C0750
DTC C0750, C0755, C0760, or C0765
Circuit Description
The tire pressure monitor (TPM) system has 4 radio frequency (RF) transmitting pressure sensors inside each wheel/tire assembly. As vehicle speed increases to at least 32 km/h (20 mph) the sensor's internal roll switch closes which puts the sensors into drive mode. The sensors begin to transmit once every 60 seconds to the passenger door module (PDM) or remote control door lock receiver (RCDLR) if equipped. The data within the sensors RF transmission is translated by the PDM or RCDLR into sensor presence, sensor mode, and tire pressure. If a sensor did not go into drive mode, or is not transmitting at all, the PDM or RCDLR will set the appropriate DTC.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
^ DTC C0750 Left Front Low Tire Pressure Sensor
^ DTC C0755 Right Front Low Tire Pressure Sensor
^ DTC C0760 Left Rear Low Tire Pressure Sensor
^ DTC C0765 Right Rear Low Tire Pressure Sensor
Conditions for Running the DTC
Vehicle speed is 40 km/h (25 mph), or greater for 2 minutes.
Conditions for Setting the DTC
Any given sensor stops transmitting for 5 minutes.
Action Taken When the DTC Sets
^ A DTC is stored in memory.
^ The driver information center (DIC) displays the SERVICE TIRE MONITOR warning message.
Conditions for Clearing the DTC
^ A current DTC will clear when the malfunction is no longer present.
^ A history DTC will clear after 100 consecutive malfunction-free ignition cycles.
^ Using a scan tool
Diagnostic Aids
^ Occasionally, sensors can become mislocated due to previous tire rotations where the sensor learn procedure was not performed. Always learn the sensors to ensure the DTC set is for that actual physical corner of the vehicle. Refer to Tire Pressure Sensor Learn. Scan Tool Data Definitions
^ Occasionally, sensor transmissions are not received by the PDM due to vehicle level RF interference.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests if the sensors internal battery level is low.
3. This step tests if the malfunction was system, or vehicle condition related.
5. This step tests if the sensors internal roll switch is functioning properly.
6. This step tests if the malfunction was corrected by sensor replacement of if the malfunction still exists in the PDM or RCDLR.
