Cooling System (Mechanical)

• Adjustment - Replacement
  • Filling & Bleeding Cooling System
  • Radiator, 4-CYL.
    • To remove
    • To fit
  • Oil Cooler, 4-CYL.
    • To remove
    • To fit
  • Charge Air Cooler, 4-CYL.
    • To remove
    • To fit
  • Thermostat, 4-CYL.
    • Notes
    • To remove
    • To fit
  • Coolant, 4-CYL.
  • Expansion Tank, 4-CYL.
    • Notes
    • To remove
    • To fit
  • Radiator Fan, 4-CYL.
    • Notes
    • To remove
    • To fit
  • Fan Motor
    • To remove
    • To fit
  • Coolant Pump, 4-CYL.
    • Notes
    • To remove
    • To fit
• Component Location
  • Motor, Radiator Fan, Left (37LH)
  • Motor, RH Radiator Fan (37RH)
  • Relay, High Speed, LH Fan (81)
  • Relay, Low-Speed, 2 Radiator Fans (155)
  • Temperature Sensor, Coolant (202)
  • Relay, RH Radiator Fan, High Speed (396)
  • Main Instrument Unit (540)
  • TRIONIC Control Module, 4-CYL Petrol (589)
  • PSG16 Control Module, Connector M (595M)
  • A/C Pressure Sensor (620)
  • Dice Control Module (628)
  • Control Module, V6 Diesel, Contact A (655A)
  • Control Module, V6 Diesel, Connector B (655B)
  • Connector H43-1
  • Crimp Connection J3, Front Harness
  • Crimp J5, Front Wiring Harness
  • Crimp J17, Petrol Engine Harness
  • Crimp J25, Diesel Engine Wiring Harness V6
  • Crimp Connection J150, Front Wiring Harness
  • Crimp J222, Front Harness
  • Grounding Point G30
    • Notes
    • Connected components
  • Grounding Point G40
    • Notes
    • A. Connected components of LHD car
    • B. Connected components of RHD car
  • Grounding Point G42
    • Notes
    • A. Connected components of LHD car
    • B. Connected components of RHD car
• Fault Diagnosis
  • Diagnostic Trouble Code Table
  • B1100: Low Speed Radiator Fan Relay - Short To B+; Low Speed Radiator Fan Relay - Open Circuit/Short To Ground
    • Notes
    • Fault symptoms
    • Conditions
    • Diagnostic help
    • Check the wiring
  • B2190: High Speed Radiator Fan Relay 1 - Short To B+; High Speed Radiator Fan Relay 1 - Open Circuit/Short To Ground
    • Notes
    • Fault symptoms
    • Conditions
    • Diagnostic help
    • Check the wiring
  • B2195: High Speed Radiator Fan Relay 2 - Short To B+; High Speed Radiator Fan Relay 2 - Open Circuit/Short To Ground
    • Notes
    • Fault symptoms
    • Conditions
    • Diagnostic help
    • Check the wiring
• Fault Diagnosis, General
  • Fault Diagnosis Strategy For Electronic Systems
    • Notes
    • General fault diagnosis in electronic systems
      • Control module
      • Outputs
      • Inputs
  • Tech 2 Menu Structure, Dice
  • Before Changing A Control Module
  • Testing For Open/Short Circuits
    • General
    • Testing for open circuits by measuring voltage.
    • Testing for open circuits by measuring resistance
    • Testing for short circuits to ground
• Fault Diagnosis, Symptoms
  • Coolant Leak From Hoses
    • Fault symptoms
    • Conditions
    • Diagnostic procedure
  • Radiator Fan Operation Faulty
    • Notes
    • Fault symptoms
    • Diagnostic help
    • Check the wiring
  • Before Changing A Control Module
  • Leakage, Coolant Pump
    • Fault symptoms
    • Conditions
    • Diagnostic procedure
• Special Tools
  • 30 05 477 Cooling System Tester
  • 30 07 739 Hose Pinch-Off Pliers
  • 83 95 212 Strap
  • 83 95 254 Drawbar Handle, Hydraulic Belt TENSIONER
  • 86 12 079 Toolbox, Wiring Harness
• Technical Data
  • Radiator Fan Motor
  • Coolant
  • Temperature/Pressure Limits
  • Tightening Torques
  • List Of Lubricants
• Technical Description
  • Cooling System Diagram, 4-CYL.
    • Notes
    • Components
  • System Overview, 4-CYL.
    • Notes
    • Brief description
  • Coolant, 4-CYL.
    • Notes
    • Coolant flow
      • Thermostat closed
      • With the thermostat normally open (1)
      • With the thermostat fully open (2)
  • Radiator Fans, 4-CYL.
    • Notes
    • One radiator fan (cars without A/C)
    • Two radiator fans (cars with A/C)
    • Operation, one radiator fan (cars without A/C)
    • Operation, two radiator fans (cars with A/C)
    • Operation with ignition ON
      • Notes
      • One radiator fan (cars without A/C)
      • Two radiator fans (cars with A/C)
      • Diagnostics
    • Operation with ignition OFF
      • Notes
      • The radiator fan runs at high speed when ignition is turned from ON to OFF