Description

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. Another example, the technician can command a shift solenoid to turn on or off when performing 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 individual test modes for vehicle requirement.
- 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 Powertrain Control Module (PCM) will cancel the OSC value and NO ERROR message will appear.
- The OSC value [XXX] may be sent anytime to cancel OSC.

NOTE: To operate OSC the digital Transmission Range (TR) Sensor and the Vehicle Speed Sensor (VSS) must be operational. No Diagnostic Trouble Codes (DTCs) related to the digital TR sensor or the VSS can be present.

OUTPUT STATE CONTROL (OSC) PROCEDURES:
- Perform 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 (PCM)."
- Select "Diagnostic Test Mode."
- Select "Key On Engine Off (KOEO) On-Demand Self Test and Key On Engine Running (KOER) On-Demand Self Tests."
- Perform test and record Diagnostic Trouble Codes (DTCs).
- Repair all NON-transmission DTCs.
- Repair all Vehicle Speed Sensor (VSS) and digital Transmission Range (TR) sensor DTCs.
- Ensure that VSS/digital TR sensors are functional.
- Select "Active Command Modes."
- Select "Trans - Bench Mode" or "Trans - Drive Mode."