Honda Actuation Test -Fuel Pump off by Launch X431

It is very necessary to release the fuel pressure before open any fuel hose and parts.So here i write this instruction on how to make fuel pump off before fuel replacement by Launch X431.More Launch X431 Training article,please check here:Launch X431 user guide

 

 

Procedures:

Connect Launch X431 to Honda vehicle.

Honda Actuation Test -Fuel Pump off by Launch X431 (1)

First step,check and make sure no trouble code otherwise the actuation test will unsuccessful.

Honda Actuation Test -Fuel Pump off by Launch X431 (2)

Then select [Actuation Test]

Honda Actuation Test -Fuel Pump off by Launch X431 (3)

Select [Fuel Pump Off],this function manually stop the fuel pump.

Honda Actuation Test -Fuel Pump off by Launch X431 (4)

Start the engine

Please ensure the gear shift is in Neutral

Parking Brake is Applied

Do not press the throttle pedal

Honda Actuation Test -Fuel Pump off by Launch X431 (5)

The condition of stop the fuel pump:Engine speed <1000RPM

Honda Actuation Test -Fuel Pump off by Launch X431 (6)

We just wait for engine speed droop

The fuel pressure has been relieved

Turn the ignition switch off

Honda Actuation Test -Fuel Pump off by Launch X431 (7)

And please not:the fuel pressure will be restored if the ignition is switch on.

Now you can disconnect Launch X431 to start fuel replacement work

Open the fuel hose with minimum leak

Honda Actuation Test -Fuel Pump off by Launch X431 (8) Honda Actuation Test -Fuel Pump off by Launch X431 (9)

 

Install all parts back on your vehicle,turn ignition on and start.

All back to normal.

Honda Actuation Test -Fuel Pump off by Launch X431 (10)