2010 Cadillac CTS Sedan AWD V6-3.0L Page 1622

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1622

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0722

- Output Speed Sensor (OSS) Circuit Low Voltage

DTC P0723

- Output Speed Sensor (OSS) Intermittent

Diagnostic Fault Information

Typical Scan Tool Data

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.