Initial Inspection and Diagnostic Overview
1 - Transmission Control Module (TCM) -J217-
- Location See below.
- Removing See below.
- Installing See below.
- Checked by On Board Diagnostic (OBD). Connecting Scan Tool VAG 1551 and Selecting Functions
2 - Engine Control Module (ECM)
- Location and removing and installing See Fig. 1
NOTE: If the engine or transmission control modules are replaced, the system must be returned to basic setting See Initiating basic setting. Basic Setting, Initiating
3 - Data Link Connector (DLC)
- Location See Fig. 2
4 - Valve body
- Location See Fig. 3
- The solenoid valves -N88-, -N89-, -N90-, -N91-, -N92-, -N93- and -N94- are attached to the valve body
- The valves are checked by On Board Diagnostic (OBD)
5 - Conductor strip with integrated Transmission Fluid Temperature Sensor -G93-
- Location See Fig. 4
- Removing and installing See Fig. 5
- -G93- is checked by On Board Diagnostic (OBD)
6 - Multi-function Transmission Range (TR) Switch -F125-
- Location and removing and installing See Fig. 6
- -F125- is checked by On Board Diagnostic (OBD)
7 - Transmission Vehicle Speed (VSS) Sensor -G38-
- Location and removing and installing See Fig. 14
- -G38- is checked by On Board Diagnostic (OBD)
8 - Vehicle Speed Sensor (VSS) -G68-
- Location and removing and installing See Fig. 15
- -G68- is checked by On Board Diagnostic (OBD)
9 - Throttle Position (TP) Sensor -G69-
- Signal of -G69- is checked by On Board Diagnostic (OBD)
- Location, further information on potentiometer and removing and installing See Fig. 8
10 - Shift Lock Solenoid -N110-
- Location, removing and installing See Fig. 11
- The solenoid is checked by On Board Diagnostic (OBD)
- Can be checked electrically. Transmission, Electrical Checking - A4 Platform (Late 1999 - on)
and via reading measured value block. Measured Value Block, Reading
11 - Transmission Range (TR) Selector Lever Display -Y5-
- Location See Fig. 7
12 - Cruise Control Switch -E45-
- Location and removing and installing See Fig. 10
- Can be checked via reading measured value block. Measured Value Block, Reading
13 - Kick Down Switch -F8-
- Location, further information on kick-down switch and removing and installing See Fig. 9
- Can be checked electrically. Transmission, Electrical Checking - A4 Platform (Late 1999 - on)
and via reading measured value block. Measured Value Block, Reading
14 - Brake Light Switch -F-
- Location and removing and installing See Fig. 12
- Can be checked electrically. Transmission, Electrical Checking - A4 Platform (Late 1999 - on)
and via reading measured value block. Measured Value Block, Reading
15 - Park/Neutral Position (PNP) Relay -J226-
- Location See Fig. 13
Fig. 1 Engine Control Module
Location: plenum area of cowl
Fig. 2 Data Link Connector (DLC)
Location: The DLC (arrow) is located behind a cover under the left side of the instrument panel.
Fig. 3 Valve body
Location: Above oil pan.
The solenoid valves -N88-, -N89-, -N90-, -N91-, -N92-, -N93- and - N94- are attached to the valve body.
Fig. 4 Conductor strip with integrated Transmission Fluid Temperature Sensor -G93-
Location: In oil pan on valve body
Fig. 5 Removing and installing conductor strip
Special tools
- 3373 Lever
The conductor strip can be replaced with the transmission installed and without removing the valve body.
NOTE: Do not kink or damage the conductor strip.
Removing and installing conductor strip
- Separate connector at transmission and remove retaining clamp.
- Drain ATF
- Remove transmission oil pan and remove wiring guide
- Pry conductor strip off solenoid valve in direction of arrow using special tool 3373.
NOTE:
- If the locating points are damaged the valve body must be replaced.
- Installation is performed in the reverse order of removal.
- Do not kink or damage the conductor strip.
Fig. 6 Multi-Function Transmission Range (TR) Switch -F125-
Location: On rear of transmission
Removing and installing -F125-
- Switch ignition off
- Disconnect connector from multi-function TR switch.
- Remove bolt and retainer.
- Remove multi-function TR switch.
- Replace seal.
Installation is performed in the reverse order.
- Tighten bolt to 10 Nm (7 ft lb).
