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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 505 (Automatic Transmission - 2ML70 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Control Solenoid Valve and Transmission Control Module Assembly Output Shaft Speed Input Test >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the wiring harness connector from the B14A Automatic Transmission Output Shaft Speed Sensor.
  2. Connect the red lead of J 38522  generator to the OSS voltage circuit terminal A and the black lead to the OSS signal circuit terminal B.
    1. Adjust the J 38522  generator Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50.
    2. Ignition ON, verify the Transmission OSS parameter display is 100-400 RPM.
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