Description of On-Board Diagnostics

Transmission Vehicle Harness Connector, Part 1 Of 3:

Transmission Vehicle Harness Connector, Part 2 Of 3:

Transmission Vehicle Harness Connector, Part 3 Of 3:

Digital Transmission Ragne (TR) Sensor Connector, Part 1 Of 2:

Digital Transmission Range (TR) Sensor Connector, Part 2 Of 2:

Transmission Internal Harness Diagram, Part 1 Of 3:

Transmission Internal Harness Diagram, Part 2 Of 3:

Transmission Internal Harness Diagram, Part 3 Of 3:

The Rotunda Transmission Tester is used to diagnose electronically controlled transmissions and is used in conjunction with the pinpoint tests. The tests should be performed in order. Installing the Rotunda Transmission Tester allows separation of the vehicle electronics from transmission electronics; refer to the Rotunda Transmission Tester manual for these tests.
- Bench Testing - Engine Off
- Resistance/Continuity Test
- Solenoid Voltage Test
- Dynamic Testing - Engine On
- EPC Solenoid
- Transmission Engagements
- Upshifts/Downshifts
- Torque Converter Clutch (TCC) Engagement
- Coast Clutch Engagement
- Turbine Shaft Speed (TSS) Sensor
- Digital Transmission Range (TR) Sensor Testing
- Resistance/Continuity Test
- Sensor Test
- Switch Test - Park/Neutral, Backup Lamp, and Optional Circuits