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

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

Special Tools

J 38522 - Variable Signal Generator





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

1. Ignition OFF, remove the control valve body cover. Refer to Control Valve Lower Body and Upper Body Replacement (2MT70 - Automatic Transmission).
2. Connect the TCM harness connector.
3. Disconnect the output speed sensor (OSS) harness connector from the control solenoid (w/body and TCM) valve assembly.
4. Connect the J 38522 - variable signal generator between the supply voltage terminal B and OSS signal terminal A at the control solenoid (w/body and TCM) valve assembly.
5. Set the J 38522 - variable signal generator signal to 8 volts, the frequency to 120 and the percent duty cycle to 50.
6. Ignition ON, observe the scan tool Transmission OSS parameter. The scan tool Transmission OSS parameter should be between 100-400 RPM.

• If not the specified value, replace the control solenoid (w/body and TCM) valve assembly.

7. Test the output speed sensor harness for an open, short to ground or short to voltage.

• If all circuits test normal, test or replace the output speed sensor.