Diagnostic procedure

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DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Is the noise from the turbocharger?	Yes	Go to Step 8.
1	Is the noise from the turbocharger?	No	Go to the next step
2	Is squeal, click or chirp sound present?	Yes	Inspect the engine oil level, solenoid valves installation or drive belt tension.
2	Is squeal, click or chirp sound present?	No	Go to the next step.
3	Is rumble or grinding sound present?	Yes	Inspect and repair the following; Drive belt tension Loose parts in engine compartment Power steering system fluid level If normal, perform the power steering fluid line air bleed. (See AIR BLEEDING ).
3	Is rumble or grinding sound present?	No	Go to the next step.
4	Is rattle sound present?	Yes	Inspect the location of rattle for loose parts.
4	Is rattle sound present?	No	Go to the next step.
5	Is hiss sound present?	Yes	Inspect and repair the following; Vacuum leakage Spark plug looseness Intake-air system leakage
5	Is hiss sound present?	No	Go to the next step.
6	Is rap or roar sound present?	Yes	Inspect the exhaust system or loose parts.
6	Is rap or roar sound present?	No	Go to the next step.
7	Is knocking noise present?	Yes	Go to symptom troubleshooting "NO.13 KNOCKING/PINGING". (See NO. 13 KNOCKING/PINGING ).
7	Is knocking noise present?	No	If noise comes from engine internal, inspect for the friction gear, timing chain or MLA noise.
8	Inspect the intake and exhaust housing system for loose installation. Is there any problem found?	Yes	Repair installation or replace suspected part.
8		No	Go to the next step.
9	Remove the parts to necessary to inspect turbocharger without remove the turbocharger. Inspect if turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. Is there any problem?	Yes	Replace the turbocharger.
9		No	Go to the next step.
10	Inspect the turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any problem?	Yes	Replace the turbocharger.
10		No	Go to the next step.
11	Turn the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly?	Yes	Go to the next step.
11		No	Replace the turbocharger.
12	Visually inspect the turbine housing. Is there any carbon built-up or foreign material on turbine housing?	Yes	Clean built-up carbon or remove foreign materials. If turbine housing damaged, replace the turbocharger.
12		No	Install the removal parts at Step 9, and inspect all turbocharger related parts installed correctly.
13	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the repair or diagnosis. If the vehicle is repaired, troubleshooting is completed. If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.