Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
Special Tools
DT-47825 - Control Solenoid Test Plate
The purpose of this procedure is to test the operation of the control solenoid valve assembly for a stuck open or stuck closed solenoid. The DT-47825 - control solenoid test plate bolts to the mounting surface of the control solenoid valve assembly. Pressurized air is routed into the aluminum test block, through the control solenoid valve assembly, and back to the gauge on the test block.
A pressure gauge is used to measure the pressurized air through the solenoid control ports. When a solenoid is commanded ON with the scan tool, pressurized air flows through the solenoid control port and displays on the pressure gauge. When the solenoid is commanded OFF with the scan tool, there is no pressurized air flow through the solenoid control port to the pressure gauge. The recommended shop air pressure for this test is 620.5-690.4 Kpa (90-100 psi).
Control Solenoid Valve Assembly with Control Solenoid Test Plate
1 - Filter Plate Assembly
2 - Control Solenoid Valve Assembly
3 - DT-47825 Control Solenoid Test Plate
4 - Air Connection Port
5 - Transmission 16-Way Pass-Through Connector
6 - Electrical Connector Slide Lock
7 - A/Trans Manual Shift Shaft Position Switch Assembly Electrical Connector
8 - A/Trans Manual Shift Shaft Position Switch Assembly
9 - Bolt M6 x 14.5
Note:
To avoid solenoid overheating and possible internal damage, do not continuously operate the solenoid for more than 2 minutes at a time.
The TCM will normally cycle some of the transmission solenoids ON and OFF to keep the solenoid passages clean and clear. This is a normal function and may cause the valves to cycle open and closed quickly when the TCM is powered up. This can make the pressure gauge needle flicker or move from high and low as the valves open and close, allowing air to exit the ports where the pressure gauge is not connected.
Warning
Use of eye goggles is necessary to prevent personal injury.
Warning
To avoid transmission fluid contact with exposed skin, use shop towels to cover the test plate parts in order to prevent fluid from being released into the air, as any remaining transmission fluid in the control solenoid valve assembly will be forced out, and bodily injury may occur.
It is necessary to drain the control solenoid valve assembly of all remaining transmission fluid before attaching the test plate. Use caution when attaching air to the test plate, as any residual transmission fluid in the control solenoid valve assembly will be forced out. Use shop towels to cover the test plate ports in order to prevent fluid from being released into the air.
Preliminary Procedures
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.
2. Remove the transmission fluid pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement.
3. Remove the transmission electrical connector. Refer to Automatic Transmission Electrical Connector Passage Sleeve Replacement Automatic Transmission Electrical Connector Passage Sleeve Replacement.
4. Remove the control solenoid valve assembly from the transmission. Refer to Control Valve Lower Body and Upper Body Replacement 6L45/6L50/6L80/6L90 - Automatic Transmission.
5. Ensure that the manual shift shaft position switch is disconnected and removed before performing the test. Failure to disconnect the switch will cause inaccurate test results and possible misdiagnosis.
Solenoid Testing Procedure
1 - Regulated Air Supply
2 - Test Ports
3 - Scan Tool
4 - Test Pressure Gauge
5 - Electrical Connector Sleeve
Caution:
Do not probe any circuit with a multi-meter. Resistance tests across the serial data bus circuits will damage the TCM.
Caution:
The TCM connector sleeve allows the test tool harness to be correctly orientated for electrical operation of the TCM. Do not connect the test harness to the TCM without using the connector sleeve. Failure to use the sleeve could allow the test harness to be incorrectly positioned which will result in permanent TCM damage.
1. Align and install the electrical connector sleeve to the control solenoid valve assembly and secure with the connector slide lock.
2. If necessary, clean each side of the filter plate assembly and install the filter plate assembly back on the control solenoid valve assembly. Clean the mounting surface of the DT-47825 - control solenoid test plate.
3. Bolt the DT-47825 - control solenoid test plate to the control solenoid valve assembly mounting surface. Use the bolts and washers supplied with the tool to attach the test block. Tighten the bolts to 5 Nm (44 lb in).
4. Connect the test harness supplied with the DT-47825 - control solenoid test plate to the vehicle harness and to the TCM. Engage the connector locks.
5. Connect shop air to the DT-47825 - control solenoid test plate air inlet. Do not exceed the recommended air pressure of 620.5-689.4 Kpa (90-100 psi).
6. Connect the test pressure gauge to the test port for the solenoid to be tested.
7. With the ignition ON and the scan tool communicating with the vehicle, command the solenoid to be tested ON and OFF. Watch the air pressure gauge for a change as you command the solenoid. Refer to Control Solenoid Valve Assembly Solenoid Performance Test Plate to Component Identification for correct solenoid function and test plate port connections for the solenoid being tested.
8. The solenoid should allow air pressure to flow when commanded ON and prevent air pressure flow when commanded OFF. The test results are read on the pressure gauge.
9. Command the solenoid valve ON and OFF several times to determine the condition of the solenoid in question. Release the test air pressure from the pressure gauge between solenoid tests.
