-
‒ Note Lambda probe voltage in display zone 3. The voltage must
fluctuate at least 30 times per minute in range of 0... 1.0 V.
-
‒ Press ⇒key.
-
‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
If the Lambda regulation does not fluctuate as stated:
-
‒ Carry out road test and burn Lambda probes clean and repeat check.
If the specifications are not obtained again:
-
‒ Check Lambda probe heating => Page 24-22.
-
‒ Evaluate the measured value blocks 7 to 9
=> Page 01-77, Evaluating measured value blocks, display groups 0...13.
If the voltage change is slower, determine cause of fault. => Page 24-90.
If the displayed figure remains constant:
-
‒ Continue check according to following table.
|
---|
Display
|
Cause
|
Continuation of check
|
Between 0.400... 0.500 V
|
Open circuit
|
=> Page 24-92 checking Lambda probe wiring
|
1.105 V
|
Short to positive
|
|
0.000 V
|
Short to earth
|
|
Possible causes of fault if probe control frequency is too slow:
-
◆ The slots or holes in probe body are blocked
-
◆ The probe vent hole in area of connecting wire is blocked
-
◆ The probe has been overheated (glazed)
-
◆ The probe has been damaged by leaded fuel
Checking basic voltage
|