Fuel Injection System, Servicing

Fuel Injection System, Servicing

NOTE:
- The Engine Control Module (ECM) is equipped with On Board Diagnostics (OBD). Before repairs such as fault finding, check the DTC memory first. Also the vacuum hoses and connections must be checked (unmetered air).
- 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 burnt in the engine and 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 clips. The use of clamp or screw-type clips is not permissible.







- VAS 5024A spring clip installation tool is recommended for installing spring-type clips.
- During some checks it is possible that the control module will detect and store a malfunction. 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,
- Then generate readiness code.