Locations of Electrical/Electronic Components

Locations of electrical/electronic components





1. Automatic transmission control module-J217
- Location see Fig. 20
- Removing see Fig. 21
- Installing see Fig. 22
- Can be checked using "guided fault finding" with the VAS 5051
2. Engine control module
- Location and removing and installing see Fig. 23
3. Data Link Connector (DLC)
- Installation location see Fig. 24
4. Conductor strip with Transmission fluid temperature sensor G93
- Location see Fig. 26
- Can be checked using "guided fault finding" with the VAS 5051
5. Valve body
- Location see Fig. 25
- With hydraulic control Type E17 or Type E 1 8/2
- Components can be checked using "guided fault finding" on VAS 5051
6. Multifunction switch - F125
- Fitting location see Fig. 28
- Removing and installing
- Can be checked using "guided fault finding" with the VAS 5051
7. Sensor for Transmission RPMG182
- Records the transmission input speed
- Fitting location see Fig. 29
- Can be checked using "guided fault finding" with the VAS 5051
8. Transmission vehicle speed sensor-G38 and Sender for transmission output RPM-G1 95
- Records the transmission output speed
- Fitting location see Fig. 27
- Can be checked using "guided fault finding" with the VAS 5051
2G9. Tiptronic switch -F189
- Location see Fig. 38
- If the switch malfunctions the symbol insert with printed circuit must be replaced
- Removing and installing
- Can be checked using "guided fault finding" with the VAS 5051
10. Shift lock solenoid - N110
- Location see Fig. 30
- Removing and installing
- Can be checked using "guided fault finding" with the VAS 5051
11. Throttle Position (TP) sensors-G69- and -G79 and Sender for accelerator pedal position -G1 85
- Further information see Fig. 37
- Can be checked using "guided fault finding" with the VAS 5051
12. Cruise control switch - E45
- Location see Fig. 31
- Can be checked using "guided fault finding" with the VAS 5051
13. Starting interlock relay - J207
- Location see Fig. 35
14. Transmission Range (TR) selector lever display -Y6
- Location see Fig. 32
- If all segments of selector lever display light up together or
- If selector lever display does not light up, transmission is in emergency running mode
15. Kickdown switch -F8
- Location for vehicles without EPC see Fig. 32
- Location for vehicles with EPC see Fig. 33
- Can be checked using "guided fault finding" with the VAS 5051
16. Brake light switch -For brake pedal switch -F47
- Location and removing and installing see Fig. 34
- Can be checked using "guided fault finding" with the VAS 5051

Fig. 20 Location of automatic transmission control module -J21 7





The control module is located in front of the right-hand seat under the carpet in footwell.

Fig. 21 Removing automatic transmission control module -J21 7





- Remove trim at bottom of A pillar and remove right hand door entry trim strip.
- Loosen carpet and fold up.
- Unclip control module from box -arrows
- Switch off ignition and then wait 30 seconds before removing multi-pin connector.
- Release multi-pin connector, then pull connector off control module.

Fig. 22 Installing automatic transmission control module -J21 7





- Place multi-pin connector on transmission control module connector housing -1-, swing in -2- and lock -3
If the engine or transmission control module is replaced, the system must be reset.
- Perform basic setting using "guided fault finding" on VAS 5051.

Fig. 23 Engine control module





Location: The control module is located in left plenum chamber.

Removing and installing control module
If the engine or transmission control module is replaced, the system must be reset.
- Perform basic setting using "guided fault finding" on VAS 5051.

Fig. 24 Diagnosis connection for vehicles from 10.00





Location: The diagnostic connection -arrow- is located under stowage compartment on driver's side.

Fig. 25 Valve body





Location: The valve body is bolted to the underside of transmission housing inside the pan.
Solenoid valves -N88-, -N89-, -N90-, -N91-, -N92-, -N93-, N94- are secured to the valve body of hydraulic control Type E17.
Solenoid valves -N91-, -N92-, -N93-, -N94- are known as pressure regulator valves 1 (-N215-), 2(-N216-), 3(-N217) and 4(-N218-) on the valve body of hydraulic control Type E18/2.

There are two different types of hydraulic control:
- Transmissions with hydraulic control Type E17, on which the sender for the transmission input seed (inductive sender) is attached to the underside of the valve body.

