OSC - Transmission Bench Modes

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

SSA, SSB, SSC, SSD AND TCC IN BENCH MODE: 

The BENCH MODE allows the technician to carry out electrical circuit checks on the following components:

• SSA - Activates SS#1 OFF or ON.
• SSB - Activates SS#2 OFF or ON.
• SSC - Activates SS#3 OFF or ON.
• SSD - Activates SS#4 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.
• 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 scan tool 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."

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 0 to 90 psi and 90 to 0 psi.

The OSC functions for the parameter EPC allows the technician to choose the following options:

• EPC - activates EPC to selected values.
• 00 - sets EPC pressure to 0 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.

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.
• Pressure gauge installed.
• Key ON.
• Engine ON.
• Engine RPM at 1,500.

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 EPC pressure to 0 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.