Output State Control (OSC) Mode: Notes

Output state control (OSC) allows the technician to take control of certain parameters to function the transmission. For example, OSC allows the technician to shift the transmission only when commanding a gear change. If the technician commands 1st gear in OSC, the transmission will remain in 1st 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.

• The vehicle requirements MUST BE MET when SENDING the OSC value. Refer to the vehicle requirements for each individual test.
• If the vehicle requirements are NOT MET when SENDING the OSC value, an ERROR MESSAGE will appear. When the ERROR MESSAGE is received, OSC is aborted and must be restarted.
• If AFTER SENDING an OSC value and the vehicle requirements are no longer met, the PCM will cancel the OSC value and NO ERROR message will appear.
• The OSC value XXX may be sent anytime to cancel OSC.

OUTPUT STATE CONTROL (OSC) PROCEDURES: 

• Carry out visual inspection and vehicle preparation as required.
• Select "Vehicle and Engine Selection" menu.
• Select appropriate vehicle and engine.
• Select "Diagnostic Data Link."
• Select "Powertrain Control Module."
• Select "Diagnostic Test Mode."
• Select "KOEO On-Demand Self Test and KOER On-Demand Self Tests."
• Carry out test and record DTCs.
• Repair all NON-transmission DTCs.
• Repair all VSS and digital TR sensor DTCs.
• Make sure that VSS/digital TR sensors are functional.
• Select "Active Command Modes."
• Select "Trans - Bench Mode or Trans - Drive Mode."