Removal and installation of components of the preheat system

Heating control module

1.7L and 2.0L low pressure turbo engines

The module is installed in the engine compartment, on the left side of the battery support bracket.

1. Disconnect the negative cable from the battery.

2. Lift the module up and off the battery support bracket.

3. Disconnect the electrical wiring from the base of the module and remove the latter from the engine compartment.



4. Installation is carried out in the reverse order.

2.0L High Pressure Turbo Engines

The operation of the system is controlled by the engine control system, a description of the procedures for removing system components is given in Chapter Power and exhaust systems.

Coolant temperature sensor

See Check of serviceability of functioning, removal and installation of electric components of a chain of management of the engine cooling system.

Fuel filter heating element

1. Before starting work, market the availability of the necessary spare parts for sale. Remove fuel filter (see chapter Current service), replace if damaged.

2. Disconnect the negative cable from the battery, then disconnect the electrical wiring from the heating element.


3. Unscrew the central bolt and remove the heating element from the filter housing - the sealing ring must be replaced without fail.

4. Place a new O-ring on the protrusion of the heating element. Install the element on the filter housing, screw in and securely tighten the mounting bolt.

5. Connect the negative cable to the battery. Install the filter in its original place (see chapter Current service).

Temperature-sensitive sensor-switch of the heating element of the fuel filter

1. Before starting work, market the availability of the necessary spare parts for sale. Disconnect the negative wire from the battery, then disconnect the electrical wiring from the sensor-switch screwed into the fuel filter housing.

2. Place a drain container under the filter, or place a rag to collect spilled fuel. Unscrew the sensor-switch - immediately plug the hole for its installation with a suitable plug. Remove the sensor-switch sealing rings, - when assembling the rings, they must be replaced without fail.

3. Plant new O-rings in the sensor switch grooves. Screw the switch switch into the fuel filter housing and tighten it securely. Restore the original wiring connection.

4. Connect the negative cable to the battery.

Relays and fuses

Removal and installation

Relays and fuses are located in the mounting block installed in the engine compartment - see Chapter Onboard electrical equipment.

Examination

Test with relay disconnected

1. Remove the relay. Pins 3 and 5 must be open when 12V power is applied to terminals 1 () and 2 (-) relay, - do not reverse the polarity of the power supply connection!

Test with relay connected

1. With the ignition off, a voltage of 11-14 V must be present at terminal 3, with the ignition on, the same voltage must be present at terminal 1.