2010 Cadillac Truck SRX FWD V6-3.0L Page 867
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 C0750 03
- Left Front Tire Pressure Sensor Low Voltage
DTC C0750 29
- Left Front Tire Pressure Sensor Too Few Pulses
DTC C0750 39
- Left Front Tire Pressure Sensor Internal Malfunction
DTC C0755 03
- Right Front Tire Pressure Sensor Low Voltage
DTC C0755 29
- Right Front Tire Pressure Sensor Too Few Pulses
DTC C0755 39
- Right Front Tire Pressure Sensor Internal Malfunction
DTC C0760 03
- Left Rear Tire Pressure Sensor Low Voltage
DTC C0760 29
- Left Rear Tire Pressure Sensor Too Few Pulses
DTC C0760 39
- Left Rear Tire Pressure Sensor Internal Malfunction
DTC C0765 03
- Right Rear Tire Pressure Sensor Low Voltage
DTC C0765 29
- Right Rear Tire Pressure Sensor Too Few Pulses
DTC C0765 39
- Right Rear Tire Pressure Sensor Internal Malfunction
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 body control module (BCM)
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 BCM waits for the first sensor to go into Rolling mode, then checks if all sensors have gone into
Rolling mode. If one or more sensors do not go into these modes, or do not transmit at all, the BCM 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.
