Volt

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

Special Tools

EL 38522 Variable Signal Generator

The purpose of this test is to provide a simulated output speed sensor signal to the control solenoid valve assembly Transmission Output Shaft Speed Sensor input circuits in order to verify the control solenoid valve assembly is able to process the output speed sensor signal.

1. Vehicle OFF, remove the control valve body cover. Refer to Control Valve Body Cover Removal .
2. Connect the Q8 control solenoid valve assembly X1 harness connector.
3. Vehicle OFF, disconnect the OSS wiring harness connector X4 (1) from the Q8 control solenoid valve assembly.
4. Vehicle ON, test for 8.3-9.3 volts at terminal A and ground.

⇒	If not within the specified range, replace the Q8 control solenoid valve assembly.

5. Vehicle OFF, using the EL 35616 terminal test kit , connect the EL 38522 variable signal generator red lead to the OSS signal circuit terminal B on the TCM.
6. Connect the black lead from the EL 38522 variable signal alternator to ground.
7. Set the EL 38522 variable signal alternator to 8 volts, the frequency to 120 Hz, and the percent duty cycle to 50 or the normal position.
8. Vehicle ON, verify with a scan tool the Transmission OSS parameter is between 375-400 RPM.

⇒	If not within the specified range, replace the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .

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

⇒	If all circuits test normal, test or replace the B14A Transmission Output Shaft Speed Sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.