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Home >> Ford >> 2012 >> Fusion AWD V6-3.0L Flex Fuel >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Component Tests and General Diagnostics >> Automatic Transaxle/Transmission - 6F35 >> Output State Control (OSC) Mode

Output State Control (OSC) Mode




Output State Control (OSC) Mode





Description

Output state control allows a diagnostic scan tool direct control of specific transmission components or functions. Output state control allows the technician to control the main functions or components of the transmission to help the technician diagnose the transmission quickly and easily. For example, output state control may be used to change gears or remain in a specific gear. Output state control may be used to control the operation of the TCC (Torque Converter Clutch) to engage or disengage, or to keep the converter clutch from engaging at all. Output state control may be used to help carry out solenoid electrical pinpoint tests by turning a solenoid off or on by controlling the actual current to the VFS (Variable Force Solenoid) solenoid.

Procedure

NOTE: Retrieve Continuous Codes and carry out a KOEO (Key ON Engine OFF) and KOER (Key ON Engine Running) On-Demand Self Test before using any output state control. Any DTCs related to the TR (Transmission Range) sensor, the OSS (Output Shaft Speed) sensor or the TSS (Turbine Shaft Speed) sensor must be fixed or the TCM (Transmission Control Module) will not allow the output state control to operate. Visual Inspection

Output state control is used to test various transmission components and functions when the vehicle is in the service bay or being driven on the road. Specific vehicle conditions are required for output state control to control each specific function or component. The following describes which transmission functions and components output state control may control and the specific vehicle conditions necessary for its operation.

Service Bay - Vehicle State No. 1

Vehicle state No. 1 is functional ONLY when the ignition is in the ON position and the selector lever is in PARK or NEUTRAL with the engine OFF. Vehicle state No. 1 is required when using output state control to carry out electrical pinpoint tests. The following transmission components may be controlled using output state control in vehicle state No. 1.

- SSA_AMP- Controls the current to SSA (Shift Solenoid A) , VFS (Variable Force Solenoid)

- SSB_AMP- Controls the current to SSB (Shift Solenoid B) , VFS (Variable Force Solenoid)

- SSC_AMP- Controls the current to SSC (Shift Solenoid C) , VFS (Variable Force Solenoid)

- SSD_AMP- Controls the current to SSD (Shift Solenoid D) , VFS (Variable Force Solenoid)

- SSE- Directs TCM (Transmission Control Module) to command SSE (Shift Solenoid E) OFF or ON

- LPC_AMP- Controls the current to the LPC (Line Pressure Control) VFS (Variable Force Solenoid)

- TCC_AMP- Controls the current to the TCC (Torque Converter Clutch) VFS (Variable Force Solenoid)

The vehicle requirements must be met when sending an output state control value to control each component such as the solenoids stated above. If the vehicle requirements are not met when sending the output state control value, an error message may appear. When an error message appears, output state control is cancelled and should be restarted.

After sending the output state control value, if the vehicle requirements are no longer met, the error message will not appear but the output state control value will be cancelled by the TCM (Transmission Control Module). Use the scan tool to monitor the PID that corresponds to each output state control function or component to determine if the TCM (Transmission Control Module) is using the output state control value or normal control.

Output state control may be cancelled at any time, to return the TCM (Transmission Control Module) to normal control for a specific output state control function or component. See instructions for specific scan tool.

Service Bay - Vehicle State No. 2

Vehicle state No. 2 is functional ONLY when the engine is running and the selector lever is in PARK or NEUTRAL with engine speed greater than 1,100 rpm. Vehicle state No. 2 is required when using output state control to carry out a line pressure check. Most, but not all, of the solenoids may be controlled during this vehicle state. It is recommended to use vehicle state No. 1 when using output state control to control the solenoids. The following transmission function and components may be controlled using output state control in vehicle state No. 2.

- LINEDSD- Output state control function to command line pressure to a desired pressure

- SSD_AMP- Controls the current to SSD (Shift Solenoid D) , VFS (Variable Force Solenoid)

- SSC_AMP- Controls the current to SSC (Shift Solenoid C) , VFS (Variable Force Solenoid)

- SSB_AMP- Controls the current to SSB (Shift Solenoid B) , VFS (Variable Force Solenoid)

- SSA_AMP- Controls the current to SSA (Shift Solenoid A) , VFS (Variable Force Solenoid)

The vehicle requirements must be met when sending an output state control value to control each component such as the solenoids stated above. If the vehicle requirements are not met when sending the output state control value, an error message may appear. When an error message appears, output state control is cancelled and should be restarted.

After sending the output state control value, if the vehicle requirements are no longer met, the error message will not appear but the output state control value will be cancelled by the TCM (Transmission Control Module). Use the scan tool to monitor the PID that corresponds to each output state control function or component to determine if the TCM (Transmission Control Module) is using the output state control value or normal control.

