Transmission Control Systems: Locations

Electrical and Electronic Components and Component Locations

Data Link Connector (DLC)





• Installed location: The DLC for the vehicle diagnosis tester is inside the footwell on the driver side.

• Determine the cause of the malfunction as accurately as possible using Guided Fault Finding, OBD and Test Instruments before starting any repairs on the transmission vehicle diagnosis tester.

Transmission Control Module (J217)





• Installed location: The transmission control module is at the back of the transmission, secured directly to the hydraulic control module.

The following parts are integrated in the Transmission Control Module (TCM) and can only be replaced together with the TCM:

1. Connector to the hydraulic control unit, on solenoid valve 1 (N88)

2. Connector to the hydraulic control module, on the automatic transmission pressure regulating valve 2 (N216)

3. Connector to the hydraulic control module, on the automatic transmission pressure regulating valve 1 (N215)

4. Transmission input speed sensor (G182) and transmission input speed sensor 2 (G612)

5. Automatic transmission hydraulic pressure sensor 1 (G193)

6. Multifunction transmission range switch (F125) (also called the drive gear sensor)

7. Automatic transmission hydraulic pressure sensor 2 (G194)

8. Transmission output speed sensor (G195)


• On Board Diagnostic (OBD) monitors the transmission control module.

Hydraulic Control Unit





• Installed location: The hydraulic control unit is attached to the back of the transmission. The transmission control module is attached directly to the hydraulic control module.

A Solenoid valve 1 (N88) electrical connector
B Automatic transmission pressure regulating valve 2 (N216) electrical connector
C Automatic transmission pressure regulating Valve 1 (N215) electrical connector

• The OBD monitors the valves.

Selector Lever Sensor System Control Module (J587) and Tiptronic Switch (F189)





• Installed location: The selector lever sensor system control module and the tiptronic switch are a single unit - 2 -, which is clipped to the selector mechanism function unit - arrows -.

Refer to => [ Selector Lever Sensor System Control Module ] 0AW Transmission.

Shift Lock Solenoid (N110)





• Installed location: The shift lock solenoid - 1 - is clipped to the selector mechanism.

Refer to => [ Shift Lock Solenoid (N110) ] Service and Repair.

Transmission Park Selector Switch (F305)





• Installed location: The transmission park selector switch, which consists of two reed contacts - 1 and 2 -, is installed on the circuit board - B - on the shift lock solenoid - A -.

• The transmission park selector switch can only be replaced together with the shift lock solenoid.

Transmission Range Display (Y6)





• Installed location: The transmission range display - arrow - is integrated inside the instrument cluster.

• Replace the instrument cluster if one of the transmission range displays is faulty.

Selector Lever Transmission Range Position Display Unit (Y26)





• Installed location: The selector lever transmission range position display unit - 1 - is clipped inside the multimedia system control head (E380).

Refer to => [ Selector Lever Transmission Range Position Display Unit ] Service and Repair.

Kick Down Switch (F8)





A programmed value from the accelerator pedal position sensor (G79) and accelerator pedal position sensor 2 (G185) (integrated in accelerator pedal module) are saved in the Engine Control Module (ECM) as a kick-down signal.

• Installed location: The accelerator pedal position sensors are integrated inside the accelerator pedal module - arrow -.

• If the accelerator pedal sensor is faulty, then replace the accelerator pedal module.

Transmission Fluid Cooling Valve (N509)





• Installed location: The transmission fluid cooling valve - A - is mounted on the left side of the transmission.

1. Connector