Defect Code 12

Defect Code 12:

Speedometer Defective:

Possible cause: Tachogenerator, wires, speedometer

Troubleshooting:

1. Simulate instrument test with *D* speed signal. If the speed value indicated by the speedometer is not within the permissible range (for nominal values, see microfiche 'Technical Data'), renew speedometer.
2. If speedometer is OK during simulation, but defective during driving, check wires to the tachogenerator and repair if necessary.
3. If wires and speedometer are OK, replace tachogenerator,