C0750

DTC C0750, C0755, C0760, or C0765





Circuit Description
The Tire Pressure Monitor (TPM) sensors begin to transmit a unique identification code and radio frequency signal to the Remote Control Door Lock Receiver (RCDLR), also known as the Remote Function Actuation (RFA module, when vehicle speed is greater than 1 - 24 km/h (10 - 15 mph), or the sensors are in power up mode. This information is translated by the RCDLR into tire location and tire pressure. The RCDLR waits for the first sensor to transmit its information 8 times. The RCDLR then checks if all sensors have transmitted their information. If one or more TPM sensors do not transmit their information, the RCDLR will set the appropriate DTC for the sensor that did not transmit.

Conditions for Setting the DTC
^ The vehicle is driven for about 35 minutes at speeds over 32 km/h (20 mph) and the TPM sensor has not transmitted tire pressure information.
^ If any given sensor stops transmitting.

Action Taken When the DTC Sets
^ DTC is stored in memory.
^ The DIC displays the SERVICE TPM SYSTEM 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 50 consecutive ignition cycles with no malfunction present.
^ Using the scan tool

Diagnostic Aids
^ If there is an open in the serial data circuit to the receiver, the DTC will display dashes for all tire pressure values and the SERVICE TPM SYSTEM warning message.
^ Clear the TPM DTCs before road testing the vehicle whenever a TPM sensor is replaced in order to avoid reading the original DTCs.
^ Take tire pressure measurements when the tires are cold to obtain the lowest readings.
^ Occasionally TPM sensor transmission will not be received by the RCDLR due to vehicle level radio frequency interference.

Test Description
The number(s) below refers to the step number on the diagnostic table.
4. Tests whether the condition is module, system, or condition related.
7. Tests whether the condition has been corrected or identified as specified in supporting text.