Cooling System: Service and Repair

WM 192919 Removing and installing control unit for coolant control

Technical values





Preliminary work

NOTICE

Voltage peaks

- Risk of damage to loads or to the control unit

-> Before disconnecting or removing an electrical load, remove the ignition key and switch off the load.

Information

Specifications for wrench sizes (a/f specifications) for screw heads are described as follows:

- Torx screws: (E.) for external Torx, (T.) for internal Torx.

- Hexagon-head bolts (internal and external hexagon): Wrench size (a/f)

1. Remove front right wheel housing liner. -> 505619 Removing and installing front wheel housing liner - section on "Removing" Service and Repair.

Removal

Removing control unit for coolant control

1. Remove control unit -1-.





Control unit for coolant control

1.1. Release cable plug -3- on the control unit -arrow- and pull it off.





Connector for control unit for coolant control

Release:





Releasing cable plug on control unit for coolant control

1.2. Release and unclip remaining plug connections -2, 4 and 5- if necessary.
1.3. Unclip breather hose -1- for radiator from the radiator bracket holder.
1.4. Unscrew external Torx screw (E10, M6 x 16) -2-.





Retaining screw for control unit

1.5. Pull control unit out of the guide -arrow-.





Locking lug for control unit

2. Unscrew two M6 hexagon nuts (a/f 10) -1-.
2.1. Unclip cable -2-.
2.2. Pull the control unit -3- out of the bracket.





Control unit for coolant control removed

Installing control unit for coolant control

1. Fit control unit -3- into the bracket.





Control unit for coolant control removed

1.1. Clip in cable -2-.
1.2. Screw in and tighten two M6 hexagon nuts (a/f 10) -1-.
=> Tightening torque: 10 Nm (7.5 ftlb.)
2. Install control unit.
2.1. Slide control unit and bracket into the guide -arrow-.





Locking lug for control unit

2.2. Fit and tighten external Torx screw (E10, M6 x 16) -2-.
=> Tightening torque: 10 Nm (7.5 ftlb.)





Retaining screw for control unit

2.3. Clip in breather hose -1- for radiator on the radiator bracket holder.
2.4. Clip in and connect cable plugs -2 to 5-.





Control unit for coolant control

2.5. Secure the cable at the clips provided.

Subsequent work

1. Install front right wheel housing liner. -> 505619 Removing and installing front wheel housing liner - section on "Installing" Service and Repair.