OSC-Transaxle Bench Modes

OSC-Transaxle Bench Modes
The following Transaxle Bench Modes may be used or necessary during diagnostics.

SSA, SSB in BENCH MODE
The BENCH MODE allows the technician to carry out electrical circuit checks on the following components:
- SSA - Activates SSA OFF or ON.
- SSB - Activates SSB OFF or ON.
OSC "SSA/B" BENCH MODE operates ONLY when:
- VSS and TR sensor are operational.
- No VSS and TR sensor DTCs.
- Transaxle range selector level in P.
- Key ON.
- Engine OFF.
OSC Command Values:
- [OFF] - turns solenoid OFF.
- [ON] - turns solenoid ON.
- |XXX| - cancels OSC sent value.
- [SEND] - sends the values to PCM.
BENCH MODE Procedure for SSA, SSB:
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 (= SST, SS2)."
- Select "ON" to turn solenoid ON.
- Press "SEND" to send command.
- Select "OFF" to turn solenoid OFF.
- Press "SEND" to send command.
- Select "XXX" to cancel at any time.
- Press "SEND."

SSC, SSD and SSE in BENCH MODE
The BENCH MODE is also used to test the functionality of pulse width modulated solenoids of the transaxle. During BENCH MODE, the SSC/D/E solenoids can ramp in increments of 25% from 0% to 100% duty cycle and 100% to 0% duty cycle.
The OSC functions for the parameters SSC/D/E allow the technician to choose the following options:
- SSC - Activates SSC to selected values.
- SSD - Activates SSD to selected values.
- SSE - Activates SSE to selected values.
- [00] - sets SSC/D/E duty cycle to 00%
- [25] - sets SSC/D/E duty cycle to 25%
- [50] - sets SSC/D/E duty cycle to 50%
- [75] - sets SSC/D/E duty cycle to 75%
- [100] - sets SSC/D/E duty cycle to 100%
OSC "SSC/D/E" BENCH MODE operates ONLY when:
- VSS and TR sensor are operational.
- No VSS and TR sensor DTCs.
- Transaxle range selector level in P.
- Key ON.
- Engine ON.
- Engine speed at least 1500 RPM.
- Pressure gauge installed (optional).
OSC Command Values:
- [00] - sets SSC/D/E duty cycle to 00%
- [25 j - sets SSC/D/E duty cycle to 25o
- [50] - sets SSC/D/E duty cycle to 50%
- [75] - sets SSC/D/E duty cycle to 75%
- [100] - sets SSC/D/E duty cycle to 100%
- [XXX] - cancels OSC value sent.
- [SEND] - sends the values to PCM.
BENCH MODE Procedure for SSC, SSD and SSE
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 - SSC, SSD, SSE."
- Select Value "0-100%."
- Press "SEND" to send command.
- Select "XXX" to cancel at any time.
- Press "SEND" to send command.

PCA in BENCH MODE

NOTE: PCA, EPC and VFS all refer to the solenoids.

PCA is preferred for this transmission because the scan tool display PCA.
The BENCH MODE is also used to test the functionality of the transaxle electronic pressure control.
During BENCH MODE, the PCA solenoid can ramp in increments of 20 PSI from 50 PSI to 150 PSI and 150 PSI to 50 PSI.

NOTE: PCA pressure represents transaxle line pressure. The technician should measure PCA pressure using the line pressure tap.

The OSC function for the parameter PCA allows the technician to choose the following options:
- EPC - Activates PCA to selected values.
- [50] - sets PCA pressure to 50 PSI.
- [70] - sets PCA pressure to 70 PSI.
- [90] - sets PCA pressure to 90 PSI.
- [110] - sets PCA pressure to 110 PSI.
- [130] - sets PCA pressure to 130 PSI.
- [150] - sets PCA pressure to 150 PSI.
OCS "PCA" BENCH MODE should ONLY be operated to check PRESSURE FUNCTIONALITY using an installed pressure gauge when:
- VSS and digital TR sensor are operational.
- No VSS and digital TR sensor are operational.
- Key ON.
- Engine ON.
- Engine speed at least 1500 RPM.

OSC "PCA" BENCH MODE should ONLY be operated to compete PCA SOLENOID CIRCUIT PINPOINT TESTS when:
- VSS and digital TR sensor are operational.
- No VSS and digital TR sensor DTC's.
- Transmission range selector lever in P.
- Key ON.
- Engine ON.
OSC Command Values:
- [50] - sets PCA pressure to 50 PSI.
- [70] - sets PCA pressure to 70 PSI.
- [90] - sets PCA pressure to 90 PSI.
- [110] - sets PCA pressure to 110 PSI.
- [130] - sets PCA pressure to 130 PSI.
- [150] - sets PCA pressure to 150 PSI.
- [XXX] - cancels OSC sent value.
- [send] - sends the values to PCM.

BENCH MODE Procedure for PCA:
Follow operating instructions front 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 - PCA."
- Select Value "50 - 150 PSI."
- Press "SEND" to send command.
- Select "XXX" to cancel at any time.
- Press "SEND" to send the command.