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Removing and installing the four-wheel drive control unit J492 > < Fault finding with the vehicle system tester V.A.G 1552 at the Haldex coupling.

Octavia Mk1

Electric/electronic components and fitting locations
Electric/electronic components and fitting locations
1 - Four-wheel drive control unit -J492-
–  Fitting location → Fig.
–  forms a single unit with the oil pressure control motor -V184 - and the hydraulic temperature sender -G271-
–  is checked by self-diagnosis as of 10.99 → Chapter
–  removing and installing → Chapter
2 - Engine control unit
–  Fitting location → Fig.
–  the following signals are transmitted to the four-wheel drive control unit via the data BUS -J492-:
–  Engine speed
–  Accelerator pedal position
–  Engine torque
–  removing and installing → relevant engine → Rep. Gr.23, or → Rep. Gr.24
3 - ABS control unit -J104-
–  Fitting location: at the hydraulic unit in left of engine compartment
–  the following signals are transmitted to the four-wheel drive control unit via the data BUS -J492-:
–  Wheel speed
–  Longitudinal acceleration
–  Brake operation
–  removing and installing → Chassis → Rep. Gr.45
4 - Diagnostic connection
–  Fitting location: in the storage compartment on the driver's side
5 - Handbrake warning switch -F9-
–  Fitting location → Fig.
–  can be checked in the measured value block, display group number 001 → Chapter and in the electrical test → Chapter
–  removing and installing → Chassis → Rep. Gr.46
6 - Brake light switch -F-
–  Fitting location: at brake pedal
–  can be checked in the measured value block, display group number 001 → Chapter and in the electrical test → Chapter
–  removing and installing → Chassis → Rep. Gr.45
7 - Pump for Haldex coupling -V181-
–  Fitting location → Fig.
–  can be checked in the actuator diagnosis → Chapter and in the electrical test → Chapter.
–  removing and installing → Chapter
  S01-0097
Four-wheel drive control unit -J492-
Fitting location: The control unit -arrow- is located on the rear final drive, in the front right area.
Removing and installing → Chapter.
  N01-0239
Pump for Haldex coupling -V181 -
Fitting location: The pump for Haldex coupling -arrow- is located on the rear final drive, in the front right area, below the control unit -J492-.
Removing and installing → Chapter.
  N01-0238
Engine control unit
Fitting position: The control unit is located in the plenum chamber.
Removing and installing control unit → relevant engine → Rep. Gr.23, or → Rep. Gr.24.
  N01-0138
Handbrake warning switch - F9-
Fitting location:Switch -arrow- is located on the hand-brake lever.
Removing and installing → Chassis → Rep. Gr.46.
  N01-0426

Removing and installing the four-wheel drive control unit J492 > < Fault finding with the vehicle system tester V.A.G 1552 at the Haldex coupling.