Fault Finding-Tests; Test 1: Exhaust System Check - Suzuki Grand Vitara 2011 Manual

1A-367 Engine General Information and Diagnosis: For Diesel Engine Model
Step
9 Check the engine timing (and the position of the high
pressure pump sprocket).
Is there in good condition?
10 Check the engine mount condition referring to "Engine
Mounting Components: For F9Q Engine in Section 1D".
11 Are the compressions correct?
12 Start the engine, engine at idling speed. Record "Fuel
pressure", "Engine speed" and "Metering unit duty" on Data
List of SUZUKI scan tool for 30 seconds.
Does the fuel pressure difference between min. and max.
less than 50 bar?
Table 10: Oil leaks from the turbocharger
CAUTION
!
In case of replacing turbocharger, risk of destroying the new turbocharger and the engine if the air
circuit is not cleaned and the oil and its filter are not replaced.
Troubleshooting
Step
1 At idling speed, check if the turbocharger is leaking from the
turbocharger oil supply inlet or outlet, from the turbocharger
inlet or outlet or from the compressor and the rear plate of
the compressor sump.
Is there in good condition?
2 If the leak is at the inlet or outlet of the turbocharger or of the
compressor. Check manually if the axial play is normal or
excessive referring to "Test 6: Rotating part of a
turbocharger: For Diesel Engine Model".
NOTE
It is normal to find traces of oil at the
turbocharger inlet and outlet, as the air passing
through the compressor is loaded with oil from
the engine rebreathing circuit.
Is the axial play normal?

Fault Finding-Tests

Some specific checks are grouped together into tests and are performed as required in the various fault finding tables
or when interpreting faults.

Test 1: Exhaust system check

Test 2: Low pressure circuit check
Test 3: Checking the turbocharged air inlet circuit
Test 4: MAF sensor
Test 5: Variable geometry turbocharger control
Test 6: Rotating part of a turbocharger
Test 7: EGR valve
Test 8: Injector malfunction
Action
Action
Yes
Go to Step 10.
Go to Step 11.
Go to Step 12.
End of fault finding.
Yes
Go to Step 2.
If the leak is on the
exhaust side plate
(turbine side). Replace
the turbocharger.
No
Carry out the required
repairs.
Repair if necessary.
Carry out the required
repairs.
Substitute a known-
good ECM and recheck.
S6JB0A1124163
No
Replace the seal of the
leaky pipe or channel.
Replace the
turbocharger and check
that the turbocharger oil
supply circuit is not
blocked.
S6JB0A1124164