2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1008

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1008

* 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 C0750 00

- Left Front Low Tire Pressure Sensor

DTC C0750 08

- Left Front Low Tire Pressure Sensor Signal Invalid

DTC C0755 00

- Right Front Low Tire Pressure Sensor

DTC C0755 08

- Right Front Low Tire Pressure Sensor Signal Invalid

DTC C0760 00

- Left Rear Low Tire Pressure Sensor

DTC C0760 08

- Left Rear Low Tire Pressure Sensor Signal Invalid

DTC C0765 00

- Right Rear Low Tire Pressure Sensor

DTC C0765 08

- Right Rear Low Tire Pressure Sensor Signal Invalid

Circuit/System Description

The tire pressure monitor (TPM) system has a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly. As vehicle speed

increases, centrifugal force closes the sensors internal roll switch, which puts the sensor into Rolling mode. The remote control door lock receiver

(RCDLR) receives and translates the data contained in the tire pressure sensor RF transmissions into sensor presence, sensor mode, and tire

pressure. Once vehicle speed is greater than 40km/h (25 mph), the RCDLR waits for the sensors to go into rolling mode. If one or more sensors do

not go into rolling mode, or do not transmit at all, the RCDLR will set DTC C0750, C0755, C0760, or C0765 respectively.

Conditions for Running the DTC

Vehicle speed is greater than 40 km/h (25 mph).

Conditions for Setting the DTC

* A sensor does not transmit for 18 minutes.

* A sensor low battery condition.

Action Taken When the DTC Sets

* The tire pressure monitor indicator icon on the instrument panel cluster (IPC) flashes for 1 minute and then remains illuminated after the

ignition switch is cycled ON and the IPC bulb check is complete.

* If equipped, the driver information center (DIC) displays the suspect tire pressure as dashes.

* If equipped, the DIC displays a service tire monitor type message.

Conditions for Clearing the DTC

* A current DTC will clear when the malfunction is no longer present and 1 ignition cycle occurs.

* The RCDLR automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

* Some aftermarket wheel valve stem holes are located further from the wheel rim than original equipment wheels. When using the TPM

special tool to activate a sensor, ensure the tool antenna is no further than 15 cm (6 in) from the sensor and is aiming upward.

* Aftermarket wheel valve stem locations can cause a sensor to not function correctly.

* A sensor may have been damaged due to a previous wheel/tire service or flat tire event.

* The use of other than GM approved tire sealants can obstruct the sensor pressure sensing port and cause inaccurate tire pressure readings. If

this condition is verified, remove the sealer from the tire and replace the sensor. Refer toTire Pressure Indicator Sensor Replacement (Snap In

Style) (See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure Sensor/Service and Repair).

* Occasionally sensor transmissions are not received by the RCDLR due to vehicle level RF interference from items such as but not limited to