A8L V8-4.2L (BFM) (2004)
Catalytic Converter: Testing and Inspection
Three Way Catalytic Converters (TWC), Checking
Function
This diagnostic mode displays the test results of emission relevant components and systems which are not continuously monitored.
The values of the test results must reach the specified value or must be within the min.- and max.- limits.
Test-ID Components Test
01:
Catalytic converter monitoring
Test-ID 01: Catalytic converter
Test requirement
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Coolant temperature must be at least 80 degree C, Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.
Procedure
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Connect diagnostic tester See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting
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Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.
The following operating conditions must be met during this road test:
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Engine speed approx. 1800 to 2200 RPM, Diagnostic mode 1: Check measuring values; PID 12, engine rotations per minute (RPM)
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Vehicle speed constant 90 km/h, Diagnostic mode 1: Check measuring values; PID 13, Vehicle speed
Observe the safety precautions that apply to road tests.
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Let engine run at idle.
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Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
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Select the "Test-ID 01: Catalytic converter" off.
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Check specified values at idle.
Test-ID 01
NOTE:
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Bank 1 = Cylinder bank 1, in direction of travel, right