High Pressure Fuel Injector Control Module (HDEV)

Is there a Test Plan available for the HDEV? ________________________________
Select Control Unit Functions (MED 9.2.1), Diagnosis Requests. Is there a status under the "Part Functions" column for observing the HDEV injector output? __________________
What are the pin and connector numbers at the ECM (1 or 2) for the fuel injector output request? Connector _____________ Pins _______________
____________ ____________

____________ ____________
Record the voltage value at one of these pins with:
The engine not running (ignition on). _________ V

Engine running at idle speed. __________ V

Rev engine up to 2000 RPM. __________ V
What are the pin and connector numbers at the HDEV (1 or 2) for the output control of one of the fuel injectors? Connector ___________________ Pins ___________________
voltage ground

Ask the Instructor for assistance:
Using the ground pin of this fuel injector at the HDEV, record the voltage value with:
The engine not running (ignition on). _____________ V

Engine running at idle speed. ____________ V

Rev engine up to 2000 RPM. ______________ V
Use the MFK 2 cable to observe a scope pat-
tern from the same pin and record that pattern on the right (engine at idle speed) .

Hint: Start out with a scope setting of 10Hz at 100 V for MFK 2 (Channel B) .

Increase the engine speed to 2000 RPM and observe pattern .

Fig 1: High Pressure Fuel Injector Control Module (HDEV) Display
Courtesy of BMW OF NORTH AMERICA, INC.

HDEV activation (sample shown to the right):

Fig 2: HDEV Activation Graph
Courtesy of BMW OF NORTH AMERICA, INC.