C0765

DTC C0750, C0755, C0760, or C0765

Test 1-8:

Circuit Description
The tire pressure monitor (TPM) system has a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly. As vehicle speed increases above 32 km/h (20 mph) the sensors internal roll switch closes which puts the sensor into drive mode. In this mode the sensors begin to transmit once every 60 seconds to the remote control door lock receiver (RCDLR). The data within the sensors RF transmission is translated by the RCDLR into sensor presence, sensor mode and tire pressure. The RCDLR waits for the first sensor to go into drive mode, then checks if all sensors are in drive mode.

Conditions for Running the DTC
Vehicle speed above 32 km/h (20 mph).

Conditions for Setting the DTC
Any given sensor does not go into drive mode, or does not transmit at all for 15 minutes.

Action Taken When the DTC Sets
^ A DTC is stored in memory.
^ The DIC displays the SERVICE TIRE MONITOR warning message.
^ The DIC will display the suspect tire pressure as dashes.

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
^ If the vehicle is stationary for more than 15 minutes after being driven the sensors will go into stationary mode. Always test drive the vehicle over 32 km/h (20 mph) to ensure the sensors are in drive mode before viewing tire pressures on the DIC, or the scan tool.
^ If there is an open in the serial data circuit to the RCDLR, the DIC will display dashes for all tire pressures and the SERVICE TIRE MONITOR warning message.
^ 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.
^ Occasionally sensor transmissions will not be received by the RCDLR due to vehicle level RF interference.

Test Description
The numbers refer to the step numbers on the diagnostic table.
2. Tests if the malfunction is system, or vehicle condition related.
5. Tests if the sensors internal roll switch is functioning properly.
6. Tests if the malfunction was corrected, or if the malfunction still exists in the RCDLR.