Fuel Delivery and Air Induction: Description and Operation

Fuel Injection, General Information

NOTE:
- The engine control module is equipped with On Board Diagnostic. Before carrying out repairs and troubleshooting the DTC memory must be checked. Also the vacuum hoses and connections must be checked (unmetered air).
- Fuel hoses in engine compartment must only be secured with spring type clips. The use of clamp or screw type clips is not permissible.
- Components marked with * are checked via the On Board Diagnostic (OBD), checking and erasing DTC memory.
- Components marked with **can be checked with the Output Diagnostic Test Mode (DTM).
- For trouble-free operation of the electrical components, a voltage of at least 11.5 V is necessary.
- Do not use sealants containing silicone. Particles of silicone drawn into the engine, will not be burned in the engine and damage the Oxygen sensor.
- If the engine starts, runs for a short period and then stops, after troubleshooting, repairs or component tests, then the malfunction may lie with the immobilizer which is blocking the engine control module. The DTC memory must be interrogated and if necessary the control module matched.
- During some checks it is possible that the control module will recognize and store a DTC. Therefore after completing all checks and repairs the DTC memory must be interrogated and if necessary erased, checking and erasing DTC memory.
- Vehicles with an airbag are installed with a crash/fuel shut-off. It reduces the risk of a vehicle burning in the event of a crash in that the fuel pump is switched off by the fuel pump relay. At the same time this device improves the starting of the engine because as soon as the door is opened the fuel pump is activated to build-up pressure in the fuel system.

Safety precautions Technician Safety Information
Rules for cleanliness [1][2]Technician Safety Information