Output Shaft Speed Input Test: Notes

WARNING: This page is about a different variant/trim than selected.

Special Tools

EL 38522 Variable Signal Generator

For equivalent regional tools, refer to Special Tools .

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.

Vehicle OFF, remove the control valve body cover. Refer to Control Valve Body Cover Removal .
Vehicle OFF, disconnect the Automatic Transmission Wiring Harness - Control Solenoid Valve from the OSS wiring harness.
Vehicle ON, test for 8.3 - 9.3 volts between terminals 1 and 2.
- If not within the specified range
  Test the Automatic Transmission Wiring Harness - Control Solenoid Valve for an open, short to ground or short to voltage. If the harness tests OK, replace the T6 Power Inverter Module.
- If within the specified range
Vehicle OFF, using the EL 35616 terminal test kit, connect the EL 38522 variable signal generator red lead to the OSS signal circuit terminal 2 on the Automatic Transmission Wiring Harness - Control Solenoid Valve.
Connect the black lead from the EL 38522 variable signal generator to ground.
Set the EL 38522 variable signal generator to 8 volts, the frequency to 120 Hz and the percent duty cycle to 50 or the normal position.
Vehicle ON, verify with a scan tool the Transmission OSS parameter is between 375 - 400 RPM.
- If not within the specified range
  Replace the T6 Power Inverter Module.
- If within the specified range
Test the Automatic Transmission Wiring Harness - Control Solenoid Valve for an open, short to ground or short to voltage.
- If Automatic Transmission Wiring Harness - Control Solenoid Valve is shorted or open
  Replace the Automatic Transmission Wiring Harness - Control Solenoid Valve harness.
- If all circuits test normal
Test or replace the B14A Transmission Output Shaft Speed Sensor.