Preliminary Testing and Diagnosis

Transmission Tester Instruction

The transmission tester allows a technician to operate the electrical portion of the transaxle independent of the vehicle electronics. The transmission tester usage is divided into five steps:

1. Preliminary testing and diagnosis.
2. Installing the transmission tester.
3. Static testing-vehicle OFF.
4. Dynamic testing-vehicle running.
5. Removing the transmission tester and clearing Diagnostic Trouble Codes (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 DTC, for future reference.

- Check ATF level and condition.

- Check for add-on items (phones, computers, CB radio etc).

- Visually inspect wiring harness and connectors.

- Check for vehicle modifications.

- Verify that the shift linkage is properly adjusted.

- Verify customer concern.

- Upshift, Downshift, Coasting, Engagement, Noise/Vibration.

- Vehicle must be at a normal operating temperature.

- Perform vehicle On-Board Diagnostic Test.

- Record all DTCs.

- Repair all non-transaxle DTCs.