Scan Tool Output Control
| Additional Menu Selection(s)
| Description
|
1 - 2 Solenoid
| --
|
| • | The Transmission Control Module (TCM) commands the 1-2 shift
solenoid valve ON and OFF. The scan tool 1-2 Solenoid. 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. |
| • | 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 TCM. |
| • | 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. For example, 3rd gear is not allowed if the transmission range is D1. 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 TCM. |
|
2 - 3 Solenoid
| --
|
| • | The TCM commands the 2-3 shift solenoid valve ON and OFF. The scan
tool 2-3 Solenoid. 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. |
| • | 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 TCM. |
| • | 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. 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 TCM. |
|
4 - 5 Solenoid
| --
|
| • | The TCM commands the 4-5 shift solenoid valve ON and OFF. The scan
tool 4-5 Solenoid. 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. |
| • | 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 TCM. |
| • | 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. 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 TCM. |
|
Reset Transmission Adapts
| --
|
| • | The TCM clears, or resets, all Transmission Adapt Parameter (TAP)
cells to zero. |
| • | There are no limits to using this control. It may be performed with the
engine running or when the ignition is ON, and the engine is OFF. |
|
Reset Transmission Oil Life
| --
|
| • | The TCM resets the amount of oil life remaining to 100 percent. |
| • | 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 TCM commands the amperage 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 0.10-1.10 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 TCM. The TCM 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 TCM, the message "Requested current for
the PC Solenoid is too high" appears on the scan tool display. |
| - | Transmission Internal Mode Switch (IMS) DTCs must not be active. If a
transmission IMS 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 TCM 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 TCM 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 TCM 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 TCM 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 TCM does not allow an upshift that is greater than the current selected
transmission range. 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 TCM commands the duty cycle of the TCC PWM solenoid. The duty
cycle is represented by a percentage of ON, energised, time. Approximately 90-100
percent duty cycle represents an ON, energised, commanded state. Zero percent represents
an OFF, non-energised, 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 TCM. |
| • | When the engine is running, the following control limits apply: |
| - | If the transmission range is Park, and the transmission is in hot mode,
the TCC control solenoid may not be commanded OFF. If the solenoid is requested OFF,
the message "TCC OFF command disabled in Hot Mode" appears on the scan
tool display. |
| - | The TCC control solenoid may not be commanded OFF for more than a calibrated
amount of time. If the solenoid is commanded OFF, for a certain amount of time, the
message "TCC OFF time has been exceeded" appears on the scan tool display. |
|
High Side Driver 1
| |
| • | The TCM commands the driver for the solenoid voltage supply ON and OFF. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. |
| • | High side driver 1 may not be commanded ON and OFF with the scan
tool if the engine is running. |
|
High Side Driver 2
| --
|
| • | The TCM commands the driver for the solenoid voltage supply ON and OFF. |
| • | When the ignition is ON, and the engine is OFF, there are no limits to
this control. |
| • | High side driver 2 may not be commanded ON and OFF with the scan
tool if the engine is running. |
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