Automatically Shifted Manual Transmission/Transaxle: Testing and Inspection

Voltage Supply of Direct Shift Gearbox Mechatronic, Checking

Special tools, testers and auxiliary items required

• multimeter.

• Wiring diagram.

Test requirements

• The Direct Shift Gearbox (DSG) Mechatronic (J743) fuses OK.

• The Power Supply Relay (terminal 15) (J329) OK.

• Battery voltage at least 12.5 volts.

• All electrical consumers such as, lights and rear window defroster, switched off.

• Selector lever in "P" or "N".

• A/C switched off.

• Ground (GND) connections between engine/transmission/chassis OK.

• Ignition switched off.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check

Start diagnosis

- Disconnect the Direct Shift Gearbox (DSG) Mechatronic (J743) electrical harness connector - 1 - by rotating counterclockwise.

Checking voltage supply, terminal 30

- Using a multimeter, check the Direct Shift Gearbox (DSG) Mechatronic (J743) electrical harness connector terminals for voltage.

- Turn key on

Specified value: battery voltage.

If the specified value was not obtained:

- Turn key off

- Check the wiring connection for an open circuit.

- Check the wiring connection for damage, corrosion, loose or broken terminals.

- If necessary, repair the faulty wiring connection.

If the wiring and voltage were OK:

- Replace Direct Shift Gearbox (DSG) Mechatronic (J743). Refer to the appropriate service manual.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Scan Tool Testing and Procedures.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Scan Tool Testing and Procedures.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Readiness Code.