Audi Workshop Service and Repair Manuals

Notes:

• ◆ The menu item >wiring is deactivated if any vehicle parameters are missing.
• ◆ Any faults recognised in the wiring test are listed. The faults recognised lead to the deactivation of the next commissioning step, > test drive.
• ◆ After taking appropriate measures (e.g. testing according to current flow diagram), the wiring test must be repeated until it can be terminated without any faults.

If the vehicle values are available, the electrical connections to the following components are tested in the wiring test:

• ◆ GPS aerial
• ◆ Magnetic field probe
• ◆ Shunt resistor or voltage tap
• ◆ ABS control unit
• ◆ Reversing light signal

The wiring test must be performed when commissioning and in the event of customer complaints.

• ‒ Invoking customer service software .
• ‒ → Select the menu item "WIRING" with the cursor keys.

Display:

• ‒ A test of the electrical connections is started with the "ENTER" key in service.

Display:

• ‒ If the selection is confirmed with the "ENTER" key, the program continues with the relevant menu item.
• ‒ If the selection is not confirmed with the "ENTER" key, the following instruction appears:

Display:

• ‒ Confirm the display OK with the "ENTER" key.

Display:

The GPS aerial and compass pickups are tested and checked whilst the "PLEASE WAIT" screen is displayed.

The following display appears if a fault is found in the GPS aerial:

• ‒ Press "ENTER" key to continue.
• ‒ Check the fault in the wiring/from incorrect location selection and if necessary repair, either immediately or at the end of the wiring test when all faults are displayed once again
  .

The following display appears if a fault occurs in the compass:

• ‒ Press "ENTER" key to continue.
• ‒ Immediately check he fault in the wiring/from incorrect location selection and if necessary repair, either immediately or at the end of the wiring test when all faults are displayed once again .

Next display:

• ‒ Switch on rear window heating and confirm with the "ENTER" key.

Display:

• ‒ Switch off rear window heating and confirm with the "ENTER" key.

However, if the following display appears, a fault has been detected in the shunt resistor or voltage tap:

Switch for heated rear window has not been actuated or

• ‒ wiring to rear window heating is not OK.
• ‒ Press "ENTER" key to continue.
• ‒ Check the fault in the wiring/on the connectors and if necessary repair, either immediately or at the end of the wiring test when all faults are displayed once again
  .

Notes:

• ◆ A shunt resistor has been installed in the A4 Saloon.
• ◆ A voltage tap has been installed at the rear window of the A4 Avant, i.e. the battery voltage is measured.

Display:

• ‒ Press "ENTER" key to continue.

Display:

• ‒ Confirm the display OK with the "ENTER" key.

Display:

• ‒ Start the engine and drive forwards straight ahead. Compare the displays of both L and R wheel sensors.
• ‒ Stop the vehicle.
• ‒ If the values are within the permissible lower speed range (the difference must not be more than 5 km/h), use the "ENTER" key to confirm the display > YES, otherwise select > NO.
• ‒ Check the fault in the wiring/wheel calibration and if necessary repair, either immediately or at the end of the wiring test when all faults are displayed once again .

Display:

• ‒ Engage reverse gear.
• ‒ Reverse the vehicle approx. 3 m and stop.
• ‒ Confirm the display OK with the "ENTER" key.
• ‒ Check the fault in the wiring/wheel calibration and if necessary repair, either immediately or at the end of the wiring test when all faults are displayed once again.
  .

If no faults are detected in the wiring test, the following display appears:

Display:

• ‒ Confirm the display with the "ENTER" key to jump to the main menu. The next commissioning step DRIVE TST is then activated.

Display:

• ‒ Press "ENTER" key to start the TEST DRIVE
  .

Several faults can be recognised in the wiring test in extreme cases.

Notes:

• ◆ Fault determination is based on the assessment of signals from the corresponding sensors. A defective sensor can also be the cause of the error in addition to a wiring error.
  This options should only be taken into consideration after ensuring that the wiring is correctly installed (see current flow plan).
• ◆ Fault areas can also be checked individually via the SYS. TEST menu, before e.g. the complete wiring test is performed after repair measures by clearing the menu item DRIVE TST.

Possible display:

Note:

REAR VOLT. may also be displayed for SHUNT

• ‒ Rectify any faults by taking appropriate measures.
• ‒ Confirm the display with the "ENTER" key to jump to the main menu.

Display:

• ‒ Select the menu item "WIRING" once again with the cursor keys.
• ‒ Confirm the display with the "ENTER" key to repeat the electrical connections test in service.