Multi-Function Transmission Range (TR) Switch, Checking

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 + socket47
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. 1.5 ohms

- Also check wires for short circuit to each other.
Specified value: Infinity ohm

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).
- Generate 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).
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes