Haldex-Clutch (Generation Haldex II), Rear Final Drive 02D/0AV, Checking Functions

Haldex-Clutch (Generation Haldex II), Rear Final Drive 02D/0AV, Checking Functions

• The ID - arrow - on the bottom side of the final drive identifies which final drive is installed.

Example of the ID on a Final Drive "02D"






=> [ Final Drive 02D and 0AV, Function Test for Opened Haldex Clutch, Manual Transmission ]

=> [ Final Drive 02D and 0AV, Function Test for Closed Haldex Clutch, Manual Transmission ]

=> [ Final Drive 02D and 0AV, Function Test for Opened Haldex Clutch, S-Tronic Transmission ]

=> [ Final Drive 02D and 0AV, Function Test for Closed Haldex Clutch, S-Tronic Transmission ]

Before servicing the Haldex clutch, determine the cause of the damage as exact as possible using the vehicle diagnosis, testing and information system in "Guided Fault Finding", "OBD" and "Test Instruments".

Refer to => [ , Connecting and Checking ] Testing and Inspection

Final Drive 02D and 0AV, Function Test for Opened Haldex Clutch, Manual Transmission

Test Prerequisites

• Haldex clutch fluid level OK

• Check fluid level in Haldex clutch, refer to => [ Oil Level in the Haldex Clutch, Checking ] Haldex Clutch Oil Level, Checking or Filling.

• Correct Engine Control Module (ECM) and ABS control module installed (check coding and control module identification number).

- Place vehicle on lift.

For safety reasons, vehicle must be placed on lift so that the wheels do not have any contact with floor.

Be careful when testing to prevent damage.

- Press clutch pedal.

- Start the engine.

- Press clutch pedal, engage 1st gear and accelerate slowly.

All 4 wheels must turn.

- Set the parking brake.

Rear wheels must come to a standstill while front wheels continue to turn.

• Do not turn rear wheels:

Haldex clutch is open, function is OK.

• Turn the rear wheels:

The Haldex clutch is closed. Possible cause of malfunction:

• Main pressure control valve can stick

• Mechanical Haldex clutch malfunction

• All Wheel Drive (AWD) control module (J492) at rear final drive faulty

• Parking brake indicator lamp switch (F9) faulty

Final Drive 02D and 0AV, Function Test for Closed Haldex Clutch, Manual Transmission

Test Prerequisites

• Haldex clutch fluid level OK

• Check fluid level in Haldex clutch, refer to => [ Oil Level in the Haldex Clutch, Checking ] Haldex Clutch Oil Level, Checking or Filling.

• Correct Engine Control Module (ECM) and ABS control module installed (check coding and control module identification number).

- Place vehicle on lift.

For safety reasons, vehicle must be placed on lift so that wheels do not have any contact with floor.

Be careful when testing to prevent damage.

- Press clutch pedal.

- Start the engine.

- Depress the clutch pedal and shift into 2nd gear.

- Engage parking brake and allow clutch pedal to slowly return.

Engine Must Run Out.

• If engine runs out:

Haldex clutch is closed, function is OK.

• If engine does not run out:

Haldex clutch is open. Possible cause of malfunction:

• Main pressure regulating valve may be sticking

• Mechanical Haldex clutch malfunction

• All Wheel Drive (AWD) Control Module (J492) at rear final drive faulty

Final Drive 02D and 0AV, Function Test for Opened Haldex Clutch, S-Tronic Transmission

Test Prerequisites

• Haldex clutch fluid level OK

• Check fluid level in Haldex clutch, refer to => [ Oil Level in the Haldex Clutch, Checking ] Haldex Clutch Oil Level, Checking or Filling.

• Correct Engine Control Module (ECM) and ABS control module installed (check coding and control module identification number).

- Place vehicle on lift.

For safety reasons, vehicle must be placed on lift so that wheels do not have any contact with floor.

Be careful when testing to prevent damage.

- Start the engine.

- Engage D gear and depress gas pedal slightly.

All 4 Wheels Must Turn.

- Set the parking brake.

Rear Wheels Must Come to a Standstill While Front Wheels Continue to Turn.

• Do not turn rear wheels:

Haldex clutch is open, function is OK.

• Turn the rear wheels:

The Haldex clutch is closed. Possible cause of malfunction:

• Main pressure regulating valve may be sticking

• Mechanical Haldex clutch malfunction

• All Wheel Drive (AWD) control module (J492) at rear final drive faulty

• Parking brake indicator lamp switch (F9) faulty

Final Drive 02D and 0AV, Function Test for Closed Haldex Clutch, S-Tronic Transmission

Test Prerequisites

• Haldex clutch fluid level OK

• Check fluid level in Haldex clutch, refer to => [ Oil Level in the Haldex Clutch, Checking ] Haldex Clutch Oil Level, Checking or Filling.

• Correct Engine Control Module (ECM) and ABS control module installed (check coding and control module identification number).

- Place vehicle on lift.

For safety reasons, vehicle must be placed on lift so that wheels do not have any contact with floor.

Be careful when testing to prevent damage.

- Start the engine.

- Engage D gear and move from brake pedal.

All 4 wheels must turn.

- Set the parking brake.

- Press accelerator slightly.

A noticeable acceleration against parking brake must be felt or seen.

• If acceleration is detected:

Haldex clutch is closed, function is OK.

• If acceleration is not detected:

Haldex clutch is open. Possible cause of malfunction:

• Main pressure regulating valve may be sticking

• Mechanical Haldex clutch malfunction

• All Wheel Drive (AWD) control module (J492) at rear final drive faulty