Output state control may be cancelled at any time, to return the TCM (Transmission Control Module) to normal control for a specific output state control function or component. See instructions for specific scan tool.

Output state control values for SSA_AMP, SSB_AMP, SSC_AMP, SSD_AMP, LPC_AMP and TCC_AMP to control the current on the VFS (Variable Force Solenoid) solenoids are between zero (0) and one (1) amp. The following are examples.

- 0- Commands TCM (Transmission Control Module) to control current to zero amps

- 0.25- Commands TCM (Transmission Control Module) to control current to 1/4 amp or 250 milliamps

- 0.50- Commands TCM (Transmission Control Module) to control current to 1/2 amp or 500 milliamps

- 0.75- Commands TCM (Transmission Control Module) to control current to 3/4 amp or 750 milliamps

- 1- Commands TCM (Transmission Control Module) to control current to 1 amp or 1,000 milliamps

Output state control aids in testing the electronic functions of the TCM (Transmission Control Module) , VFS (Variable Force Solenoid) solenoid and associated circuitry. Output state control allows the technician to control the TCM (Transmission Control Module) commanded current of the VFS (Variable Force Solenoid) solenoids and the commanded state of the on/off solenoid. This allows the technician to accurately test the electronic circuitry by comparing the commanded current with the actual current or the on/off state with the actual voltage. Shifting the transmission through the various gears tests the mechanical operation of the VFS (Variable Force Solenoid) solenoids. When using output state control to control the VFS (Variable Force Solenoid) current, the technician may measure the circuit current using an inductive pickup or measure the circuit voltage drop to help verify the proper electrical operation of each VFS (Variable Force Solenoid) solenoid.

The output state control values for LINEDSD to command a desired line pressure are between 414 kPa (60 psi) and 1,931 kPa (280 psi). The following are examples.

- 60 psi- Commands TCM (Transmission Control Module) to control line pressure to 414 kPa (60 psi)

- 100 psi- Commands TCM (Transmission Control Module) to control line pressure to 689 kPa (100 psi)

- 150 psi- Commands TCM (Transmission Control Module) to control line pressure to 965 kPa (150 psi)

- 200 psi- Commands TCM (Transmission Control Module) to control line pressure to 1,517 kPa (200 psi)

NOTICE: Do NOT command line pressure LOWER then 414 kPa (60 psi) or HIGHER then 1,931 kPa (280 psi) or damage to the transmission can occur.

Output state control allows the technician to control the TCM (Transmission Control Module) commanded line pressure. This allows the technician to accurately test the electronic pressure control system by comparing the output state control commanded line pressure to the actual line pressure indicated on the pressure gauge. The pressure gauge should be connected to the line pressure tap on the transmission. The PID corresponding to the commanded line pressure must be monitored to make sure the TCM (Transmission Control Module) is using the output state control value for the commanded line pressure. This test will help verify the correct operation of the transmission pump assembly, pump regulator valve and the operation of the LPC (Line Pressure Control) solenoid.

Drive Test

Output state control allows control of 3 transmission functions while driving on the road. Each transmission function has a unique set of vehicle operating requirements that the technician is required to meet before the TCM (Transmission Control Module) will allow output state control.

- TCC_OSC- Commands the TCM (Transmission Control Module) to engage or disengage the TCC (Torque Converter Clutch)

- GEAR_OSC- Commands the TCM (Transmission Control Module) to change gears (upshift or down-shift) or remain in a gear

- HRSH_SFT- Commands a slightly higher hydraulic pressure during engagements and upshifts

The vehicle requirements must be met when sending an output state control value to control the specific functions stated above. If the vehicle requirements are not met when sending the output state control value, an error message may appear. When an error message appears, output state control is cancelled and should be restarted.

After sending the output state control value, if the vehicle requirements are no longer met, the error message will not appear but the output state control value is cancelled by the TCM (Transmission Control Module). Use the scan tool to monitor the PID that corresponds to each output state control function or component to determine if the TCM (Transmission Control Module) is using the output state control value or normal control.

Output state control may be cancelled at any time, to return the TCM (Transmission Control Module) to normal control for a specific output state control function or component. See instructions for specific scan tool.

Drive Test - Torque Converter Clutch Control

The output state control values for TCC_OSC to engage or disengage the TCC (Torque Converter Clutch) are as follows:

- 0- TCM (Transmission Control Module) in normal control of TCC (Torque Converter Clutch) and output state control is cancelled

- 1 or OFF- Commands TCM (Transmission Control Module) to keep the torque converter clutch from engaging

- 2 or ON- Commands TCM (Transmission Control Module) to engage the TCC (Torque Converter Clutch) using a normal ramp rate

- 3 or ON- Commands TCM (Transmission Control Module) to engage the TCC (Torque Converter Clutch) using a fast ramp rate

Controlling the TCC (Torque Converter Clutch) will assist the technician in testing the operation of the torque converter for engagements and disengagements. Also, the technician may find it easier to evaluate upshifts and downshifts by first using output state control to keep the TCC (Torque Converter Clutch) from engaging.

