Transmission Tester Introduction

Tester Jacks
1. VPWR pin jacks (red): vehicle power test points for solenoid circuits.
2. TCC, EPC, CCS, SS1, SS2, and SS3 pin jacks (black): solenoid signal test points for solenoid circuits.
3. BAT + (red) and BAT - (black) pin jacks: battery reference points when measuring for short circuits.
4. TFT pin jacks: test points for transmission fluid temperature sensor.
5. TSS pin jacks: test points for turbine shaft speed sensor.

Tester LED's and Controls
1. Overlay and cable correctly installed LED's: only LED's with symbol and cable correctly match.
2. Status LED's: 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).

Note: All LED's light orange during On-Board Diagnostic.

3. Solenoid Activate Buttons: energize respective solenoids and selected circuits.
4. Bench/Drive Switch: selects operating mode.
5. Solenoid/Gear Select Switch: has three functions:
^ Bench Mode: acts as shift solenoid selector for click testing.
^ Drive Mode: acts as gear selector in place of PCM control.

Note:
^ Hydraulic safety mechanisms are built into the transmission.
^ Ohms Check: allows circuit resistance tests.