Removing and installing valve body
To find out which type of control is fitted
- Transmissions with hydraulic control Type E18/2 on which the sender for the transmission input speed (Hall sender) is attached to the transmission housing behind the valve body.

Removing and installing valve body
To find out which type of control is fitted

Fig. 26 Wiring harness with integral transmission fluid temperature sensor-G93





Location: The transmission fluid temperature sender arrow is located in the wiring harness on valve body.
The valve body must be removed to replace the wiring harness. It is not necessary to remove the transmission.
Removing and installing wiring harness

Fig. 27 Transmission vehicle speed sensor-G38 and Sender for transmission output RPM -G195





Location: The transmission speed sensor is located on rear right of transmission.
Removing and installing transmission speed sensor

Fig. 28 Multi-function TR switch -F125





Location: The multi-function switch -1- is located on left of transmission; Multi-pin connector for multi-function switch -2-.

Vehicles to 09.00
Multi-pin connector for 8-pin multi-function switch.

Vehicles from 10.00
Multi-pin connector for 10-pin multi-function switch.
Removing and installing multi-function switch

Fig. 29 Sensor for Transmission RPM -G182





Location: The transmission input speed sensor is located on transmissions with hydraulic control Type E17 on the underside of the valve body (see illustration). For this type of transmission, the sensor is an inductive sender.





On transmissions with hydraulic control -E18/2, the transmission input speed sensor -A- is attached to the transmission behind the valve body. For this type of transmission, the sensor is a Hall sender.
To find out which type of control is fitted
Removing and installing transmission input speed sensor

Fig. 30 Shift lock solenoid -N110





Location: The shift lock solenoid is located in the selector lever housing -arrow-.
Removing and installing shift lock solenoid

Fig. 31 Cruise control system switch -E45





Location: Cruise control switch is located on steering column switch.
Removing and installing cruise control switch

Fig. 32 Kickdown switch -F8- for vehicles without EPC





Location: Kickdown switch (arrow) is integrated into accelerator cable and is located on bulkhead in engine compartment.
Removing and installing kickdown switch
- First remove the accelerator cable. Remove and install the kickdown switch. Then reinstall cable and adjust.


Fig. 33 Kickdown switch -F8- for vehicles with EPC





Location: Kickdown switch (arrow) is integrated into accelerator pedal position sender.
Removing and installing kickdown switch
- Servicing accelerator mechanism.

Fig. 34 Brake light switch -F- or brake pedal switch -F47





Installation position: The switch is located on the pedal.
Removing and installing brake light switch or brake pedal switch

Fig. 35 Starting interlock relay-J207





Location: Relay is located on relay plate behind dash panel, left.
Relay is marked with number "204" -arrow-.
Relay positions
Removing and installing dash panel trim


Fig. 36 Transmission Range (TR) selector lever display -Y6





Vehicles to 09.00
Location: In instrument cluster

Vehicles from 10.00
Location: In instrument cluster with diagnostic interface for data bus-J533
Removing and installing selector lever display

Fig. 37 Throttle position (TP) sensors -G69- and - G79- and accelerator pedal position sender -G1 85





On vehicles with data bus, the signal comes from the bus. On these vehicles, the data bus interface is checked in addition.
If the transmission control module signals are shown as faulty in the vehicle self-diagnosis, self-diagnosis of the engine control module must also be performed at all times.
Perform initial setting of engine control module following replacement or readjustment of throttle valve potentiometer or accelerator pedal position sender.
Locations:





The potentiometer is part of the throttle valve control part -J338-. It is located on the throttle valve housing/intake manifold.
Checking and adjusting or removing and installing throttle position sensors





The throttle position sensor -G79- -arrow- is part of the electronic power control (EPC) and is located on the pedal cluster.
Checking or removing and installing throttle position sensor:


Fig. 38 Tiptronic switch -F189





Location: The Tiptronic switch is integrated in the printed circuit of the symbol insert, which can be found in the selector mechanism cover-arrow-.





It consists of 3 Hall senders -A-, -B- and -C-, which are activated by a solenoid on the masking panel of the cover strip.
A - Tip down sensor
B - Tiptronic recognition sensor
C - Tip up sensor