Scan Tool Output Control
| Additional Menu Selections
| Description
|
1-2 Solenoid
| --
|
| • | The PCM commands the 1-2 shift solenoid valve ON and OFF. The scan
tool 1-2 Sol. parameter should match the commanded state. The scan tool Commanded
Gear parameter should correspond with the shift solenoid combination. Refer to
Shift Solenoid Valve State and Gear Ratio
table. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | Only sequential gear changes are allowed. For example, 1st to 3rd is not
allowed. If a non-sequential gear change is attempted, the message "Non-sequential
gear changes not allowed. Gear changes must be in order" appears on the scan
tool display. |
| - | The vehicle speed must be below a calibrated value. If the vehicle speed
is too high, the message "Vehicle speed too high" appears on the scan
tool display. |
| - | The engine speed must be below a calibrated value. If the engine speed
is too high, the message "Engine speed too high" appears on the scan tool
display. |
| - | Downshifts are allowed only when the vehicle speed is below a calibrated
value. If the vehicle speed is too high, the message "Eng. is on and veh. speed
too hi for 3-2 or 2-1 downshift" appears on the scan tool display. |
| - | The gear requested may not be greater than the current selected transmission
range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2.
If the gear requested is greater than the current selected transmission range, the
message "Eng. running and gear request is greater than the current TR"
appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
2-3 Solenoid
| --
|
| • | The PCM commands the 2-3 shift solenoid valve ON and OFF. The scan
tool 2-3 Sol. parameter should match the commanded state. The scan tool Commanded
Gear parameter should correspond with the shift solenoid combination. Refer to
Shift Solenoid Valve State and Gear Ratio
table. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid will remain ON until commanded OFF, and vice versa. When
the output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | Only sequential gear changes are allowed. For example, 1st to 3rd is not
allowed. If a non-sequential gear change is attempted, the message "Non-sequential
gear changes not allowed. Gear changes must be in order" appears on the scan
tool display. |
| - | The vehicle speed must be below a calibrated value. If the vehicle speed
is too high, the message "Vehicle speed too high" appears on the scan
tool display. |
| - | The engine speed must be below a calibrated value. If the engine speed
is too high, the message "Engine speed too high" appears on the scan tool
display. |
| - | Downshifts are allowed only when the vehicle speed is below a calibrated
value. If the vehicle speed is too high, the message "Eng. is on and veh. speed
too hi for 3-2 or 2-1 downshift" appears on the scan tool display. |
| - | The gear requested may not be greater than the current selected transmission
range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2.
If the gear requested is greater than the current selected transmission range, the
message "Eng. running and gear request is greater than the current TR"
appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
3-2 Downshift Solenoid
| --
|
| • | The PCM commands the 3-2 shift solenoid valve ON and OFF. The scan
tool 3-2 Downshift Sol. parameter should match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | The transmission range (PRNDL) must be in Park or Neutral. If the transmission
range is not in Park or Neutral, the message "Engine running and transmission
range is not Park/Neutral" appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
Auxiliary Trans Pump Relay
| --
|
| • | The HCM commands the auxiliary trans pump ON and OFF. The scan tool Auxiliary
Trans Pump Relay parameter should match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The relay remains ON until commanded OFF, and vice versa. When the output
control is exited the relay state is determined by the HCM. |
|
Clear TAPS (Transmission Adaptive Pressures)
| --
|
| • | The PCM clears, or resets, the TAP cells to the original base value. |
| • | There are no limits to using this output control. It may be performed
with the engine running or when the ignition is ON, and the engine is OFF. |
|
PC Solenoid
| --
|
| • | The PCM commands the amperage, current, to the pressure control solenoid
in order to control transmission line pressure. As the amperage increases, the line
pressure decreases. As the amperage decreases, the line pressure increases. The amperage
range is 0.00-1.10 and may be commanded in one-tenth amp increments. |
| • | When the ignition is ON, and the engine is OFF, the reference, commanded,
amperage may be controlled within calibrated limits. The scan tool parameter "PC
Sol. Ref. Current" changes but the parameter "PC Sol. Actual Current"
does not change. The reference current remains until commanded otherwise. |
| • | When the engine is running, the following control limits apply: |
| - | When the transmission range is Park or Neutral, the reference, commanded,
amperage may be controlled within calibrated limits. The engine speed must be less
than 1,500 RPM. If the engine speed is greater than 1,500 RPM, the message "TR
in park/neutral and engine speed over 1,500 RPM" appears on the scan
tool display. Both the scan tool parameters "PC Sol. Ref. Current" and "PC
Sol. Actual Current" change. Both current readings remain until commanded otherwise. |
| - | When the transmission range is not in Park or Neutral, the reference amperage
can only be controlled less than the current determined by the PCM. The PCM does not
allow a value to be selected that may cause damage to the transmission. If the requested
