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Affected Terminals: -
Possible Trouble Codes.. -
Engine running at idle speed
Engine throttle valve CLOSED
(accelerator pedal in idle position)
Vehicle stationary
Vehicle with AT:
Selector lever in "P"
"N" position
Press key F8 in the system
main menu, select the desired test using the arrow keys and confirm with YES.
Follow the instructions in the
TECH 1 display.
Note:
In this mode, it is possible to
increase / lower the engine idle speed in the range from 640 to
1760 rpm using the arrow keys. In addition, the YES and NO keys can be
used to display the various data list parameters. Key F9 is used to store
the data as in the snapshot mode.
In this control mode,
TECH 1 specifies the previously adjusted idle speed to the control
unit and the control unit regulates the engine to this engine speed.
This mode should be used if it
appears necessary to evaluate the various engine parameters (e. g.
O2 INTEGRATOR or INJECTION PULSE) at increased or decreased idle
speeds.
When this test is completed, the
engine may stall. This may especially be the case if the cooling fan is
running or other consumers are switched on. The snapshot data recorded by
TECH 1 is however retained.
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