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Utilities
Active Fuel Injector Tester User Guide
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.
Main Menu
Utility Functions Vehicle SelectionPressure Test Leak Down Test
Drain Tester
Update Tester
View Vehicle Info
Injector Locator
Injector Test
Fuel Manag ement Un it
POWER
Drain hose
Interconnect Cable
(To MCU)
TIP: Slowly turning
the FMU upside
down and then right
side up drains the
fuel faster.
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