Engine management system AHD 2.5 TDI since February 1999 (VI).
Diesel fuel injection control unit, fuel shut-off valve, glow plug relay, glow plugs
| H1 | signal |
| J52 | glow plug relay, near the battery |
| J248 | diesel fuel injection control unit, near the battery |
| J404 | unloader relay for terminal 15, under the driver's seat |
| N109 | fuel shut-off valve |
| N246 | ventilation valve for regulating the purge of the cooling system |
| Q6 | glow plugs |
| S39 | glow plug fuse, to glow plug relay |
| T2a | wiring connector, 2-pin, near the expansion tank |
| T6 | wiring connector, 6-pin |
| T10 | wiring connector, 10-pin, left side of engine |
| T68 | wiring connector, 68-pin |
| (11) | connection to "ground" |
| (28) | connection to "ground" |
| (A20) | connection (15a) in the instrument panel wiring kit |
(The original information is posted on the website www.VWmanual.ru)
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