Multi-Function Transmission Range (TR) Switch, checking

Requirements 

• Control Module with indicator unit in the Instrument Cluster Control Module J285 must be 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 elector lever must be in the "P" position.
• The Ground (GND) connections to transmission must be OK.

Test sequence 

• Switch the ignition on.
• Depress the brake pedal and maintain depressed.
• Shift the selector lever into all positions.

The selector lever position must correspond to the display of the Control Module with the indicator unit in the Instrument Cluster Control Module J285.

• Switch the ignition off.

If the selector lever position does not correspond to the display of the Control Module with indicator unit in the Instrument Cluster Control Module J285 :

• Disconnect the electrical connector in the - direction of the arrow  - and remove it from the Transmission Control Module (TCM) J217.
• Observe safety precautions.
• Check the electrical harness connector for contact corrosion and ingress of water.

If the electrical harness connector is not OK:

• Repair the malfunction and repeat the test sequence.

If the electrical harness connector is OK:

• Check the wiring according to the wiring diagram:

If no malfunctions are found in the wiring:

• Replace the Mechatronic unit in the transmission: → 38 GEARS, CONTROL .

Final procedures 

1. Check the DTC memory.
2. If necessary, erase the DTC memory of the Transmission Control Module (TCM) J217. Refer to Diagnostic Mode 04: Reset/delete diagnostic data .
3. If the DTC memory was erased, generate readiness code. Refer to Readiness Code Description .