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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Tire Pressure Monitoring System) >> Diagnostic Information and Procedures >> DTC C0750, C0755, C0760, or C0765 >> Circuit/System Verification

Circuit/System Verification

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  1. Verify there are no other DTCs set, except for DTC C0750, C0755, C0760 or C0765
    • Go to next step: If no other DTCs are set 
  2. Verify the scan tool Tire Pressure Sensor Signal Quality parameter of all 4 tire pressure sensors is communicating maximum of 300 s and not rising while driving the vehicle above 40 km/h (25 mph) for greater than 5 min.
    3. NOTE:

    All TPM sensors should display a saw-tooth wave form that returns to zero, ideally each 60 seconds (or 10 seconds for a period after a relearn). If any timer reaches 1080 seconds a "too few pulses" code will set. It is not unusual for transmissions to occasionally be missed due to many factors, however if an individual location is growing to 300-500 seconds there is likely something faulty or interfering with this transmission.

    In this event, one should rotate and relearn the tires and then reevaluate. If the same wheel, in the new position continues to infrequently reset to zero - growing to 300-500 seconds replace the TPM Sensor in that wheel. If the large accumulation of seconds remains in the same vehicle position after the rotation, the fault is likely due to a radio frequency interference. Refer to Diagnostic Aids.

    • If the Tire Pressure Sensor Signal Quality parameter is not communicating maximum of 300 s and rising on one or more tires 
    1. Move the appropriate tire to a different location on the vehicle if possible or swap the two components, the original component that is not responding with another known good component from the vehicle and verify the Tire Pressure Sensor Signal Quality is communicating maximum of 300 s and not rising. Refer to Tire and Wheel Removal and Installation .
      • If Tire Pressure Sensor Signal Quality parameter does not communicate maximum of 300 s and rising after moving tire or component to different location, replace the appropriate B2 Tire Pressure Sensor and perform the Tire Pressure Indicator Sensor Learn .
      • If Tire Pressure Sensor Signal Quality parameter does communicate maximum of 300 s and not rising after moving tire or components to different location, check for any aftermarket devices that could be causing interference to the tire pressure sensor signal.
    • Go to next step: If the Tire Pressure Sensor Signal Quality parameter is communicating maximum of 300 s and not rising on one or more tires 
  4. Perform the Tire Pressure Indicator Sensor Learn .
  5. Verify the scan tool Tire Pressure Sensor Mode parameter changes to Drive while driving the vehicle above 40 km/h (25 mph) for greater than 2 min.
    • If a Tire Pressure Sensor Mode parameter does not change to Drive 
    1. Replace the appropriate B2 Tire Pressure Sensor.
    2. Perform the Tire Pressure Indicator Sensor Learn .
    • Go to next step: If the Tire Pressure Sensor Mode parameter does change to Drive 
  6. All OK.
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