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Conditions for Checking
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Nominal Value
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Affected Terminals: 42, 19
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Possible Trouble Codes: 33, 34
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This check can be performed in
two operating conditions: "ignition ON, engine OFF" or "engine
running at idle speed".
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The first part of the check
should be performed if the engine cannot be started; otherwise the second
part ensures accurate diagnosis.
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Check 1:
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Ignition ON
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Engine OFF
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Press F5 in the system main
menu, select desired test with arrow keys and confirm with YES. Follow
instructions in the TECH 1 display.
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The exhaust gas recirculation
valve switches alternately:
99 %
0 %
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Note:
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The exhaust gas recirculation
valve is actuated at a frequency of 0.5 Hz (actuation duration
1 s).
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The check is completed after a
maximum of 30 s.
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Noise check:
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clicking noise from exhaust gas
recirculation valve
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Check 2:
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Engine running at idle speed
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Press F5 in the system main
menu, select desired test with arrow keys and confirm with YES. Follow
instructions in the TECH 1 display.
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The TECH 1 display shows
alternately:
62 %
0 %
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Note:
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The exhaust gas recirculation
valve is actuated at a frequency of 0.5 Hz (actuation duration
2 s).
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The check is completed after a
maximum of 30 s.
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Engine speed fluctuates during
the check
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