Fuel Delivery and Air Induction: Description and Operation

General Notes For Diesel-Direct Fuel Injection System

NOTE:
- The control module for Diesel-Direct Fuel Injection System 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.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.
- Always switch ignition off before disconnecting or connecting battery, as failure to do so may damage the control module for Diesel-Direct Fuel Injection System.
- 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.
- Components marked with * are tested via On Board Diagnostic (OBD), 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, Diagnostic mode 3: Check DTC Memory,
- Erase DTC memory, Diagnostic mode 4: Reset/erase diagnostic data
- For completion, generate readiness code.