Engine Management System
•
Make sure to perform work in well-ventilated area and away from any
open fire/flames.
•
Wear Safety glasses
•
To relieve fuel vapor pressure in fuel tank, remove fuel filler cap and then
reinstall it.
•
To relieve pressure in the fuel lines, disconnect the power to the pump, pull the
spark plug boot off the plug and place it away from the plug. Crank the engine to
release the pressure in the lines.
•
After servicing, make sure that the fuel hoses and clamps are connected
according to the hose fitment instructions given in vehicle instruction manual.
•
Check for any fuel leakage.
•
Fill the fuel tank with at least 3 liters of fuel, then turn on the ignition switch to
cycle the pump and prime the system.
Fuel Module Diagnosis
1
Switch on Ignition key. Fuel Pump
primes for 3 seconds when the
ignition key is ON.
Check for fuel pump running noise
for 3 seconds after ignition key is
pump running?
Go to step 4
Go to step 2
2
Disconnect fuel module coupler.
Check voltage at harness coupler.
Is the voltage within 10-14V?
Go to step 3
circuit from ignition
to fuel module
3
Connect 12V DC power supply
(battery) to fuel module.
Make sure that enough fuel is
available in the fuel tank to avoid
the fuel pump running dry. Is the
fuel pump running?
circuit from fuel
module to ECU
Check ECU
Harness integrity
Check Fuel Pump
4
Check fuel pressure pattern at
injector.
Pull Injector off the manifold and
place it into a suitable catch can
for Gasoline. Crank the engine
over and watch the spray pattern.
Fuel Module
operation is normal
Check for blockage
or a clogged tip of
the injector.
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