Fuel Module Diagnosis; Fuel Module Removal; Fuel Module Installation - Linhai T-Boss 550 Service Manual

CHAPTER 3 ENGINE

Fuel Module Diagnosis:

Step
Switch on Ignition key. Fuel Pump
primes for 3 seconds when the ignition
1 key is ON.
Check for fuel pump running noise for
3 seconds after ignition key is ON.
Disconnect fuel module coupler.
2 Check voltage at harness coupler. Is
the voltage within 10-14V?
Connect 12V DC power supply
(battery) to fuel module.
Make sure that enough fuel available
3
in fuel tank to avoid fuel pump running
dry.
Is the fuel pump running?
Check fuel system pressure at Injector
inlet (with a T-joint) while engine is
4
running in idle condition.
Is the pressure about 300 kPa?
Is the Pressure below 300kPa too
5
much?

3.5.8.5 Fuel Module Removal

● Relieve fuel pressure in fuel lines referring to the 'Fuel Pressure Relief Procedure' (3.5.8.7)
provided in this section.
● Disconnect negative cable at battery.
● Disconnect fuel module wire coupler.
● Drain the fuel in fuel tank thru fuel filler with help of hand pump (siphon). Collect the fuel in
approved container for contamination and safety.
● Disconnect the fuel hoses from fuel module by using standard tools
● Remove the fuel tank from vehicle.
● Place the fuel tank with bottom up condition. Care to be taken not to cause any scratches/
damages on fuel tank.
● Open the fuel module mounting bolts.
● Take out fuel module assembly from fuel tank with care
● Care to be taken not to damage the strainer while removing fuel module from tank.

3.5.8.6 Fuel Module Installation

● Replace the fuel module gasket in fuel module assembly with a new one. Old/ used gaskets
can cause leakages.
● Fold strainer towards fuel pump and insert fuel module in tank opening with care. Care should
be taken not to cause any damages on strainer. Make sure that the fuel tank surface at module
mounting area is clean and free of surface defects.
Action
T-Boss550 SERVICE MANUAL20.0
Yes
If fuel pump running noise
can be heard, go to step 4.
Go to step 3
1.Check electrical circuit
from fuel module to ECU.
2. Check ECU.
Fuel Module Operation
Normal
1. Check for leakages from
hoses, hose joints
2. Check Fuel Pump
3. Check Pressure
Regulator
No
If fuel pump running noise
can not be heard, go to step
2.
Check the electrical circuit
from Ignition to fuel module.
1. Check Fuel Pump Harness
integrity.
2. Check Fuel Pump.
Go to Step 5
1. Clogged Filter
2. Kink/ Blockage in Fuel
Hoses
3. Check Re
CHAPTER 3 ENGINE PAGE. 3- 115