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Multi-Function Transmission Range Switch, Checking






Diagnostic Procedures

Multi-Function Transmission Range Switch, Checking

Special tools, testers and auxiliary items required

Multimeter (VAG1526) or Multimeter (VAG1715)

Connector test kit (VAG1594)

Wiring diagram

Test Prerequisites

Respective fuses in fuse box (instrument panel, right) must be OK:

Control Module with indicator unit in instrument panel insert (J285) must be OK.

Battery voltage must be at least 11.5 volts.

All electrical consumers such as, for example, lights and rear window defroster must be switched off.

Parking brake must be engaged or else daylight driving lights will be switched on.

Selector lever must be in P position.

Ground (GND) connections to transmission must be OK.

Function Test

- Switch ignition on.

- Depress brake pedal and maintain depressed.

- Shift into all selector lever positions.

Selector lever position must correspond to display of Control Module with indicator unit in instrument panel insert (J285).

- Switch ignition off.

If selector lever position does not correspond to display of Control Module with indicator unit in instrument panel insert (J285)

- Check wires according to wiring diagram.

Wiring, Checking

- Connect test box to control module wiring harness , connect test box for wiring test.

- Disconnect 10-pin harness connector - arrow 1 - to Multi-Function Transmission Range (TR) Switch (F125).





- Check wires between test box and 10-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.





Terminal 1+socket 47

Terminal 3 + socket 1

Terminal 4 + socket 2

Terminal 5 + socket 22

Terminal 7 + socket 10

Terminal 9 + socket 36

Terminal 10 + socket 21

Wire resistance: max. 1.5ohms

- Also check wires for short circuit to each other.

Specified value: infinite ohms

If no malfunctions are found in wires:

- Check adjustment of Multi-Function Transmission Range (TR) Switch (F125) , Multi-Function Transmission Range (TR) Switch, removing and installing, adjusting.

- Check adjustment of selector lever cable:

- Erase DTC memory of Transmission Control Module (TCM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

If no malfunctions are detected in wires and adjustments of selector lever cable and Multi-Function Transmission Range (TR) Switch are OK:

- Replace Multi-Function Transmission Range (TR) Switch (F125) , Multi-Function Transmission Range (TR) Switch, removing and installing, adjusting.

- Erase DTC memory of Transmission Control Module (TCM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.