Multi-Function Transmission Range (TR) Switch, checking: Notes

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

Test requirements 

• Respective fuses must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Control module with indicator unit in Instrument cluster control module -J285- must be OK.
• Battery voltage must be at least 11.5 volts.
• 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 or else daylight driving lights will be switched on.
• Ignition switched off.

Function test 

• Switch ignition on.
• Depress brake pedal and maintain depressing.
• 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 match with display:

• Disconnect 10-pin harness connector -2- to Multi-Function Transmission Range (TR) Switch -F125- (-1-).

Observe safety precautions. Refer to 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). Refer to Diagnostic mode 4: Reset/erase diagnostic data 
• Generate readiness code. Refer to Readiness code, generating 

If harness connector is OK:

• Check wires to Transmission Control Module (TCM) according to wiring diagram. Refer to Checking Wires To Transmission Control Module (TCM)  .