With RPO WC2 or WC8

DTC C0750, C0755, C0760, or 00765 (w/ WC2 or WC8)

Circuit Description
The Tire Pressure Monitor (TPM) system has 9 radio frequency (RF) transmitting pressure sensor secured to the run flat ring inside each wheel/tire assembly. As vehicle speed increases to above 32 km/h (20 mph) the sensors internal roll switch closes which puts the sensors 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 have gone into drive mode.

Conditions for Running the DTC
Vehicle speed is at least 40 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 35 minutes.

Action Taken When the DTC Sets
^ A DTC is stored in memory.
^ The DIC displays the SERVICE TIRE MONITOR warring message.
^ The DIC displays 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
^ Loss of, or low system battery voltage, or disconnecting the RCDLR will cause the sensor Id codes to be erased from the RCDLRs memory and set all 4 sensor DTCs. If this conditions is suspected, refer to Tire Pressure Sensor Learn (w/o WC2 or WC8) or Tire Pressure Sensor Learn (w/ WG2 or WC8).
^ Occasionally sensors can become mislocated due to previous tire rotations where sensor Id relocation procedure was not performed. Always enter the sensor Id codes in there proper location as noted on the outside of the vehicles wheel mounting flanges to ensure the DTC set is for that actual physical corner of the vehicle. Refer to Tire Pressure Sensor Learn (w/o WC2 or WC8) or Tire Pressure Sensor Learn (w/ WC2 or WC8).
^ Occasionally sensor transmissions are not received by the RCDLR due to vehicle level RF interference.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Tests if the sensors internal battery level is low.
3. Tests it the malfunction was system, or vehicle condition related.
5. Tests if the malfunction was corrected by sensor replacement or if the malfunction still exists in the RCDLR.





Test Procedure