refrigerant lines
  26
• 2.2 Assembly overview – condenser
  30
• 2.3 Assembly overview - heat exchanger for high-voltage battery
  32
• 2.4 Removing and installing refrigerant circuit pressure sender G805
  32
• 2.5 Removing and installing expansion valve
  34
• 2.6 Removing and installing condenser
  42
• 2.7 Removing and installing desiccant bag or cartridge
  45
• 2.9 Commissioning air conditioning system after filling refrigerant circuit
  56
• 2.12 Removing and installing heat exchanger for high-voltage battery
  63
• 2.13 Removing and installing refrigerant line with internal heat exchanger
  68
• 3 Air conditioner compressor
  91
• 3.1 Assembly overview – air conditioner compressor
  91
• 3.2 Assembly overview - pulley
  94
• 3.3 Removing air conditioning compressor from and installing on bracket
  98
• 3.4 Removing and installing air conditioner compressor
  102
• 3.5 Removing and installing high-voltage system fuse 3 S353
  109
• 3.6 Checking high-pressure safety valve on air conditioner compressor
  109
• 4 Control motors
  117
• 4.1 Overview of fitting locations – control motors at front
  117
• 4.2 Removing and installing defroster flap VX47 control motor
  121
• 4.3 Removing and installing rear temperature flap VX95 control motor
  124
• 4.4 Removing and installing front left temperature flap VX34 control motor
  125
• 4.5 Removing and installing front right temperature flap VX35 control motor
  129
• 4.6 Removing and installing fresh air and air recirculation flap VX96control motor
  133
• 4.7 Removing and installing air distribution flap VX33 control motor
  137
• 4.8 Removing and installing fresh air/air recirculation, air flow flap actuator
  141
• 4.9 Removing and installing air distribution flap actuator
  144
• 5 Front heater and air conditioning unit
  148
• 5.1 Assembly overview – heater and air conditioning unit
  148
• 5.3 Assembly overview – evaporator housing
  154
• 5.4 Assembly overview - flaps and partitions in air distribution housing
  156
• 5.5 Removing and installing heater and air conditioning unit
  158
• 5.6 Dismantling and assembling heater and air conditioning unit
  163
• 5.7 Removing and installing air distribution housing
  164
• 5.8 Removing and installing holder for heater and air conditioning unit
  165
• 5.9 Removing and installing evaporator
  166
• 5.10 Removing and installing fresh air blower control unit J126
  168
• 5.11 Removing and installing dust and pollen filter
  169
• 5.12 Removing and installing fresh air blower V2
  174
• 5.15 Removing and installing heat exchanger
  181
• 5.16 Removing and installing coolant pipes on heat exchanger
  206
• 5.17 Removing and installing evaporator temperature sensor G308
  210
• 5.18 Checking condensation drain
  212
• 5.19 Removing and installing condensation drain
  212
• 6 Air duct
  218
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  218
• 6.2 Removing and installing fresh air intake
  219
• 6.3 Removing and installing cover for fresh air intake
  222
• 6.4 Removing and installing air intake duct
  224
• 6.5 Removing and installing driver side footwell vents
  225
• 6.6 Removing and installing front passenger side footwell vents
  226
• 6.7 Removing and installing rear footwell vent
  227
• 6.8 Removing and installing air duct for rear centre console vent
  228
• 6.9 Removing and installing air duct for defroster vent
  229
• 6.10 Removing and installing air duct for centre dash panel vent
  229
• 7 Coolant circuit
  231
• 7.1 Connection diagram - high-voltage heater
  231
• 7.2 Assembly overview - high-voltage heater (PTC) ZX17
  236
• 7.3 Removing and installing high voltage heater (PTC) ZX17
  237
• 7.4 Removing and installing coolant changeover valve 1 N632
  244
• 7.5 Removing and installing coolant valve for high-voltage battery N688
  244
• 7.6 Removing and installing coolant valve for high-voltage battery V590
  244
• 8 Operating and display unit
  245
• 8.1 Overview of fitting locations – operating and display unit
  245
• 8.2 Removing and installing operating and display unit
  246
• 9 Other controlling and regulating components
  248
• 9.1 Removing and installing heater and air conditioning system control unit J979
  248
• 9.2 Removing and installing sunlight penetration photosensor G107
  249
• 9.3 Removing and installing air quality sensor G238
  250
• 9.4 Working principles of air quality sensor G238
  251
• 9.5 Removing and installing ambient temperature sensor G17
  253
• 9.6 Removing and installing humidity sender for air conditioning system G260
  253
• 9.7 Removing and installing left vent temperature sender G150
  254
• 9.8 Removing and installing right vent temperature sender G151
  255
• 9.9 Removing and installing rear vent temperature sender G174
  257
• 9.10 Removing and installing footwell vent temperature sender G192
  257
• 9.11 Removing and installing vehicle interior temperature sensor G1090
  258