Test 3: Checking The Turbocharged Air Inlet Circuit - Suzuki Grand Vitara 2011 Manual

Test 3: Checking the turbocharged air inlet circuit

Step
1 Engine stopped: Check the low and high pressure air circuits
for leaks (air leaks in or out, before and after the
turbocharger). Look for parts of the system that are
abnormally greasy, indicating leakage.
Check:
• The condition and fitting of the ducts (foreign bodies,
clogged, disconnected, pinched, broken, holed, cut,
tightness of the mounting bolts, etc.).
• The presence, condition and fitting of the seals.
• The presence and tightening of the clamps.
• The fitting of the boost pressure sensor.
Is there in good condition?
2 Checking the air filter.
Check:
• The air filter unit inlet and outlet are not blocked.
• The condition and the assembly of the air filter unit
(disconnected, broken, with holes, etc.).
• The cleanliness, conformity and the non-distortion of the
filter element.
• The MAF sensor: apply test 4.
Is there in good condition?
3 Checking the inlet throttle valve.
Check:
• The condition of the inlet throttle valve.
• The tightness of the mounting bolts.
• Cracks in the damper valve.
Is there in good condition?
4 Check that there is no leak on the exhaust manifold, in
particular at the exhaust manifold/turbocharger interface.
Check the exhaust system: apply test 1 referring to "Test 1:
Exhaust system check: For Diesel Engine Model".
Is there in good condition?
5 Check the condition of the intercooler:
• Clogging,
• Leaks (vehicle stationary, stabilise the engine speed
between 3500 rpm and 4000 rpm and check that there
are no leaks).
Engine General Information and Diagnosis: For Diesel Engine Model 1A-370
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Air inlet circuit correct.
S6JB0A1124168
No
Carry out the necessary
repairs.
Carry out the necessary
repairs.
Carry out the necessary
repairs.
Carry out the necessary
repairs.
Replace the intercooler.