Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
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Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
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Special Tools
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DT-47825-100 Control Solenoid Test Kit
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DT-47825-20 Adapter Harness
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The purpose of this procedure is to test the functionality of the control solenoid (w/body and TCM) valve assembly solenoids for a gross stuck open or stuck closed condition. The DT-47825-100 test block is bolted to the control solenoid (w/body and TCM) valve assembly on the valve body mounting surface. 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 gauge on the test block. The pressure gauge indicates open if air pressure is passed through the solenoid, or closed if the solenoid is unable to pass air through. A diagnostic tool is used to control the solenoid valves ON and OFF. The valve function can be decided when looking at the pressure gauge. The recommended shop air pressure for this test is 90-100 psi.
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1.
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Remove the control solenoid (w/body and TCM) valve assembly from the transmission.
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2.
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Bolt the DT-47825-100 test block to the control solenoid (w/body and TCM) valve assembly on the valve body 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) using a center out alternating torque sequence.
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3.
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Install the pressure gauge to the affected solenoid air port. Reference component to air port table.
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4.
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Connect the shop air pressure line to the DT-47825-100 test block air psi inlet port.
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5.
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Connect DT-47825-20 to vehicle and control solenoid (w/body and TCM) valve assembly.
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6.
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Warning
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Do not energize the solenoids for more than two minutes or the solenoids could be damaged.
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Ignition ON, with a scan tool command the solenoid in question On and Off. Watch the air pressure gauge and look for the change in pressure as you command the valve On and Off. The valve should allow air pressure to flow through the valve port to the gauge with a result of pressure reading on the gauge. If the valve is stuck closed, no pressure change will occur. Command the solenoid valve On and Off several times to determine the state of the solenoid valve in question. Release the air pressure in the gauge between pressurization tests.
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Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Block to Component Identification
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COMPONENT
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PORT ON TEST BLOCK
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Key On, Engine Off (KOEO) Normal State
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PC Solenoid 1
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A
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Regulated PSI flow to gauge
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PC Solenoid 2
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C
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No PSI flow to gauge
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PC Solenoid 3
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G
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Full PSI flow to gauge
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PC Solenoid 4
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B
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No PSI flow to gauge
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PC Solenoid 5
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F
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No PSI flow to gauge
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Shift Solenoid 1
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H
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Full PSI flow to gauge
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Shift Solenoid 2
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D
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No PSI flow to gauge
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TCC Pressure Control Solenoid
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E
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No PSI flow to gauge
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Note
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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 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 can cause the psi gauge to flicker high and low as the valves open and close. This may cause some air to exit the ports where the psi gauge is not connected as those solenoids cycle on and off.
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Drain the TCM of excess transmission fluid before attaching to test block and use caution when attaching air to test block air inlet.
