Multi-Function Transmission Range Switch, Checking
Multi-Function Transmission Range Switch, Checking
Special tools, testers and auxiliary items required
• Multimeter
• Wiring diagram
Requirements
• Fuse (S231) OK.
• The Control Module with indicator unit in the Instrument Cluster Control Module (J285) must be OK.
• The selector lever cable adjustment OK.
• The battery voltage must be at least 12.5 Volts.
• All electrical consumers must be switched off.
• The parking brake must be engaged.
• The selector lever must be in the "P" position.
• The Ground (GND) connections to transmission must be OK.
Procedure
- Switch the ignition on.
- Depress the brake pedal and maintain depressed.
- Shift the selector lever into all positions.
The selector lever position must correspond with the Tiptronic Switch (F189) indicator display unit.
- Switch the ignition off.
If the selector lever position does not correspond with the Tiptronic Switch (F189) indicator display unit:
- Disconnect the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector - 1 -.
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- Repair any damage found to the electrical harness connector.
If the electrical harness connector is not OK:
- Repair the malfunction.
If the electrical harness connector is OK:
Checking voltage
- Switch the ignition on.
- Using a multimeter, check the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector terminal 7/B to Ground (GND) for voltage.
Specified value, Battery voltage.
- Switch the ignition off.
If the specified value was not obtained:
- Check the wiring from the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector terminal 7/B to the Ignition/starter switch for an open circuit, short to ground (GND) or a short to Battery (+).
- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking Ground (GND)
- Using a multimeter, check the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector terminal 10/31 to Ground (GND) connection for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
- If necessary, repair the faulty wiring connection.
If no malfunction was found in the wiring and the resistance was OK:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Test Box 105 Pin (VAG1598/31)
If the manufacturers test box is not being used. Perform the following step.
- Remove the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Transmission Control Module, Replacing.
- Using a multimeter, check the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector terminals to the Transmission Control Module (TCM) (J217) electrical harness connector terminals for an open circuit.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
- If necessary, repair the faulty wiring connection.
If no malfunction was found in the wiring and the resistance was not OK:
- Replace the Multi-Function Transmission Range (TR) Switch (F125). Refer to Rep. Gr 38, Multi-Function Transmission Range (TR) Switch (F125), Removing and Replacing.
If no malfunction is found in the wiring and the resistance was OK:
- Replace the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Transmission Control Module, Replacing.
Final procedures
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase DTC memory of the Transmission Control Module (TCM) (J217). => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.
3. Generate readiness code. => [ Readiness Code ] Readiness Code.