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 Kit

For equivalent regional tools, refer to Special Tools 2ML70 - Automatic Transmission.

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

The purpose of this procedure is to test the functionality of the control solenoid valve assembly solenoids for a gross stuck open or stuck closed condition, or a faulty transmission fluid pressure switch. DT 47825-1 is bolted to the control solenoid valve assembly on the valve body mounting surface. Pressurized air is passed into the aluminum test block, through the control solenoid valve assembly solenoid passage and back to the outlet port on the test block. A scan tool is used to command the solenoids ON and OFF. While observing the airflow, one can determine the valve functionality. The recommended shop air pressure for this test is regulated to 90-100 psi.

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 Transmission Fluid Pan Replacement Service and Repair and Automatic Transmission Fluid Filter and Auxiliary Fluid Pump Filter Replacement Automatic Transmission Fluid Filter and Auxiliary Fluid Pump 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 Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.
5. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection procedure.

Solenoid Testing Procedure




1 - Regulated Air Supply
2 - Test Ports
3 - Scan Tool
4 - Test Pressure Gauge
5 - Electrical Connector Sleeve

Caution: The automatic transmission (A/T) electrical connector passage sleeve allows the test tool harness to be correctly orientated for electrical operation of the transmission control module (TCM). Do not connect the test harness to the TCM without using the A/T Electrical Connector Passage Sleeve. Failure to use the sleeve could allow the test harness to be incorrectly positioned which will result in permanent TCM damage.

Caution: To avoid solenoid overheating and possible internal damage, do not continuously operate the solenoid for more than 2 minutes at a time. Drain the TCM of excess transmission fluid before attaching to test block and use caution when attaching air to test block air inlet.

Note: With the ignition ON and the engine OFF, the transmission control module (TCM) will normally cycle some of the transmission solenoids On and Off to facilitate keeping the ports and solenoids clean and free of debris. This dither function is a normal activity and will cause the valves to cycle open and closed quickly when the TCM is powered up. This may cause some air to exit the ports where the PSI gauge is not connected as those solenoids cycle on and off.

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 - kit.
3. Bolt the DT 47825 - kit 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 - kit to the vehicle harness and to the control solenoid valve assembly. Engage the connector locks.
5. Turn the ignition ON.
6. Cover the DT 47825 - kit test block ports with a shop towel. Transmission fluid may exit these ports when the solenoids are commanded ON.
7. Connect regulated shop air to the DT 47825 - kit air inlet. Do not exceed the recommended air pressure of 620.5-689.4 Kpa (90-100 psi).
8. With the ignition ON and the scan tool communicating with the vehicle, command the solenoid in question On and Off. Observe the airflow at the appropriate test port 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.
9. The solenoid should allow air pressure to flow or prevent air pressure flow depending on the solenoid state indicated in the table below.
10. Perform each ignition state and command several times to determine the condition of the solenoid in question. Release the test air pressure from the pressure the gauge between solenoid tests.





Transmission Fluid Pressure Switch Test Procedure

Control Solenoid Valve Assembly




1 - Pressure Control Solenoid 2
2 - Pressure Control Solenoid 4
3 - Shift Solenoid 2
4 - 16 Pin Connector
5 - Line Pressure Control Solenoid
6 - Transmission Fluid Pressure Switch 4
7 - Pressure Control (PC) Solenoid 6 - Not Used
8 - Pressure Control (PC) Solenoid 3
9 - Transmission Fluid Pressure Switch 1
10 - Transmission Fluid Pressure Switch 3
11 - Transmission Fluid Pressure Switch 5
12 - Pressure Control Solenoid 5
13 - Shift Solenoid 1

1. Remove the DT 47825-1 from the control solenoid valve assembly.
2. With the ignition ON and the scan tool communicating with the vehicle, using a soft blunt object such as the eraser end of a pencil, depress each transmission fluid pressure switch port. The corresponding TFP Switch parameter on the scan tool display should display HI when depressed and Low when released.

• If the control solenoid valve assembly fails any of the above tests, replace the control solenoid valve assembly.
• If the control solenoid valve assembly passes the above tests, the concern is internal to the transmission.

Repair Instructions

Perform the Reset Transmission Adapts 2ML70 - Automatic Transmission after repairs have been completed.

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for Control Solenoid Valve Assembly replacement, programming and setup.