Electrical and Electronic Components

1. Automatic Transmission Control Module (TCM) -J217-
- Checked via OBD.

2. Engine Control Module (ECM)
- Location: in plenum

3. Data Link Connector (DLC)
- Location: in knee bar to left of steering wheel
- Connecting VAG 1551 (or VAG 1552) Scan Tool (ST), selecting functions. Refer to "On-Board Diagnostics (OBD) With VAG 1551" at "On Board Diagnostics (OBD)". Testing and Inspection

4. Valve body
- Location: inside transmission oil pan
- Assembly includes solenoid valves -N88-, -N89-, -N90-, -N91-, -N92-, -N93-, -N94-
- Transmission fluid (ATF) temperature sensor -G93- is integrated into internal wiring harness
- Components are electrically checked via OBD

5. Multi-function Transmission Range (TR) switch -F125-
- Location: left of transmission
- Checked via OBD

6. Sensor for transmission RPM -G182-
- Location: in valve body
- Checked via OBD

7. Transmission Vehicle Speed Sensor (VSS) -G38-
- Location: right-rear of transmission
- Sensor for transmission RPM
- Checked via OBD
- Supplies transmission output speed signal

8. Selector lever mechanism
- Location: in center console

9. Shift lock solenoid -N110-
- Location: on right side of selector lever mechanism
- Can be checked in "Read Measuring Value Block" function 08 and by "Electrical Testing". Testing and Inspection

10. Throttle Position (TP) sensor -G69-
- Location: integrated into throttle valve control module -J338-
- TP sensor signal is sent via ECM to TCM.
- TP sensor signal is checked by On Board Diagnostic of ECM
- TP sensor signal can be checked in "Read Measuring Value Block" function 08
- If a TP sensor malfunction is detected using OBD program, check OBD program of ECM

11. Cruise control switch -E45-
- Location: integrated into steering column switch

12. Park/Neutral Position (PNP) relay -J226-
- Location: relay plate

13. Transmission range selector lever display -Y6-
- Location: in instrument cluster
- Transmission Range (TR) selector lever display which is completely dark indicates "mechanical backup with non-active control module" mode => TCM safety functions, refer to "General System Description". Description and Operation
- TR selector lever display which is completely lit up indicates "mechanical backup with active control module" mode TCM safety functions. Refer to "General System Description". Description and Operation

14. Kick down switch -F8-
- Location: behind spray wall in plenum, integrated into accelerator pedal cable
- Checked via OBD
- Can be checked in "Read Measuring Value Block" function 08 and by "Electrical Testing". Testing and Inspection

15. Brake light switch -F-
- Location: in pedal cluster
- Can be checked in "Read Measuring Value Block" function 08 and by "Electrical Testing". Testing and Inspection