Using Output State Control (OSC) and Monitoring PIDs
To confirm that the OSC command was sent by the scan tool and the PCM has accepted the OSC command, a corresponding PID for each OSC parameter must be monitored. After sending the OSC command, the corresponding PID value should be the same as the OSC command. Additional PIDs should be monitored to help the technician accurately diagnose the transmission. The following is a list of PIDs to monitor while using OSC.
| PID Name | PID Description | Units |
|---|---|---|
| APP | Accelerator Pedal Position | Percentage |
| GEAR | GEAR Commanded State (not actual) | Mode |
| GEAR_MAX | Highest Gear Allowed | Number |
| GEAR_OSC | Gear Commanded by Output State Control | Mode |
| GEAR_RAT | Gear Ratio | Ratio |
| LINEDSD | Line Pressure Control Desired | Pressure |
| OD_CANCEL | Overdrive Cancel Switch/Hold Switch | Mode |
| OSSFM | Output Shaft Speed Failure Mode | Fault |
| OSS_F | Output Shaft Speed Reliable | Fault |
| OSS_SRC | Unfiltered Output Shaft Speed | rpm |
| PCA | Pressure Control Solenoid A | Pressure |
| PCAAMP | Pressure Control Solenoid A | Current |
| PCA_F | Pressure Control Solenoid A | Fault |
| PCFM | Pressure Control Failure Mode | Fault |
| RPM | Engine Revolutions Per Minute | rpm |
| SHIFT_DROP | Shift rpm Drop in Input Shaft Speed Below Expected | rpm |
| SHIFT_FLRE | Shift rpm Rise in Input Shaft Speed Above Expected | rpm |
| SHIFT_ID | Shift Identification of Shift PIDs Lag, Time, Flare and Drop | Number |
| SHIFT_LAG | Shift Time Elapsed from 10% to 90% of Complete | Time |
| SHIFT_TIME | Shift Time Elapsed from Commanded to 10% of Complete | Time |
| SSA/SS1 | Shift Solenoid No. 1 Commanded State | Mode |
| SSA/SS1_F | Shift Solenoid No. 1 Status | Fault |
| SSB/SS2 | Shift Solenoid No. 2 Commanded State | Mode |
| SSB/SS2_F | Shift Solenoid No. 2 Status | Fault |
| TCC | Torque Converter Clutch Solenoid Commanded State | Mode, percentage |
| TCCFM | Torque Converter Unlocking Due to Slipping | Fault |
| TCCPC | Torque Converter Clutch Pressure Control | Pressure |
| TCC_F | Torque Converter Clutch Fault | Fault |
| TCC_OSC | Output State Control of Torque Convertor Clutch | Mode |
| TCC_OT | Transmission Over-Temperature Lockup Mode | Fault |
| TCC_RAT | Transmission Slip Ratio | Ratio |
| TCS | Overdrive Cancel Switch/Hold Switch | Mode |
| TCSLIP_ABSL | Absolute Value of Slip | rpm |
| TC_SLIPACT | Torque Convertor Slip Actual | rpm |
| TC_SLIPDSD | Torque Convertor Slip Desired | rpm |
| TFT | Transmission Fluid Temperature | Voltage, temperature |
| TFT_F | Transmission Fluid Temperature Status | Fault |
| TR | Transmission Range | Mode |
| TR1 | Digital Transmission Range Switch 1 | Mode |
| TR2 | Digital Transmission Range Switch 2 | Mode |
| TR3 | Digital Transmission Range Switch 3 | Mode |
| TR3_V | Digital Transmission Range Switch 3 | Voltage |
| TR4 | Digital Transmission Range Switch 4 | Mode |
| TRAN_OT | Transmission Over-Temperature | Fault |
| TRAN_RAT | Transmission Gear Ratio | Ratio |
| TR_F | Transmission Range Status | Fault |
| TSS | Turbine Shaft Speed Sensor | rpm |
| TSSFM | Turbine Shaft Speed Sensor Failure Mode | Fault |
| TSS_F | Turbine Shaft Speed Sensor Reliable | Fault |
| TSS_SRC | Unfiltered Turbine Shaft Speed Sensor | rpm |