Circuit/System Verification

Verify fuse F23 is not open, Fuse Block - Underhood.
- If the fuse is open
  Test the Run/Crank Ignition 1 voltage circuit for a short to ground. Refer to Testing for Short to Ground .
- If the fuse is not open
Ignition ON, engine OFF.
Verify P0562 or P0563 is not set.
- If the DTC is set
  Refer to DTC P0562 or P0563.
- If the DTC is not set
Engine running. Transmission in Park. Brake NOT applied.
Verify while driving at low speed that the scan tool Transmission OSS parameter varies with actual vehicle speed and does not drop out.
- If the Transmission OSS does not vary with actual vehicle speed or drops out
  Refer to Circuit/System Testing.
- If the Transmission OSS does vary with actual vehicle speed and does not drop out
Verify P0721 is only set as a history DTC.
- If the DTC is set as current
  Refer to Circuit/System Testing.
- If the DTC is set as history
Visually inspect each connector terminal of the B14A Output Shaft Speed Sensor connector and the K71 Transmission Control Module for damage or corrosion. Repair as necessary.
NOTE: After inspection, apply Nyogel lubricant 760G to each connector terminal. Ensure each connector and CPA is correctly seated.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set.
- If the DTC sets
  Refer to Circuit/System Testing.
- If the DTC does not set
All OK.