Ford Focus Owners Manual: Wheels and tyres

Battery connection points

CAUTION: Do not connect to the negative (–) terminal of the flat battery. ...

General information

CAUTIONS: Use only approved wheel and tyre sizes. Using other sizes could damage the vehicle and will make the National Type Approval invalid. If you change the diameter of the tyres from th ...

More about Ford Focus:

Ford Focus Diagnostic Parameters Identification (PID) Chart
Using Output State Control and Accessing PIDs To confirm that the output state control value was sent by the scan tool and the PCM has accepted the output state control substitution, a corresponding PID or PIDs for each output state control parameter should be monitored. Additional PIDs shou ...