OSC - Transmission Bench Modes

The following Transmission Bench Modes may be used or required during diagnostics.


SSA, SSB AND TCC IN BENCH MODE:
The BENCH MODE allows the technician to perform electrical circuit checks on the following components:
- SSA - activates SS#1 OFF or ON
- SSB - activates SS#2 OFF or ON
- TCC - activates TCC OFF or ON

OSC "SSA, SSB, TCC" BENCH MODE Operates ONLY when:
- VSS and digital TR sensor are operational.
- no VSS and digital TR sensor DTCs.
- transmission range selector lever in P key ON - engine OFF.

OSC Command Values:
- [OFF] - turns solenoid OFF.
- [ON] - turns solenoid ON.
- [XXX] - cancels OSC value sent.
- [SEND] - sends the values to PCM.

BENCH MODE Procedure for SSA, SSB and TCC Follow operating instructions from the NGS menu screen:
- Select "Output State Control."
- Select "Trans - Bench Mode."
- Select "PIDs" to be monitored.
- Monitor all selected PIDs during test.
- Select; "Parameters - SSA, SSB or TCC."
- Select "ON" to turn solenoid ON.
- Press "SEND" to send command ON.
- Select "OFF" to turn solenoid OFF.
- Press "SEND" to send command OFF.
- Select "XXX" to cancel at any time.
- Press "SEND."

EPC IN BENCH MODE:
The BENCH MODE is also used to test the functionality of the transmission's electronic pressure control. During BENCH MODE, the EPC solenoid can ramp in increments of 15 PSI from zero to 90 PSI and 90 to zero PSI.
The OSC functions for the parameter EPC allows the technician to choose the following options:
- EPC - Activates E,PC to selected values.
- [00] - sets EPC pressure to 00 PSI.
- [15] - sets EPC pressure to 15PSI.
- [30] - sets EPC pressure to 30 PSI.
- [45] - sets EPC pressure to 45 PSI.
- [60] - sets EPC pressure to 60 PSI.
- [75] - sets EPC pressure to 75 PSI.
- [90] - sets EPC pressure to 90 PSI.

OSC "EPC" BENCH MODE Operates ONLY when:
- VSS and digital TR Sensor are operational.
- No VSS and digital TR Sensor DTCs.
- Transmission range selector lever in P.
- Pressure gauge installed.
- Key ON.
- Engine ON Engine RPM at 1500.

OSC Command Values
- [00] - sets EPC pressure to 00 PSI.
- [15] - sets EPC pressure to 15 PSI.
- [30] - sets EPC pressure to 30 PSI.
- [45] - sets EPC pressure to 45 PSI.
- [60] - sets EPC pressure to 60 PSI.
- [75] - sets EPC pressure to 75 PSI.
- [90] - sets EPC pressure to 90 PSI.
- [OFF] - turns solenoid off.
- [ON] - turns solenoid on.
- [XXX] - cancels OSC value sent.
- [SEND] - sends the values to PCM.

BENCH MODE PROCEDURE FOR EPC
Following operating instructions from the NGS menu screen.
- Select "Output State Control."
- Select "Trans - Bench Mode."
- Select "PIDs" to be monitored.
- Monitor all selected PIDs during test.
- Select "Parameters - EPC."
- Select Value "0 - 90 psi."
- Press "SEND" to send command.
- Select "XXX" to cancel at any time.
- Press "SEND"