| J... | Engine control units |
| J234 | Airbag control unit |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface control unit |
| SB10 | Fuse -10- in relay plate fuse box |
| T10s | 10-pin connector, grey, connector point under relay carrier |
| T10x | 10-pin connector, yellow, connector point right A pillar |
| T16 | 16-pin connector, self-diagnosis connection |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| T75 | 75-pin connector, on airbag control unit |
| 76 | Earth point, near selector mechanism |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 501 | Screw connection -2- (30), on relay plate |
| A40 | Positive (+) connection -1- (30), in instruments wiring harness |
| A52 | Positive (+) connection -2- (30), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Does not engine codes ANY |
| G85 | Steering angle sender |
| J104 | ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J361 | Simos control unit (injection system) |
| J362 | Immobilizer control unit |
| J514 | Electronic manual gearbox control unit |
| J537 | 4LV control unit (injection system) |
| T10s | 10-pin connector, grey, connector point under relay carrier |
| T25 | 25-pin connector, on ABS with EDL control unit |
| T45a | 45-pin connector, on automatic gearbox control unit |
| T47 | 47-pin connector, on ABS with EDL control unit |
| T68 | 68-pin connector, on electronic manual gearbox control unit |
| T80 | 80-pin connector, on Motronic control unit |
| T121 | 68-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
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