2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2653
DTC P0756
- Shift Solenoid (SS) 2 Valve Performance - Stuck Off
Circuit/System Description
The shift solenoid (SS) 2 is part of the control solenoid valve assembly which has no serviceable parts. The control solenoid valve assembly is
attached to the lower control valve body. The solenoid operates by the TCM opening or closing the ground circuit. With the solenoid circuit
grounded (solenoid on), the internal plunger and metering ball block the exhaust fluid creating signal fluid pressure. The signal fluid acts against
the clutch select valve 3 to overcome the valve spring force moving it to the apply position, allowing the shift. The TCM shifts the transmission by
operating the solenoids in on/off combinations.
Conditions for Running the DTC
* DTCs P0121, P0122, P0123, P0716, P0717, P0722, P0723, or P182E are not set.
* Ignition voltage is 8.6 volts or greater.
* The engine speed is greater than 500 RPM.
* The engine run time is greater than 5 seconds.
* High Side Driver (HSD) 1 is enabled.
* Accelerator pedal position signal is valid
* The TCM must receive a valid torque signal from the ECM.
* Throttle position is 0.5 percent or greater.
* Transmission fluid temperature (TFT) is 0掳C (32掳F) or greater.
Conditions for Setting the DTC
* Commanded gear is 1st locked.
* Transmission gearbox slip is 200 RPM for 10 seconds.
* Transmission forces 2nd gear.
* Transmission has obtained a valid 2nd for 3 seconds.
Action Taken When the DTC Sets
* DTC P0756 is a Type A DTC.
* The TCM inhibits TAP function.
* The TCM inhibits TCC.
* The TCM freezes transmission adaptive functions.
* The TCM commands high line pressure.
* The transmission defaults to Park, Reverse, Neutral, or 2nd gear.
Conditions for Clearing the DTC
DTC P0756 is a Type A DTC.
Diagnostic Aids
Before performing a road test, configure and setup the scan tool for snapshot mode. This will allow you to display, monitor, and verify multiple
transmission data parameters at one time, after the road test.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Description and Operation
* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)
* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)
* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)
* Park - Engine Running (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Park - Engine Running)
* Reverse (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6L45/6L50/6L80/6L90 -
Automatic Transmission/Reverse)
* Neutral - Engine Running (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Neutral - Engine Running)
* Drive Range, First Gear Engine Braking (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Drive Range/First Gear Engine Braking)
* Drive Range, First Gear (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
