Draining The Fmu - Bosch CH-47976 User Manual

Utilities
Injector Test

Draining the FMU

CAUTION!
It is recommended that you drain the fuel Management Unit after
each use to avoid hazardous situations.
• Do not over tighten the fuel filter
• Do not loosen the filter to drain the Fuel Management Unit
Note: To complete this procedure, the FMU must be connected to the MCU before you begin.
1. Disconnect the FMU from the vehicle's
fuel rail.
2. Navigate to and select Drain Tester.
Follow the on-screen instructions:
• Place drain hose in approved
container.
• Select Continue to start draining.
Draining Tester is displayed. To stop
draining and return to the Main
menu, select Cancel.
36 Active Fuel Injector Tester User Guide
Main Menu
Pressure Test Leak Down Test Vehicle Selection
Drain hose
Interconnect Cable
(To MCU)
Utility Functions
Drain Tester
Update Tester
View Vehicle Info
Injector Locator
TIP: Slowly turning
the FMU upside
down and then right
side up drains the
fuel faster.