OSC-Transmission Bench Modes

The following Transmission Bench Modes may be used as necessary during diagnostics.

SSA, SSB, SSC, SSD and TCC in BENCH MODE

CAUTION: The parking brake must be set prior to carrying out this procedure.

The BENCH MODE allows the technician to carry out electrical circuit checks on the following components:
- SSA - Activates SS#A OFF or ON.
- SSB - Activates SS#B OFF or ON.
- SSC - Activates SS#C OFF or ON.
- SSD - Activates SS#D OFF or ON.
- TCC - Activates TCC OFF or ON.
OSC "SSA, SSB, SSC, SSD, 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 or N.
- 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, SSC, SSD, 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, SSC, SSD, 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."

PCA, PCB, PCC in BENCH MODE

CAUTION: The parking brake must be set prior to carrying out this procedure.

The BENCH MODE is also used to test the functionality of the transmission electronic pressure control. During BENCH MODE, the PCx solenoids can be commanded in increments of 15 psi from zero to 90 psi and 90 to zero psi.
The line pressure tap is used to verify output pressure from PC "A" or PC "B" by turning either one off while verifying the output from the other solenoid. The second pressure tap is used to verify the output from the PC C solenoid.
The OSC functions for the parameter PCx allows the technician to choose the following options:
- PCx - Activates PCx to selected values.
- [00] - sets PCx pressure to 00 psi.
- [15] - sets PCx pressure to 15 psi.
- [30] - sets PCx pressure to 30 psi.
- [45] - sets PCx pressure to 45 psi.
- [60] - sets PCx pressure to 60 psi.
- [75] - sets PCx pressure to 75 psi.
- [90] - sets PCx pressure to 90 psi.
OSC "EPC" Bench Mode should ONLY be operated to check PRESSURE FUNCTIONALITY using an installed pressure gauge (300 psi) when:
- VSS and digital TR sensor are operational.
- No VSS and digital TR sensor DTCs.
- Transmission range selector lever in P or N.
- Pressure gauge installed.
- Key ON.
- Engine ON.
- Engine rpm at least 1500.
OSC "EPC" Bench Mode should ONLY be operated to complete EPC SOLENOID CIRCUIT PINPOINT TESTS when:
- VSS and Digital TR Sensor are operational.
- No VSS and Digital TR Sensor DTCs are present.
- Transmission range selector lever is in "P" or "N".
- Key "ON".
- Engine "OFF". OSC Command Values
- [00] - sets PCx pressure to 00 psi.
- [15] - sets PCx pressure to 15 psi.
- [30] - sets PCx pressure to 30 psi.
- [45] - sets PCx pressure to 45 psi.
- [60] - sets PCx pressure to 60 psi.
- [75] - sets PCx pressure to 75 psi.
- [90] - sets PCx pressure to 90 psi.
- [XXX] - cancels OSC value sent.
- [SEND] - sends the values to PCM.

BENCH MODE Procedure for PCx
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 - PCx."
- Select Value "0 - 90 psi."
- Press "SEND" to send command.
- Select "XXX" to cancel at any time.
- Press "SEND."