Tester Description

Rotunda Transmission Tester.:

Tester Jacks
1. VPWR Pin Jacks (red): Vehicle Power (VPWR) test points for solenoid circuits.
2. Solenoid (TCC, EPC) Signal Line Pin Jacks (black): Signal line test points for solenoid circuits.
3. BAT + (red) and BAT - (black) Pin Jacks: Battery reference points when measuring circuits for shorts.
4. TOT Pin Jacks: Test points for transmission oil temperature sensor.
5. TSS Pin Jacks: Test points for transmission speed sensor.

Tester LEDs and Controls
1. Overlay and Cable Correctly installed LEDs: Only LEDs with symbol and cable correctly match.
2. Status LEDs: LED OFF when not activated by tester (solenoid not activated, open circuit or signal line short to ground). LED "GREEN" when activated by tester and current draw is correct. LED "RED" when activated by tester and current draw is excessive (short to Battery Positive Voltage [B+]). All LEDs light orange during On-Board Diagnostic.
3. Solenoid Activate Buttons: Energize respective solenoids during click testing and activate selected circuits during DRIVE mode testing.
4. Bench/Drive Switch: Selects operating mode, either BENCH or DRIVE.
5. Solenoid Select/Gear Select Switch: Has three functions:
- In BENCH MODE: acts as shift solenoid selector for click testing.
- In DRIVE MODE: acts as forward gear selector in place of vehicle's powertrain control module controlled shifting. Hydraulic safety mechanisms and overrides are built into the transmission.
- In OHMS CHECK: allows you to measure ohms.