DT-47825 Control Solenoid Test Plate
The purpose of this procedure is to test the function of the control solenoid (w/ body and TCM) valve assembly solenoids for a gross stuck open or stuck closed condition. Install the DT-47825 to the valve body mounting surface of the control solenoid (w/ body and TCM) valve assembly with bolt. Pressurized air is passed into the aluminum test block, through the control solenoid (w/ body and TCM) valve assembly solenoid passage and back to a pressure gage on the test block. The pressure gage indicates open if air pressure is passed through the solenoid, or closed if the solenoid is unable to pass air through. A scan tool is used to command the solenoids ON and OFF. While watching the pressure gage, one can determine if the valve functions normally. The recommended shop air pressure for this test is between 90-100 psi.
Tighten
Tighten the bolts to 5 N·m (44 lb in).
Important: With the key on, engine off (KOEO), the TCM will normally cycle some of the transmission solenoids On and Off to facilitate keeping the ports and solenoids clean and free of dirty. This dither function is a normally activity and will cause the valves to cycle open and closed quickly when the TCM is powered up. This can cause the psi gage to fluctuate high and low as the valves open and close. This may cause some air to exit the ports where the psi gage is not connected as those solenoids cycle on and off.
Drain the TCM of excess transmission fluid before attaching to test block and use caution when attaching air to test block air inlet.Solenoid | Port On Test Block | Key On, Engine Off (KOEO) Normal State |
---|---|---|
PC Solenoid 1 | G | No PSI flow to gage |
PC Solenoid 2 | C | No PSI flow to gage |
PC Solenoid 3 | A | No PSI flow to gage |
PC Solenoid 4 | B | No PSI flow to gage |
PC Solenoid 5 | F | No PSI flow to gage |
Shift Solenoid 1 | H | No PSI flow to gage |
Shift Solenoid 2 | D | No PSI flow to gage |
TCC Pressure Control Solenoid | E | No PSI flow to gage |