Fuel Injection System

Fuel Injection System

• Fuel hoses in the engine compartment may only be secured with spring type clamps appropriate for the model type. The use of clamp or screw type clips is not permissible.

• Hose clip pliers (VAS 6340) or hose clip pliers (VAS 6362) are recommended for installing space saving clamps.

• Read the safety precautions before beginning work. Refer to => [ Safety Precautions ] Fuel Supply.

• Ignition must be turned off when disconnecting the battery. Obtain the radio code for radios with anti-theft codes before disconnecting the battery.

• Observe the safety precautions after connecting battery.

• For trouble free operation of the electrical components a voltage of at least 11.5 volts is necessary.

• Do not use sealants containing silicone. Particles of silicone drawn into the engine, will not be burnt in the engine and damage the oxygen sensor.

• If the engine only starts briefly and then shuts off again after troubleshooting, repairs or component checking, it may be that the immobilizer is blocking the Engine Control Module (ECM). The control module must then be adapted, if necessary.

• It is possible that the ECM will recognize a malfunction and store a Diagnostic Trouble Code (DTC) during some tests. After completing all tests and repairs, the DTC memory should therefore be checked and erased, if necessary. Refer to "Guided Functions" in the vehicle diagnostic tester.

• Vehicles with an airbag are equipped with an emergency fuel shut off system. This is intended to reduce the risk of a vehicle fire following a crash by switching off the fuel pump via the fuel pump control module (J538).

• When the driver side door is opened, the fuel pump is activated for 2 seconds so that pressure builds in the fuel system. This improves comfort of the engine start up behavior.