2010 Cadillac CTS Sedan AWD V6-3.6L Page 763
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for Scan Tool Information
Special Tools
J-46079 Tire Pressure Monitor Diagnostic Tool
Circuit/System Verification
1. Using the J-46079 , activate each tire pressure sensor and record each sensors transmission data and physical location. Verify J-46079
displays the 8-digit ID number, accurate tire pressure +/- 27.6 kPa (4 psi), Learn Mode, and at least a 1/4 graph signal strength displayed.
瀚慖f any of the parameters listed above are not displayed, replace the suspect tire pressure sensor.
2. With the scan tool, verify tire pressure sensors ID and locations displayed on the scan tool match the IDs and locations recorded from the
special tool.
瀚慖f the IDs and locations do not match, perform the Tire Pressure Indicator Sensor Learn (With UH3) (See: Instrument Panel, Gauges and
Warning Indicators/Tire Monitoring System/Tire Pressure Sensor/Testing and Inspection/Tire Pressure Indicator Sensor Learn (With
UH3))Tire Pressure Indicator Sensor Learn (Without UH3) (See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring
System/Tire Pressure Sensor/Testing and Inspection/Tire Pressure Indicator Sensor Learn (Without UH3)).
3. Enable the TPM learn mode. Use the J-46079 in simulate mode to learn 4 simulated sensor transmissions into the RCDLR. Verify that all 4
simulated sensor locations, IDs, and tire pressures displayed on the TPM special tool match the corresponding scan tool parameters
displayed.
瀚慖f the scan tool does not match, replace the RCDLR.
4. Test drive the vehicle above 40 km/h (25 mph) for greater than 2 minutes. With the scan tool, observe the suspect Pressure Sensor Mode data
parameter. Verify the sensor mode changes to Rolling.
瀚慖f the Pressure Sensor Mode does not change, replace the suspect tire pressure sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Tire Pressure Indicator Sensor Replacement (See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure
Sensor/Service and Repair)
* Tire Pressure Indicator Sensor Learn (With UH3) (See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire
Pressure Sensor/Testing and Inspection/Tire Pressure Indicator Sensor Learn (With UH3))Tire Pressure Indicator Sensor Learn (Without
UH3) (See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure Sensor/Testing and Inspection/Tire
Pressure Indicator Sensor Learn (Without UH3))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for RCDLR replacement, setup, and programming
C0775
DTC C0775
Diagnostic Instructions
* 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 Descriptor
DTC C0775
- Low Tire Pressure System Sensors Not Learned
Circuit/System Description
If the tire pressure sensor learn procedure has not been performed, the tire pressure monitor indicator icon on the instrument panel cluster (IPC) will
flash for 1 minute and then remain illuminated after the ignition switch is cycled ON and the IPC bulb check is complete. If equipped, the driver
information center (DIC) will also display a service tire monitor type message. Under these circumstances, DTC C0775 will be set and the tire
