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
* J 35616 - GM-Approved Terminal Test Kit
* J 38522 - Variable Signal Generator





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

Transmission Input Speed Sensor
1. Ignition OFF, disconnect the ISS wiring harness connector from the control solenoid (w/body and TCM) valve assembly.
2. Using the J 35616 - terminal test kit, connect the J 38522 - variable signal generator red lead to the ISS signal circuit terminal A on the TCM.
3. Connect the black lead from the J 38522 - variable signal generator to ground.
4. Set the J 38522 - variable signal generator to 5 volts, the frequency to 120, and the percent duty cycle to 50 or the normal position.
5. Ignition ON, verify with a scan tool the Transmission ISS parameter is between 100-400 RPM.

• If not within the specified range, replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement 6T30/6T40/6T45 - Automatic Transmission.

Transmission Output Speed Sensor
1. Ignition OFF, disconnect the OSS wiring harness connector from the control solenoid (w/body and TCM) valve assembly.
2. Using the J 35616 - terminal test kit, connect the J 38522 - variable signal generator red lead to the OSS signal circuit terminal A on the TCM.
3. Connect the black lead from the J 38522 - variable signal generator to ground.
4. Set the J 38522 - variable signal generator to 5 volts, the frequency to 120, and the percent duty cycle to 50 or the normal position.
5. Ignition ON, verify with a scan tool the Transmission OSS parameter is between 100-400 RPM.

• If not within the specified range, replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement 6T30/6T40/6T45 - Automatic Transmission.