A5 Quattro Coupe V6-3.2L (CALA) (2009)
Catalytic Converter: Testing and Inspection
Diagnostic Procedures
Catalytic Converter, Checking
Observe all safety precautions: => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions
View clean working conditions: => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean Working
Conditions
Prior to repair work, perform a preliminary check to verify the condition. Refer to => [ Preliminary Check ] See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
Special tools, testers and auxiliary items required
‹› Generic scan tool
Test requirements
‹› Battery voltage at least 12.5 volts.
‹› Oxygen Sensors OK.
‹› No leaks or damage to exhaust system.
Function test
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Perform the function test in Diagnostic Mode 06. Refer to => [ Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions ] See:
Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 01 - 09/Diagnostic Mode 06 - Read
Test Results for Specific Diagnostic Functions.
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End diagnosis and switch the ignition off.
If the specified values are exceeded:
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Check the exhaust system for leaks.
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If necessary, repair the leak in the exhaust system.
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Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 01 - 09/Diagnostic Mode 04 - Erase DTC Memory.
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Perform a road test to verify Repair.
If the DTC does not return:
Generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes/Readiness Code.
If no leaks are found in the exhaust system:
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Replace the catalytic converter with front exhaust pipe. Refer to the appropriate service information.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 01 - 09/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 01 - 09/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and