Linhai ATV 500-D T3 EFI Service Manual page 170

CHAPTER 3 ENGINE
primes for 3 seconds when the ignition
key is ON.
Check for fuel pump running noise for
3 seconds after ignition key is ON.
2 Disconnect fuel module coupler.
Check voltage at harness coupler.
Is the voltage within 10-14V?
3 Connect 12V DC power supply
(battery) to fuel module.
Make sure that enough fuel available
in fuel tank to avoid fuel pump running
dry.
Is the fuel pump running?
4 Check fuel system pressure at Injector
inlet (with a T-joint) while engine is
running in idle condition.
Is the pressure between 220 ~
270kPa?
5 Is the Pressure below 220kPa?
3.6.2.8.8 Fuel Module Removal:
  R elieve fuel pressure in fuel lines referring to the 'Fuel Pressure Relief Procedure'
provided in this section.
  D isconnect negative cable at battery.
  D isconnect fuel module wire coupler.
  D rain the fuel in fuel tank thru fuel filler with help of hand pump (siphon). Collect the
fuel in approved container for contamination and safety.
  D isconnect the fuel hoses from fuel module by using standard tools
  R emove the fuel tank from vehicle.
  P lace the fuel tank with bottom up condition. Care to be taken not to cause any
scratches/ damages on fuel tank.
  O pen the fuel module mounting bolts.
  T ake out fuel module assembly from fuel tank with care
  C are to be taken not to damage the strainer while removing fuel module from tank.
3.6.2.8.9 Fuel Module Installation:
  R eplace the fuel module gasket in fuel module assembly with a new one. Old/ used
gaskets can cause leakages.
  F old strainer towards fuel pump and insert fuel module in tank opening with care. Care
should be taken not to cause any damages on strainer.
Fuel Module Orientation: Fuel module bolts not symmetrical and can be mounted
only in the intended direction. Regulator side should be facing the Fuel Tank rear
side.
Make sure that the fuel tank surface at module mounting area is clean and free of
surface defects.
  P lace the bolts on module cover and tighten the bolts gradually in star pattern
sequence to apply equal compression on gasket. It is shown as below.
LH500ATV-D T3 EFI SERVICE MANUA 19.0
noise can be heard, noise can not be
go heard, go to step 2.
to step 4.
Go to step 3 Check the electrical
circuit from Ignition to
fuel module.
1. Check electrical 1. Check Fuel Pump
circuit from fuel Harness integrity
module to ECU 2. Check Fuel Pump
2. Check ECU
Fuel Module Go to Step 5
Operation
Normal
1. Check for 1. Clogged Filter
leakages from 2. Kink/ Blockage in
hoses, hose joints Fuel Hoses
2. Check Fuel Pump 3. Check Re
3. Check Pressure
Regulator
CHAPTER 3 ENGINE PAGE. 3- 137