Fig. 7 Transmission Range (TR) Selector Lever Display -Y5-
Location: TR selector lever display (arrow) is located in the instrument cluster.
Fig. 8 Throttle Position (TP) Sensor -G69-
Locations:
On a gasoline engine the TP sensor is a component part of the Throttle Valve Control Module -J338-. It can be found on the throttle valve housing (engine).
On a Diesel engine the "throttle valve signal" is generated in the Throttle Position (TP) Sensor -G79- located near the accelerator pedal.
For On Board Diagnostic (OBD):
The TP sensor is one of the engine control module sensors. However, the transmission control module also requires the TP sensor signal. Therefore, the signal from the engine control module is transmitted to the transmission control module.
On vehicles with CAN-bus, the automatic transmission control module receives the TP signal from the CAN-bus.
On vehicles without CAN-bus the signal is made available via a wire from the engine control module.
The OBD of the transmission only checks the signal, not the TP sensor. On vehicles without CAN-bus the wire for the signal is also checked.
The signal can only be read in the Measured Value Block.
See Read Measured Value Block, Display group numbers 001 and 003. Measured Value Block, Reading
NOTE: Always check the engine OBD when the transmission OBD indicates that the TP sensor is faulty
Fig. 9 Kickdown switch -F8-
Locations:
Integrated into accelerator cable and is located on the bulkhead in the engine compartment.
On vehicles which do not have an accelerator cable the kick-down signal is generated in the Throttle Position (TP) Sensor -G79- located near the accelerator pedal.
For On Board Diagnostic (OBD)
On vehicles without an accelerator cable, the kick-down switch signal is transmitted from the engine control module to the automatic transmission control module.
On vehicles with CAN-bus the automatic transmission control module receives the kick-down signal from the CAN bus.
On vehicles without CAN-bus, the signal is received via a wire from the engine control module.
Fig. 10 Cruise Control Switch -E45-
Location: On steering column switch
Fig. 11 Shift Lock Solenoid -N110-
Location: In the selector lever housing (arrow)
Fig. 12 Brake Light Switch -F-
Location: on pedal cluster.
Fig. 13 Part/Neutral Position (PNP) Relay -J226-
Location: on additional relay carrier under instrument panel, left side
Relay is marked with number "175" (arrow)
Fig. 14 Transmission Vehicle Speed Sensor -G38-
Location: on top of transmission
Removing and installing -G38-
- Switch ignition off.
- Disconnect connector from sensor.
- Remove bolt and take sensor out.
- Replace seal.
Installation is performed in the reverse order of removal.
- Tighten bolt to 10 Nm (7 ft lb).
Fig. 15 Vehicle Speed Sensor (VSS) -G68-
Location: on top of transmission
When the transmission is installed the sensor is covered by the left transmission mount.
Removing and installing VSS -G68-
Additional information
- Repair articles for Automatic Transmission 01M.
Special tools, testers and auxiliary items
- See Repair articles for Automatic Transmission 01M.
- Obtain radio code on vehicles with coded radio.
- Switch ignition off and disconnect battery ground strap.
- Remove battery.
- Remove air cleaner.
- Install support bar 10-222A with legs 10-222 A/1 (adapter 10-222 A/3 for 6-cyl. engine) and support engine/transmission in position.
- Remove bracket for power steering pressure hose.
- When transmission has been securely supported, remove bolts for transmission carrier (arrows).
- Remove pendulum support (arrows).
- Lower transmission approx. 60 mm (2.4 in.) -a-.
- Disconnect black connector from sensor.
- Remove bolt and take sensor -1- out.
- Replace seal.
Installation is performed in the reverse order of removal.
- Tighten bolt to 10 Nm (7 ft lb).
Location of Transmission Control Module (TCM) -J217-
The TCM -J217- (arrow) is located in the center/right plenum area of the cowl.
Removing TCM -J217-
- Switch ignition off.
- Remove wiper arms and plenum inner cover.
- Release multi-pin connector, then remove connector from control module.
- Remove screws (arrows).
- Remove control module.
Installing TCM -J217-
Installation is performed in the reverse order of removal.
- Locate multi-pin connector on TCM -J217- pins (arrows) then lock connector.
- Perform On Board Diagnostic (OBD). On Board Diagnostic, Performing - A4 Platform (Late 1999 - on)
- Initiating basic setting. Basic Setting, Initiating