Fuel Delivery and Air Induction: Description and Operation

Fuel Injection, Servicing

General Notes on Fuel Injection

NOTE:
- The Engine Control Module (ECM) is equipped with an On Board Diagnostic (OBD) Always check DTC memory first, before performing repairs or troubleshooting. Vacuum hoses and connections should also be checked (unmetered air).
- For the electric components to work properly, a voltage of at least 11.5 V is required.
- Do not use any silicone sealant. Traces of silicone components which are sucked into the engine are not burned there, and they damage the oxygen sensor.
- The battery must only be disconnected and connected with the ignition switched off, since the Engine Control Module (ECM) can otherwise be damaged.
- Fuel hoses at engine must only be secured with spring-type clamps. The use of clamping collars or screw clamps is not permitted.







- VAS5024A spring clip installation tool is recommended for installing spring-type clips.
- It is possible that the control module will recognize a malfunction and store a DTC during some tests. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs.
- Check DTC memory, Diagnostic mode 3: Check DTC Memory,
- Erase DTC memory, Diagnostic mode 4: Reset/erase diagnostic data
- For completion, generate readiness code.

Safety precautions. Safety Precautions
Rules of cleanliness. Vehicle Damage Warnings