Preliminary Testing and Diagnosis
MLP Tester InstructionsThe transmission tester allows technician to operate the electrical portion of the TR sensor. The MLP tester usage is divided into five steps:
1. Preliminary testing and diagnosis.
2. Installing the transmission tester.
3. Testing the TR sensor.
4. Testing the Park/Neutral and backup circuits.
5. Removing the transmission tester and clearing DTCs.
Preliminary Testing and Diagnosis
Before any diagnostic testing is done on a vehicle some preliminary checks must be performed, as outlined below. Be sure to write down your findings, especially any DTCs found, for future reference.
- Check ATF level and condition.
- Check for add-on items (phones, computers, CB radio etc).
- Visually inspect wiring harness and connector.
- Check for vehicle modifications.
- Verify that the shift linkage is properly adjusted in "OVERDRIVE".
- Verify that TR sensor is properly adjusted in "NEUTRAL".
^ - Verify customer concern.
- Upshift, Downshift, Coasting, Engagement, Noise/Vibration
^ - Vehicle must be at a normal operating temperature.
- Perform vehicele On-Board Diagnostic Test.
- Record all DTCs.
- Repair all non-transmission DTCs.