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Home >> Volkswagen >> 2005 >> Jetta TDI, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) >> 23 Diesel Fuel Injection >> Additional signals, checking >> Automatic transmission shift change signal, checking >> Notes

Automatic transmission shift change signal, checking: Notes

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Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 receives a gear change signal from the Transmission Control Module (TCM) via the CAN-Bus wire. The engine Diesel Direct Fuel Injection Engine Control Module J248 briefly reduces the amount of fuel injected. This reduces torque and gear change jolt.

Special tools, testers and auxiliary items required 

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