porsche Workshop Repair Guides

Porsche Workshop Service and Repair Manuals

Sensors and Switches - Fuel Delivery and Air Induction > < Transmission Position Switch/Sensor, A/T|Removal|Page 1785
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Vehicle Speed Sensor: Testing and Inspection

Diagnosis Of Vehicle Speed Sensor

Fault recognition of vehicle speed is performed during fuel cut-off.

A signal fault is detected if:

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the condition fuel cut-off is valid for the time period threshold,

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the engine speed is between two given thresholds,

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simultaneously the vehicle speed is lower than threshold and,

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engine temperature is greater than threshold.

Diagnosis of Vehicle Speed Sensor

Sensors and Switches - Fuel Delivery and Air Induction > < Transmission Position Switch/Sensor, A/T|Removal|Page 1785