09LA Automatic Transmission
Electrical and Electronic Component Locations
Data Link Connector (DLC)
• Location: Diagnostic connection is located beneath knee bolster on left of steering wheel.
The following listed components can be tested in the "Guided fault finding" with the vehicle diagnostic, testing and information system (VAS 5051B).
Mechatronic
• Location: The mechatronic unit is bolted to the bottom of the transmission and is covered by the transmission oil pan.
The mechatronic unit incorporates the hydraulic control, the Transmission Control Module (TCM), the multi function Transmission Range (TR) switch and the sensors and actuators as a complete synchronized unit. Included are:
• Transmission control module (J217)
• Multi function transmission range switch (F125)
• Transmission input speed (RPM) sensor (G182)
• Transmission output speed (RPM) sensor (G195)
The "mechatronic" unit can only be replaced as a complete unit.
• All components mentioned are tested by On Board Diagnostics (OBD).
Mechatronic removing and installing. Refer to => [ Mechatronic Unit ] Service and Repair.
Transmission Wiring Harness
• Location: The wiring harness - A - with connector - C - is attached to the mechatronic unit - B -.
Transmission wiring harness removing and installing. Refer to => [ Wiring Harness ] Service and Repair.
Transmission Range (TR) Display (Y6)
• Location: Integrated in the instrument cluster.
• The Transmission Range (TR) display (Y6) can only be replaced together with instrument cluster.
Selector Lever Transmission Range (TR) Position Display (Y26)
• Location: The selector lever Transmission Range (TR) position display (Y26) - item 1 - is clipped into the center console.
Selector lever range position display removing and installing:
• Vehicles through 11.05, refer to => [ Selector Lever Range Position Display ] Selector Lever Range Position Display.
• Vehicles from 11.05, refer to => [ Selector Lever Range Position Display ] Selector Lever Range Position Display.
Kick Down Switch (F8)
• A specific value from the Throttle Position (TP) sensor (G79) and the accelerator pedal position sensor 2 (G185) are stored in the Engine Control Module (ECM).
Location: The accelerator pedal position sensors are integrated inside the accelerator pedal module - arrow -.
• If the accelerator pedal sensor is defective, replace the accelerator pedal module.
Selector Lever Sensor System Control Module (J587) with Tiptronic Switch (F189) - Vehicles through 11.05
• Location: The selector lever sensor system control module (J587) with Tiptronic switch (F189) is mounted to the shift mechanism - arrows - as a unit - 1 -.
Selector lever sensor system control module with Tiptronic switch removing and installing. Refer to => [ Selector Lever Sensor System Control Module with Tiptronic Switch ] Selector Lever Sensor System Control Module with Tiptronic Switch.
Selector Lever Sensor System Control Module (J587) with Tiptronic Switch (F189) - Vehicles from 11.05
• Location: The selector lever sensor system control module (J587) with Tiptronic switch (F189) is clipped onto the shift mechanism - arrows - as a unit - 2 -.
Selector lever sensor system control module with Tiptronic switch removing and installing. Refer to => [ Selector Lever Sensor System Control Module with Tiptronic Switch ] Selector Lever Sensor System Control Module with Tiptronic Switch.
Shift Lock Solenoid (N110) -Vehicles through 11.05
• Location: The shift lock solenoid (N110) - 1 - is clipped onto the shift mechanism.
Shift lock solenoid removing and installing. Refer to => [ Shift Lock Solenoid ] Shift Lock Solenoid.
Shift Lock Solenoid (N110) - Vehicles from 11.2005
• Location: The shift lock solenoid (N110) - 1 - is clipped onto the shift mechanism.
Shift lock solenoid removing and installing. Refer to => [ Selector Lever Lock Solenoid ] Selector Lever Lock Solenoid.
Transmission Park Selector Switch (F305) - Vehicles through 11.05
• Location: The transmission park selector switch (F305), which consists of 2 micro-switches - 1 - and - 2 - and is mounted on the right side of the selector mechanism.
Transmission park selector switch removing and installing. Refer to => [ Transmission Park Selector Switch ] Transmission Park Selector Switch.
Transmission Park Selector Switch (F305) - Vehicles from 11.05
• Installation Position: The transmission park selector switch (F305) consists of two micro-switches - 1 - and - 2 - and is installed on the plate - B - on the shift lock solenoid (N110) - A -.
The transmission park selector switch (F305) can only be replaced together with the shift lock solenoid (N110). Refer to => [ Selector Lever Lock Solenoid ] Selector Lever Lock Solenoid.