Test Driving

Test driving

Warning: Problems with the brakes may make the car hard to control. Always test drive cars under safe, controlled conditions. Follow the appropriate traffic and speed regulations.

^ The ignition must be switched off so that the control module can connect the ABS system.





^ Start engine and watch for brake failure warning lamp. If this comes on, do not drive car. Check brake fluid level. If the brake fluid level is too low the hydraulic braking system should be checked for leaks. If brake fluid level is OK, perform fault-tracing according to fault symptom "Brake circuit out of function, warning lamp lit".
^ Drive at a speed of at least 50 km/h (31 mph). If the ABS warning lamp lights or does not go out, read off any diagnostic trouble codes (DTCs) that have been stored and perform fault-tracing accordingly. If no diagnostic trouble code DTC)s are stored but light comes on, carry out fault-tracing according to the fault symptoms.





^ Brake several times to stop from a suitable speed on an even, dry road. At least one braking should activate ABS control from a speed of above 50 km/h (31 mph). Make a note of any unusual noise or abnormal behavior. Listen particularly for clicks or bangs, see if the car pulls to one side or if the brake pedal does not seem to be working normally. Fault-trace according to the relevant symptom.








If ABS (Anti-spin/TRACS) warning indicator comes on return to the workshop and read off any diagnostic trouble codes (DTCs) which have been stored. Make a note of the driving conditions under which the warning lamp(s) came on. Carry out fault-tracing according to the DTC that is stored.