Rotunda Transmission Tester

The Rotunda Transmission Tester is used to diagnose electronically controlled transaxle and is used in conjunction with the pinpoint tests. The tests should be carried out in order. Installing the Rotunda Transmission Tester allows separation of the vehicle electronics from transaxle 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
- Transaxle Engagement
- Upshifts/Downshifts
- Torque Converter Clutch (TCC) Engagement
- Coast Clutch Enhancement
- 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

Use Transmission Tester and CD4E Update Kit to diagnose electronically controlled transaxles. The following instructions outline the set-up and use of this tester in the pinpoint tests for the CD4E.