Tester Description

DESCRIPTION
Use the Transmission Tester to diagnose electronically controlled transmissions. The following instructions describe the setup and use of this tester in the pinpoint tests for the E40D.

E4OD Overlay:

Overlay and Cable Correctly Installed LEDs: Only LEDs with the (O) symbol will light when the overlay and cable match correctly.

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. TFT pin jacks: test points for transmission fluid temperature sensor.

LEDs AND CONTROLS
1. Status LEDs: LED off when not activated by tester (solenoid not activated, open circuit or signal line short to ground). LED will turn GREEN when activated by tester and current draw is correct. LED will turn RED when activated by tester and current draw is excessive (short to battery positive voltage [B+]). All LEDs light ORANGE during On-Board Diagnostic.
2. Solenoid activate buttons energize respective solenoids during click testing and activate selected circuits during DRIVE mode testing.
3. Bench/drive switch selects operating mode, either BENCH or DRIVE.
> Solenoid select/gear select switch has three functions.
- BENCH MODE acts as shift solenoid selector for click testing.
- DRIVE MODE acts as forward gear selector in place of Powertrain Control Module (PCM) controlled shifting. Hydraulic safety mechanisms and overrides are built into the transmission.
- OHMS CHECK allows you to measure resistance (ohms).

INSTRUCTIONS

NOTE:The Transmission Tester must be used to perform the pinpoint tests.

The Transmission Tester and Cable and Overlay allow a technician to operate the electrical portion of the transmission independently of the vehicle electronics, which allows the technician to determine transmission concerns. The transmission tester use is divided into six steps:
- preliminary inspections
- installation procedures
- static testing - engine OFF
- dynamic testing - engine ON
- Digital Transmission Range (DTR) sensor testing
- disconnecting the tester