Audi Workshop Service and Repair Manuals

Vehicle does not start Special tools and workshop equipment required

t  Protective cover -VAS 6011- Test sequence –  Interrogate fault memory → Chapter, eliminate any faults displayed and erase fault memory → Chapter. –  Try again to start the vehicle. If there are no faults in the fault memory, but the vehicle does not start: –  Wash and polish outside of bonnet with a chamois leather. –  Release the service flap from inside.

–  Release bonnet -arrows- and pull it forwards slightly.

–  Clamp the protective cover -VAS 6011- over the bonnet.

–  Remove the bonnet and lay it down on the side of the protective cover of the -VAS 6011-.   Note Do not set the bonnet down on the points. –  Apply handbrake. –  Switch on ignition.

–  Shift selector lever to position “STOP” and release the brake pedal. l  With ignition on, selector lever in “STOP” and brake pedal not pressed, the clutch must be engaged. –  Read measured value block 002 → Chapter. Display on -VAS 5051 A-: –  Check display in zone -2-. l  Specified value: Less than 3.5 V. If the specified value is exceeded, the clutch is disengaged and the electronic manual gearbox control unit -J514- is in emergency running mode. –  Perform test → Chapter „Voltage value of the clutch travel sender -G162- cannot be adjusted“. If reading matches specification:

–  By pressing the ↑ key twice, switch to measured value block 004 → Anchor. –  Check the last digit (on the far right) of the display in display zone -2-. –  Press the brake pedal. l  Specified value: Display “XXXXXXX1” = brake pedal operated. –  Release the brake pedal. l  Specified value: Display “XXXXXXX0” = brake pedal not operated.   Note Ignore the digits represented by “X”. If readout is not as described: –  Interrogate fault memory of engine control unit. –  If necessary, check brake light switch -F-/brake pedal switch -F47- → Current flow diagrams, Electrical fault finding and Fitting locations. –  Check the brake pressure switch -F270- in the electrical test, test step 9 → Anchor. If the vehicle still does not start: –  Check the system for leaks → Chapter. If the vehicle still does not start:

–  Read measured value block 004, display zone -3- → Anchor. –  Check the second to last digit (on the right) of the display in display zone -3-. –  Turn ignition key to “Start engine” position. l  Specified value: Display “XXXXXX0X” = starter inhibitor and reversing light relay -J226- is actuated. –  Release ignition key from “Start engine” position. l  Specified value: Display “XXXXXX1X” = starter inhibitor and reversing light relay -J226- is not actuated.   Note Ignore the digits represented by “X”. If readout is not as described: –  Check the starter inhibitor and reversing light relay -J226- → Current flow diagrams, Electrical fault finding and Fitting locations. –  Check the electrical connectors and the wiring → Current flow diagrams, Electrical fault finding and Fitting locations. –  Check the starter power supply of terminal 50. If the vehicle still does not start: –  Perform the final control diagnosis of the “hydraulic control unit” → Chapter. –  Perform the “gear actuator” final control diagnosis → Chapter.