OSC - Transmission Bench Modes

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

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.