DTC 33

DTC 31, 33, 35, 37: Tire Pressure Sensor Low Battery Voltage

NOTE: This problem occurs when the temperature around the sensor is -40°F (-40°C) or less. Note that the diagnosis must be made in a place where ambient temperature is -40°F (-40°C) or more.

1. Test-drive the vehicle at 28 mph (45 km/h) or more for at least 1 minute.
Does the TPMS indicator go off?
YES - The system is OK at this time. Clear the DTC with the HDS.
NO - Go to step 2.

2. Check for DTCs with the HDS.
3. Note the tire pressure sensor(s) number by the indicated DTC.





4. Determine the affected tire location by the tire pressure sensor number, then check the Tire 1, Tire 2, Tire 3, or Tire 4 Pressure Sensor Transmitter Status in the TPMS DATA LIST with the HDS and the TPMS sensor initializer tool.

NOTE: If Not defined is shown on the HDS, turn the TPMS sensor initializer tool OFF, rotate the tire 1/4 turn, then turn the TPMS sensor initializer tool ON, and try again. If Not defined is still shown, repeat the procedure in the previous sentence until a response is shown.

Is NORMAL indicated within one full turn of the tire?
YES - Go to step 5.
NO - Check that the tire pressure sensor is properly mounted. If necessary, replace the appropriate tire pressure sensor.

5. Check the Tire 1, Tire 2, Tire 3, or Tire 4 Pressure Sensor Transmitter Battery in the TPMS DATA LIST with the HDS.
Is LOW indicated?
YES - Replace the appropriate tire pressure sensor.
NO - Check for loose terminals and poor connections at the TPMS control unit and G502. If necessary, substitute a know-good TPMS control unit, and recheck.