1. New brake pads need to be fitted to a hub assembly with an electric hand brake, how should the caliper pistons be retracted:
Using the scan tool settings and instructions Remove the caliper and put it in a vice With a lever bar Using a wind-back tool for a similar (non electric handbrake) hub assembly
2. A Delphi common rail injector has been replace, what should be done next:
Road test the car Re-code the injector into the control unit using the scan tool Post back the exchange unit Check the anti-freeze content
3. A battery has been replaced without using a power saver on many cars the following will need to be re-set with a 'scan tool':
Time and date Steering angle sensor position Radio code Service intervals
4. A fault has occurred with a diesel particulate filter what live data may be worth reviewing on the scan tool:
Miles since last regeneration Pre and post DPF pressure sensors Percentage of soot content All of the above
5. A electric window will not operate, the technician suspects the switch is faulty, how could a scan tool be used to assist in the diagnostic process:
Use the actuator function to lower and raise the window eliminating the motor and wiring from the module Re-flash the control module's software version Scan the engine control module for DTCs Check to see how many times the window has been operated since manufacturer
6. The scan tool will usually disable live data on vehicle speed sensors at 30mph, why is this:
That is as high as they operate For safety reasons so the technician is not driving and reviewing information on a scan tool All four sensors must be faulty Technicians are only insure to drive up to 30mph
7. A scan tool will not communicate with the ABS / ESP module, the technician thinks the module is faulty but what should be checked first:
The module has the correct power supplies and earth connections Other modules on the network will communicate with the scan tool Ensure the correct 'variant' of vehicle has been selected on the scan tool set up All of the above
8. An SRS diagnostic trouble code (DTC) is logged for the passenger's seat occupancy sensor, which of these could cause this fault:
The vehicle has been valeted and a vacuum cleaner dislodged the sensor's multi-plug The seat runner is seized The seat belt pretensioner is faulty The airbag has been turned off as a child's seat was fitted
9. When performing a forced regeneration of the diesel particulate filter what precautions should be adhered too:
There is adequate fuel in the tank The area is clean and there is no debris The area around the tailpipe is not occupied All of the above
10. An electronic throttle body has been removed and the battery disconnect during a head gasket replacement, what task may be necessary:
Adapt the throttle body valve position back to the engine control unit using the scan tool Clean the throttle body with carburetor cleaner Lubricate the linkage Adjust the cable 'free play'
