2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2270
Circuit/System Description
The automatic transmission (AT) input and output speed sensor (ISS and OSS) assembly each are part of a single harness. The OSS is a hall-effect
type sensor. The ISS/OSS mounts to the control valve upper body assembly. The sensor end faces the output shaft housing machined slots. The
sensor receives 8.3-9.3 volts on the ISS/OSS supply voltage circuit from the control solenoid valve assembly. As the output shaft rotates, the sensor
produces a signal frequency based on the machined slots of the output shaft housing. This signal is transmitted through the OSS signal circuit to the
control solenoid valve assembly. The control solenoid valve assembly uses the OSS signal to determine line pressure, transmission shift patterns,
torque converter clutch (TCC) slip speed and gear ratio.
Conditions for Running the DTC
P0722
* DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, or P0722 are not set.
* Ignition voltage is 8.6 volts or greater.
* The engine speed is 500 RPM or greater for 5 seconds.
* The TCM must receive a valid torque signal from the ECM.
* The engine torque is between 50-1,492 Nm (36-1,100 lb ft).
* Accelerator pedal position signal is valid.
* Transmission fluid temperature (TFT) is greater than 0掳C (32掳F).
* The selected range is not PARK or NEUTRAL.
* The transmission input speed is between 653-5350 RPM.
* The throttle position is greater than 5 percent.
P0723
* DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, P0722, P0723, P0973, P0974, P0976, or P0977 are not set.
* Ignition voltage is 8.6 volts or greater.
* The engine speed is 3200 RPM or greater for 5 seconds.
* Greater than 5 seconds since last range change.
* The TCM must receive a valid torque signal from the ECM.
* Accelerator pedal position signal is valid.
Conditions for Setting the DTC
P0722
* The TCM detects no output shaft speed when there is vehicle speed.
* The transmission output speed is 35 RPM or less for 4 seconds.
P0723
* The TCM detects an unrealistic drop in output shaft speed.
* The transmission input speed has not changed by more than 4100 RPM for 2 seconds.
* The transmission output speed has not changed by more than 8200 RPM for 2 seconds.
* The transmission output speed drops 650 RPM and does not recover for 1.5 seconds.
Action Taken When the DTC Sets
P0722
* DTC P0722 is a Type A DTC.
* The transmission defaults to second gear.
* The TCM enables torque management.
* The TCM freezes transmission adaptive functions.
* The TCM turns OFF all solenoids.
* The TCM turns OFF the TCC solenoid.
P0723
* DTC P0723 is a Type A DTC.
* The high side driver is turned OFF.
* The TCM turns OFF all solenoids.
* The TCM freezes transmission adaptive functions.
* The TCM enables torque management.
Conditions for Clearing the DIC/DTC
DTCs P0722 and P0723 are Type A DTCs.
