General notes for Diesel-Direct Fuel Injection System
NOTE:
- Engine Control Module (ECM) is equipped with On Board Diagnostic (OBD). Always check DTC memory first, before performing repairs or troubleshooting. Vacuum hoses and connections should also be checked (false 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 sensors.
- 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.
- Vacuum hoses must not be clogged or kinked.
- VAS 5024A spring clip installation tool is recommended for installing spring-type clips.
- Components marked with * are tested via On Board Diagnostic (OBD). Refer to Diagnostic mode 3: Check DTC Memory
- 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. Refer to Diagnostic mode 3: Check DTC Memory
- Erase DTC memory. Refer to Diagnostic mode 4: Reset/erase diagnostic data
- For completion, generate readiness code. Refer to Readiness code, generating
Safety precautions. Refer to Safety precautions .
Rules of cleanliness. Refer to Rules of cleanliness .