Control Solenoid Valve And Transmission Control Module Assembly Solenoid Performance Test: Notes

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

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).