porsche Workshop Repair Guides

Porsche Workshop Service and Repair Manuals

Catalytic Converter > < Engine Controls - Secondary Air Short Test Information|Page 2057
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Monitoring conditions for active check:

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engine coolant temperature in between calibrated thresholds,

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Intake air temperature in between calibrated thresholds,

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modeled catalyst temperature < calibration

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altitude correction for fuel injection > calibration,

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lambda control ready for operation,

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no exclusion due to request of other functions:
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e.g. no monitoring of mixture system, canister purge valve,

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e.g. no activity of mixture system and canister purge valve

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e.g. no faults of engine coolant temperature sensor, mass air flow sensor,

intake air temperature sensor, SAI power stage, leak detection system, canister purge valve power stage, oxygen sensor(s) pre-catalyst, misfire,
battery voltage.

Diagnosis of Secondary Air System - Active SAI Monitor

Catalytic Converter > < Engine Controls - Secondary Air Short Test Information|Page 2057