Suzuki GRAND VITARA 2005 Service Manual page 145

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Step
3
CONFIRMATION OF THE FAULT FINDING FOR THE
CORRECTION OF THE FLOW, INJECTOR BY INJECTOR:
Clear the fault(s) and carry out a test with the engine at idle
speed, coolant temperature > 80 °C, 176 °F and check that
no faults appear on the diagnostic tool and the fuel flow
correction values do not reach ± 5.0 mm
the repair.
• If any other cylinders have injector fuel flow correction
values > ± 5.0 mm
procedure in Step 2 of this test.
• If the repairs carried out have not repaired the engine,
substitute a known-good ECM and recheck.
Is there in good condition?
4
INJECTOR RETURN FLOW BALANCE CHECK:
• Allow the engine to heat up to a coolant temperature of >
80 °C, 176 °F.
• Switch OFF the ignition.
• Protect the upper engine edges with rags (mainly around
the injectors).
• Disconnect the injector return pipes.
• Connect special tool (09912 – 96540) to injector.
• Start the engine and let it idle.
• Disconnect the fuel pressure regulator.
• Start the ignition and perform a starting sequence
(activate the starter motor for 5 seconds),
• The flow of fuel on the return is normally very weak.
Otherwise, replace the injector.
• Clear the fault caused by the disconnection of the fuel
flow actuator.
• Refit the injector fuel return pipes after checking that the
seals and pipes are in good condition.
• If this is not the case, replace the injector fuel return
pipes.
• Confirm the repairs by means of a road test.
Special tool
(A): 09912–96540
Is there in good condition?
Action
3
/stroke to confirm
3
/stroke, follow the fault finding
Engine General Information and Diagnosis:
Yes
Go to step 4.
Go to Step 5.
1A-113
No
Repair as necessary.
Repair as necessary.
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