Engine management system AHD 2.5 TDI since November 1997 (III).
Diesel fuel injection control unit, engine crankshaft speed sensor, air flow meter, intake manifold temperature sensor, electronic engine immobilizer control unit
| G28 | engine crankshaft speed sensor. |
| G70 | on the engine there is an air flow meter on the rear left, in the intake duct in the front |
| G72 | temperature sensor in the intake manifold, in the engine compartment, front left |
| J248 | diesel fuel injection control unit, near the battery |
| J362 | electronic engine immobilizer control unit, on the left behind the instrument panel |
| K117 | electronic engine immobilizer warning light |
| T3a | wiring connector, 3-pin, near the engine crankshaft speed sensor |
| T5 | wiring connector, 5-pin |
| T6b | wiring connector, 6-pin |
| T12s | wiring connector, 12-pin |
| T14 | wiring connector, 14-pin, in the lower part of the passenger compartment, front left, connector for the VAG 1551 tester |
| T22d | wiring connector, 22-pin, left under the instrument panel |
| T68 | wiring connector, 68-pin |
| (T6b) | connection to the body in the wiring kit of the diesel fuel injection system |
| (220) | connection to the body (mass sensor) included with engine wiring harness |
| (H20) | connection 1 in the diagnostic wiring kit (rotation speed signal) |
| (H21) | connection 2 in the diagnostic wiring harness |
| * | not available on vehicles with electronic engine immobilizer |
| --- | only on vehicles with electronic engine immobilizer |
| ** | absent from vehicles since May 1998 |
| -.-.- | only on vehicles since May 1998 |
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