Multi-Function Transmission Range (TR) Switch, Checking

Multi-Function Transmission Range (TR) Switch, Checking

Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram

Requirements
- Respective fuses must be OK.
- Instrument cluster control module -J285- must be OK.
- Selector lever must be in -P- position.
- Ground (GND) connections to transmission must be OK.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- Parking brake must be engaged.
- Ignition switched off.

Function test
- Switch ignition on.
- Depress brake pedal and maintain depressed.
- Shift into all selector lever positions.

NOTE: Selector lever position must correspond to display of Instrument cluster control module -J285-.

- Switch ignition off.

If selector lever position does not correspond to display of Instrument cluster control module -J285-:







- Disconnect connector from Multi-Function Transmission Range (TR) switch -F125-.
Observe safety precautions.
- Check harness connector for contact corrosion and ingress of water.

If harness connector is not OK:
- Repair malfunction and repeat test sequence.
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes.

If harness connector is OK:
- Check wires to Transmission Control Module (TCM) according to wiring diagram.

Checking wires to Transmission Control Module (TCM)
- Connect test box to Transmission Control Module (TCM) wiring harness, connect test box for wiring test.







- Check wires between test box and 8-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.

Terminal 1 + socket 63
Terminal 2 + socket 40
Terminal 3 + socket 1
Terminal 5 + socket 18
Terminal 6 + socket 62
Terminal 7 + socket 23

Wire resistance: max. 1.5 Ohms

- Check wires for short circuit to each other.
Specified value: Infinite Ohms

If no malfunctions are found in wires:
- Check adjustment of selector lever cable:
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes.

If no malfunctions are detected in the wires and the selector lever cable adjustment is OK:
- Replace Multi-Function Transmission Range (TR) switch -F125-.
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes.