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Siemens-Common Rail System – Vacuum-operated intake manifold flap position sensor

Figure depicts version of 1.8L Duratorq-TDCi (Kent) diesel in S-MAX/Galaxy 2006.5 (02/2006-)

1 Intake manifold flap vacuum unit
2 Intake manifold flap
3 Intake manifold flap position sensor

NOTE: The intake manifold flap position sensor is only installed for certain versions with intake manifold flap.

NOTE: In the 1.8L Duratorq-TDCi (Kent) diesel engine in the S-MAX/Galaxy 2006.5 (02/2006-) after replacing the intake manifold flap position sensor an initialization must be performed with the aid of WDS.

Further improvement of the EGR rate is achieved by the use of a position sensor on the intake manifold flap. In vehicles with coated diesel particulate filter the exact position of the intake manifold flap has an effect on the active regeneration process.

The position sensor is acted on by a reference voltage (5 V ± 5 %). The analogue output signal to the PCM is between 5 … 95 % of the reference voltage.

Effects of faults
Specific EGR is no longer possible.

Diagnosis
The monitoring system checks:
• the sensor for short to ground/battery (by means of a limit range check) and open control loop.
• the logical rise/fall rate of the signal, whereby intermittent faults are detected.

Emissions-related component:
• Yes (MIL-active)

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