amperage is more than allowed by the PCM, the message "Requested current for
the PC Solenoid is too high" appears on the scan tool display. |
| - | Transmission range DTCs must not be active. If a transmission range DTC
is active, the message "Engine running with transmission DTC present"
appears on the scan tool display. |
|
Shift Transmission
| --
|
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The scan tool shift solenoid states change to match the Commanded Gear
selected. |
| • | When the engine is running, the following control limits apply: |
| - | The PCM does not allow a shift if it causes the engine RPM to exceed a
calibrated limit. If a gear is requested and the engine speed is too high, the message "Engine
speed too high" appears on the scan tool display. |
| - | The PCM does not allow a 3-2 or 2-1 downshift if the vehicle
speed exceeds a calibrated limit. If either downshift is requested and the vehicle
speed is too high, the message "Eng. is on and veh. speed too hi for 3-2
or 2-1 downshift" appears on the scan tool display. |
| - | The PCM does not allow a 4-3 downshift if the vehicle speed exceeds
a calibrated limit. If a 4-3 downshift is requested and the vehicle speed is
too high, the message "Vehicle speed too high" appears on the scan tool
display. |
| - | The PCM does not allow an upshift if the vehicle speed exceeds a calibrated
limit. If an upshift is requested and the vehicle speed is too high, the message "Vehicle
speed too high" appears on the scan tool display. |
| - | The PCM does not allow an upshift that is greater than the current selected
transmission range (PRNDL). For example 3rd gear is not allowed if the transmission
range is D2. If an upshift is requested that is greater than the current selected
transmission range, the message "Eng. running and gear request is greater than
the current TR" appears on the scan tool display. |
|
TCC Control Solenoid
| --
|
| • | The PCM commands the duty cycle of the TCC PWM solenoid. The duty
cycle is represented by a percentage of ON, energized, time. Approximately 90-100
percent duty cycle represents an ON, energized, commanded state. Zero percent represents
an OFF, non-energized, commanded state. The scan tool TCC Duty Cycle parameter should
match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON, 90-100 percent duty cycle, until commanded
OFF, zero percent duty cycle, and vice versa. When the output control is exited, the
solenoid duty cycle is determined by the PCM. |
|
TCC Enable
| --
|
| • | The PCM commands the TCC enable solenoid valve ON and OFF. The scan tool
TCC Enable parameter should match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
Scan Tool Output Control
| Additional Menu Selections
| Description
|
1-2 Solenoid
| --
|
| • | The PCM commands the 1-2 shift solenoid valve ON and OFF. The scan
tool 1-2 Sol. parameter should match the commanded state. The scan tool Commanded
Gear parameter should correspond with the shift solenoid combination. Refer to
Shift Solenoid Valve State and Gear Ratio
table. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | Only sequential gear changes are allowed. For example, 1st to 3rd is not
allowed. If a non-sequential gear change is attempted, the message "Non-sequential
gear changes not allowed. Gear changes must be in order" appears on the scan
tool display. |
| - | The vehicle speed must be below a calibrated value. If the vehicle speed
is too high, the message "Vehicle speed too high" appears on the scan
tool display. |
| - | The engine speed must be below a calibrated value. If the engine speed
is too high, the message "Engine speed too high" appears on the scan tool
display. |
| - | Downshifts are allowed only when the vehicle speed is below a calibrated
value. If the vehicle speed is too high, the message "Eng. is on and veh. speed
too hi for 3-2 or 2-1 downshift" appears on the scan tool display. |
| - | The gear requested may not be greater than the current selected transmission
range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2.
If the gear requested is greater than the current selected transmission range, the
message "Eng. running and gear request is greater than the current TR"
appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
2-3 Solenoid
| --
|
| • | The PCM commands the 2-3 shift solenoid valve ON and OFF. The scan
tool 2-3 Sol. parameter should match the commanded state. The scan tool Commanded
Gear parameter should correspond with the shift solenoid combination. Refer to
Shift Solenoid Valve State and Gear Ratio
table. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid will remain ON until commanded OFF, and vice versa. When
the output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | Only sequential gear changes are allowed. For example, 1st to 3rd is not
allowed. If a non-sequential gear change is attempted, the message "Non-sequential
gear changes not allowed. Gear changes must be in order" appears on the scan
tool display. |
| - | The vehicle speed must be below a calibrated value. If the vehicle speed
is too high, the message "Vehicle speed too high" appears on the scan
tool display. |
| - | The engine speed must be below a calibrated value. If the engine speed
is too high, the message "Engine speed too high" appears on the scan tool
display. |
| - | Downshifts are allowed only when the vehicle speed is below a calibrated
value. If the vehicle speed is too high, the message "Eng. is on and veh. speed
too hi for 3-2 or 2-1 downshift" appears on the scan tool display. |
| - | The gear requested may not be greater than the current selected transmission
range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2.
