ML 430 (163.172) V8-4.3L (113.942) (2000)
Control Module HVAC: Description and Operation
CDI Control Module Task/Function
CDI control module task
Controlling the following systems in line with the analysis of input signals:
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Fuel supply system
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Injected quantity control
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Emission control system
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Charge pressure control
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Cruise control (only AT)
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AC compressor shutoff
Monitoring inputs/outputs, checking plausibility and storing faults
Formation of substitute values in the event of signal failure (emergency running)
Diagnosis (output of stored faults)
CDI control module function
The CDI control module (N3/9) is supplied with voltage by the fuse and relay module (N10/1 in model 203, K40/4 in model 210, K40/7 in model
220, F1 in model 163).
It detects the input signals and actuates the outputs in line with the operating conditions