Vehicle requirements when using TCC_OSC - Controlling the TCC (Torque Converter Clutch).

When SENDING the TCC_OSC value [1 or OFF], the engine must be running with the transmission in the DRIVE position and the vehicle speed must be greater than 5 km/h (3 mph).

When SENDING the TCC_OSC value [2 or 3 or ON], the engine must be running with the selector lever in the DRIVE position, transmission in 3rd, 4th, 5th or 6th gear, transmission temperature between 4°C (40°F) and 121°C (250°F), the vehicle speed must be below 24 km/h (15 mph) and engine speed greater than 1,100 rpm with minimal engine load.

Drive Test - Upshift and Downshift Control

NOTE: Once output state control has successfully commanded the transmission to shift to the desired output state control gear, the transmission will remain in that gear until output state control commands a different gear or the vehicle conditions are no longer correct.

The output state control values for GEAR_OSC to control the transmission gear changes are as follows:

- 0- TCM (Transmission Control Module) in normal shift control and output state control is cancelled

- 1- Commands TCM (Transmission Control Module) to shift to 1st gear- no engine braking

- 2- Commands TCM (Transmission Control Module) to shift to 2nd gear- with engine braking

- 3- Commands TCM (Transmission Control Module) to shift to 3rd gear- with engine braking

- 4- Commands TCM (Transmission Control Module) to shift to 4th gear- with engine braking

- 5- Commands TCM (Transmission Control Module) to shift to 5th gear- with engine braking

- 6- Commands TCM (Transmission Control Module) to shift to 6th gear- with engine braking

Controlling the gear changes will assist the technician in testing the various clutches and whether the transmission is slipping in any particular gear. Output state control will command the TCM (Transmission Control Module) to upshift or downshift depending on the output state control gear value the technician selects. The transmission will remain in the output state control gear selected until another output state control gear value is sent or until output state control is cancelled and/or the vehicle conditions for using output state control are no longer met.

Vehicle requirements when using GEAR_OSC - Controlling Gear Changes

When SENDING a GEAR_OSC value, the engine must be running with the selector lever in the DRIVE position, and the vehicle speed must be greater than 5 km/h (3 mph).

Additional vehicle conditions required for upshifts:

- Vehicle speed must be greater then 32 km/h (20 mph) when commanding an upshift to 5th or 6th gear

Additional vehicle conditions required for downshifts:

- Vehicle speed must be less then 32 km/h (20 mph) when commanding a downshift to 1st gear

- Vehicle speed must be less then 64 km/h (40 mph) when commanding a downshift to 2nd gear

- Vehicle speed must be less then 97 km/h (60 mph) when commanding a downshift to 3rd gear

- Vehicle speed must be less then 129 km/h (80 mph) when commanding a downshift to 4th gear

- Vehicle speed must be less then 161 km/h (100 mph) when commanding a downshift to 5th gear

Drive Test - Pressure Added for Engagements and Upshifts

The output state control values for HRSH_SHFT to command a slight or moderate increase in hydraulic pressure to test for harsh engagements and upshifts are as follows:

- 0 or OFF- TCM (Transmission Control Module) in normal pressure control for shifts and engagements and output state control is cancelled

- 1 or ON- Commands TCM (Transmission Control Module) to moderately increase hydraulic pressure during engagements and upshifts

Setting HRSH_SFT to 1 or ON allows the technician to moderately increase the pressure when performing engagements such as P-R, P-D, N-R, N-D, R-D and when performing automatic upshifts. This can provide additional diagnostic information to help the technician determine whether the electronic pressure control system is providing at least limited control (a normal shift would become harsh). Using output state control to control HRSH_SHFT [1 or ON] should make a softer engagement or shift more normal and an already normal shift or engagement harsher by slightly increasing the pressure. This test should only be used to provide additional diagnostic information and should not be the only scan tool or test to determine a faulty electronic or hydraulic component.

Using Output State Control and Monitoring PIDs

To confirm that the output state control value was sent by the scan tool and the TCM (Transmission Control Module) has accepted the output state control command, a corresponding PID for each output state control parameter must be monitored. After SENDING the output state control value, the corresponding PID value should be the same as the output state control value that was sent. Additional PIDs are listed that may be monitored to help the technician accurately diagnose the transmission.

The following is a list of output state control parameters and their corresponding PIDs:





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