If the gear requested is greater than the current selected transmission range, the
message "Eng. running and gear request is greater than the current TR"
appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
3-2 Downshift Solenoid
| --
|
| • | The PCM commands the 3-2 shift solenoid valve ON and OFF. The scan
tool 3-2 Downshift Sol. parameter should match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
| • | When the engine is running, the following control limits apply: |
| - | The transmission range (PRNDL) must be in Park or Neutral. If the transmission
range is not in Park or Neutral, the message "Engine running and transmission
range is not Park/Neutral" appears on the scan tool display. |
| - | The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
Clear TAPS (Transmission Adaptive Pressures)
| --
|
| • | The PCM clears, or resets, the TAP cells to the original base value. |
| • | There are no limits to using this output control. It may be performed
with the engine running or when the ignition is ON, and the engine is OFF. |
|
PC Solenoid
| --
|
| • | The PCM commands the amperage, current, to the pressure control solenoid
in order to control transmission line pressure. As the amperage increases, the line
pressure decreases. As the amperage decreases, the line pressure increases. The amperage
range is 0.00-1.10 and may be commanded in one-tenth amp increments. |
| • | When the ignition is ON, and the engine is OFF, the reference, commanded,
amperage may be controlled within calibrated limits. The scan tool parameter "PC
Sol. Ref. Current" changes but the parameter "PC Sol. Actual Current"
does not change. The reference current remains until commanded otherwise. |
| • | When the engine is running, the following control limits apply: |
| - | When the transmission range is Park or Neutral, the reference, commanded,
amperage may be controlled within calibrated limits. The engine speed must be less
than 1,500 RPM. If the engine speed is greater than 1,500 RPM, the message "TR
in park/neutral and engine speed over 1,500 RPM" appears on the scan
tool display. Both the scan tool parameters "PC Sol. Ref. Current" and "PC
Sol. Actual Current" change. Both current readings remain until commanded otherwise. |
| - | When the transmission range is not in Park or Neutral, the reference amperage
can only be controlled less than the current determined by the PCM. The PCM does not
allow a value to be selected that may cause damage to the transmission. If the requested
amperage is more than allowed by the PCM, the message "Requested current for
the PC Solenoid is too high" appears on the scan tool display. |
| - | Transmission range DTCs must not be active. If a transmission range DTC
is active, the message "Engine running with transmission DTC present"
appears on the scan tool display. |
|
Shift Transmission
| --
|
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The scan tool shift solenoid states change to match the Commanded Gear
selected. |
| • | When the engine is running, the following control limits apply: |
| - | The PCM does not allow a shift if it causes the engine RPM to exceed a
calibrated limit. If a gear is requested and the engine speed is too high, the message "Engine
speed too high" appears on the scan tool display. |
| - | The PCM does not allow a 3-2 or 2-1 downshift if the vehicle
speed exceeds a calibrated limit. If either downshift is requested and the vehicle
speed is too high, the message "Eng. is on and veh. speed too hi for 3-2
or 2-1 downshift" appears on the scan tool display. |
| - | The PCM does not allow a 4-3 downshift if the vehicle speed exceeds
a calibrated limit. If a 4-3 downshift is requested and the vehicle speed is
too high, the message "Vehicle speed too high" appears on the scan tool
display. |
| - | The PCM does not allow an upshift if the vehicle speed exceeds a calibrated
limit. If an upshift is requested and the vehicle speed is too high, the message "Vehicle
speed too high" appears on the scan tool display. |
| - | The PCM does not allow an upshift that is greater than the current selected
transmission range (PRNDL). For example 3rd gear is not allowed if the transmission
range is D2. If an upshift is requested that is greater than the current selected
transmission range, the message "Eng. running and gear request is greater than
the current TR" appears on the scan tool display. |
|
TCC Control Solenoid
| --
|
| • | The PCM commands the duty cycle of the TCC PWM solenoid. The duty
cycle is represented by a percentage of ON, energized, time. Approximately 90-100
percent duty cycle represents an ON, energized, commanded state. Zero percent represents
an OFF, non-energized, commanded state. The scan tool TCC Duty Cycle parameter should
match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON, 90-100 percent duty cycle, until commanded
OFF, zero percent duty cycle, and vice versa. When the output control is exited, the
solenoid duty cycle is determined by the PCM. |
|
TCC Enable
| --
|
| • | The PCM commands the TCC enable solenoid valve ON and OFF. The scan tool
TCC Enable parameter should match the commanded state. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. The solenoid remains ON until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is determined by the PCM. |
|
