Exhaust System: Testing and Inspection

Introduction To Intake And Exhaust Diagnosis
The occurrence of exhaust leakage or abnormal noise is caused by cracks or strain in the gasket, or by when the exhaust pipe or muffler is damaged from these sections and causes the exhaust noise to increase. There may be cases when there is interference with the body and vibration noise is generated.

Intake And Exhaust Diagnostic Troubleshooting Strategy
Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find an intake or exhaust fault.
1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following the SYMPTOM CHART.
4. Verify malfunction is eliminated.





Symptom Chart

Symptom Procedures

Inspection Procedure 1

Exhaust Leakage

Diagnosis
STEP 1. Check the gasket for cracks and strain.
If damaged, replace the gasket. Then go to Step 3.
If normal, go to Step 2.

STEP 2. Check for loosening in each coupling section.
If loose, tighten. Then go to Step 3.

STEP 3. Check trouble symptoms.
Confirm that the exhaust is not leaking.

Inspection Procedure 2

Abnormal Noise Generation

Diagnosis
STEP 1. Check for missing parts in the muffler.
If missing, replace. Then go to Step 6.
If normal, go to Step 2.

STEP 2. Check the hanger for cracks.
If cracked, replace. Then go to Step 6.
If normal, go to Step 3.

STEP 3. Check for interference of the pipe and muffler with the body.
If interfering, repair. Then go to Step 6.
If normal, go to Step 4.

STEP 4. Check the heat protector for loosening and damage.
If faulty, tighten or replace. Then go to Step 6.
If normal, go to Step 5.

STEP 5. Check the pipe and muffler for damage.
If damaged, replace. Then go to Step 6.

STEP 6. Check trouble symptoms.
Check that no abnormal noise is being generated.