Transmission Position Sensor/Switch: Testing and Inspection

Diagnostic Procedures

Selector Lever Voltage Supply, Checking

Special tools, testers and auxiliary items required

• multimeter.

• Wiring diagram.

Test requirements

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





• Battery voltage at least 12.5 volts.

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

• Selector lever in "P".

• 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

- Remove the selector mechanism, far enough to gain access to the Selector Lever (E313) electrical harness connector - A -.

- Disconnect the Selector Lever (E313) electrical harness connector - A -.





Checking voltage supply, terminal 11

- Using a multimeter, check the Selector Lever (E313) electrical harness connector T 20 terminal 11 (power) to T 20 terminal 16 (ground) for voltage.

- Turn the ignition ON.

Specified value: battery voltage.

- Turn the ignition OFF.

If the specified value was Not obtained:

- Check both circuits for an open, short circuit to Ground (GND) or high resistance.

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

- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking voltage supply, terminal 18

- Using a multimeter, check the Selector Lever (E313) electrical harness connector T 20 terminal 18 (power) to terminal 16 (ground) for voltage.

- Turn the ignition ON.

Specified value: battery voltage.

- Turn the ignition OFF.

If the specified value was Not obtained:

- Check the wiring connection for an open circuit, short circuit to Ground (GND) or high resistance.

- 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 the Selector Lever (E313).

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 ] Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.