NOTE: In order to operate OSC, a KOEO On-Demand Self Test and a KOER On-Demand Self Test may need to be carried out to verify that no diagnostic trouble codes (DTCs) related to the digital transmission range (TR) sensor or the vehicle speed sensor (VSS) are present.

Output state control (OSC) allows the technician to operate the main components of the transmission quickly and easily and provides accurate information to correctly diagnose the transmission. OSC allows the technician to take control of certain parameters to operate the transmission. For example, OSC allows the technician to shift the transmission only when commanding a gear change. If the technician commands first gear in OSC, the transmission will remain in first gear until the technician commands the next gear. For another example, the technician can command a shift solenoid to turn on or off while carrying out an electrical circuit check. OSC has two modes of operation for transmission, the BENCH MODE and the DRIVE MODE. Each mode/parameter has a unique set of vehicle operating requirements that the technician is required to meet before being allowed to operate OSC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Output State Control (OSC) Mode: Notes

Use the Manual With the Right Hardware

When to See a Mechanic