On-Board Computer

Notes

- Troubleshooting with BMW diagnostic system.

- Battery charge Umin = 12 Volt.

- Removal and installation of on-board computer only with ignition switched off.

- Only perform troubleshooting in accordance with pin assignments and schematic.

Defect Code Table

*D* Defect code Defects stored by control unit

Defect 1: Central indicator lamp
Defect Code 1

Defect 2: Gong T2
Defect Code 2

Defect 3: Gong T1
Defect Code 3

Defect 4: Code output
Defect Code 4

Defect 5: Antitheft horn
Defect Code 5

Defect 6: Timer
Defect Code 6

Defect 7: Temperature input
Defect Code 7

Defect 8: Data link CLC
Defect Code 8

Defect 9: Control line LAC
Defect Code 9

Defect 10: Data link DATA
Defect Code 10

Defect 11: Terminal "R"
Defect Code 11

Defect 12: Terminal "15"
Defect Code 12

Defect 13: Front lid/radio contact
Defect Code 13

Defect 14: Speed-A signal
Defect Code 14

Defect 15: Injection signal
Defect Code 15

Defect 16: Tank input
Defect Code 16

Defect 17: Diagnostic link TxD
Defect Code 17

Defect 18: Steering column switch
Defect Code 18

Defect 19: Dimmer signal
Defect Code 19

Defect 20: Brake light test switch
Defect Code 20

Malfunctions - Defects not stored by control unit

Defect 30: On-board computer failure.
Defect Code 30

Defect 31: BC horn triggers alarm for no apparent reason.
Defect Code 31

Defect 32: Code LED flashes with code function armed.
Defect Code 32

Defect 33: Emergency disarm of code function.
Defect Code 33