Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test

Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test

Special Tools

* EL 35616 - GM-Approved Terminal Test Kit

* EL 38522 - Variable Signal Generator

For equivalent regional tools, refer to Special Tools Tools and Equipment.





The purpose of this test is to provide a simulated input/output speed sensor (ISS/OSS) signal to the control solenoid valve assembly ISS/OSS input circuits.

Transmission Input Speed Sensor

1. Ignition OFF, disconnect the ISS wiring harness connector X3 (1) from the control solenoid valve assembly.

2. Ignition ON, test for 11-14 volts at terminal B.

• If not within the specified range, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.

3. Ignition OFF, using the EL 35616 - terminal test kit, connect the EL 38522 - variable signal generator red lead to the ISS signal circuit terminal A on the TCM.

4. Connect the black lead from the EL 38522 - variable signal generator to ground.

5. Set the EL 38522 - variable signal generator to 5 volts, the frequency to 300 Hz, and the percent duty cycle to 50 or the normal position.

6. Ignition ON, verify with a scan tool the Transmission ISS parameter is between 495-505 RPM.

• If not within the specified range, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.

Transmission Output Speed Sensor

1. Ignition OFF, disconnect the OSS wiring harness connector X4 (2) from the control solenoid valve assembly.

2. Ignition ON, test for 11-14 volts at terminal B.

• If not within the specified range, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.

3. Ignition OFF, using the EL 35616 - terminal test kit, connect the EL 38522 - variable signal generator red lead to the OSS signal circuit terminal A on the TCM.

4. Connect the black lead from the EL 38522 - variable signal generator to ground.

5. Set the EL 38522 - variable signal generator to 5 volts, the frequency to 300 Hz, and the percent duty cycle to 50 or the normal position.

6. Ignition ON, verify with a scan tool the Transmission OSS parameter is between 745-825 RPM.

• If not within the specified range, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.