Audi Workshop Service and Repair Manuals

Special tools,
testers and equipment required

• ◆ V.A.G 1526 A
• ◆ V.A.G 1594 A
• ◆ V.A.G 1598 A
• ◆ V.A.G 1598/11

Notes:

• ◆ This signal is used as a load signal by the gearbox control unit.
• ◆ The wiring and load signal are monitored by gearbox control unit:

=> Automatic gearbox 01V Self-diagnosis; Repair Group 01; Interrogating fault memory

• ◆ The following check is only to be performed if a fault relating to the load signal has been stored in the fault memory of the gearbox control unit.

• ‒ → With the ignition switched off, use adapter V.A.G 1598/11 to connect test box V.A.G 1598 A to connector B and additionally to the engine control unit .
• ‒ Connect voltage tester V.A.G 1527 B as follows:

• ‒ Switch the ignition on.
• ‒ The LED must light dimly and become brighter on pressing the accelerator pedal.

If the LED does not light up and does not become brighter:

• ‒ Check throttle valve potentiometer
  .
• ‒ If the throttle valve potentiometer is OK, fit a new engine control unit => Page 24-20.

If the LED lights up and becomes brighter:

• ‒ Pull connector off automatic gearbox control unit.
• ‒ Check for open circuit and short to positive or earth in the following wiring connections:

• ‒ If wiring is OK, establish defect in automatic gearbox control unit.