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

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Special Tools - J 38522 And J 35616

Courtesy of GENERAL MOTORS CORP.

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.

Ignition OFF, remove the control valve body cover. Refer to Control Valve Lower Body and Upper Body Replacement .
Connect the TCM harness connector.
Disconnect the output speed sensor (OSS) harness connector from the control solenoid (w/body and TCM) valve assembly.
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.
Set the J 38522: variable signal generator signal to 8 volts, the frequency to 120 and the percent duty cycle to 50.
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.
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.