DTC 38

DTC 32, 34, 36, 38: Tire Pressure Sensor Transmitter Failure

NOTE:
^ Inspect for an aftermarket electrical device interfering with the RF signal from the sensors when driving the vehicle.
^ Before you begin troubleshooting, determine the actual location of the TPMS wheel sensor on the vehicle using the tire pressure sensor location procedure.

1. Turn the ignition switch to ON (II).
2. Check for DTCs with the HDS.
3. Note the tire pressure sensor(s) number by the indicated DTC.





4. Turn the ignition switch to LOCK (0).
5. Make sure all four wheels are TPMS wheels with properly mounted tire pressure sensors.

Are TPMS type wheels with a tire pressure sensor mounted on the vehicle?

YES - Go to step 8.

NO - Go to step 6.

6. Substitute a known-good TPMS wheel.
7. Memorize the tire pressure sensor IDs with the HDS.

Did the TPMS control unit memorize the tire pressure sensors?

YES - Replace the original tire pressure sensor.

NO - Go to step 8.

8. Turn the ignition switch to ON (II).
9. Do the tire pressure sensor location procedure to determine the affected tire location and relate it to the tire pressure sensor number.

Did each tire pressure sensor respond to the TPMS initializer tool?

YES - Go to step 10.

NO - Check for an aftermarket electrical device interfering with the RF signals from the sensors. If there are no electrical devices causing interference, replace the appropriate tire pressure sensor.

10. Turn the ignition switch to LOCK (0), and wait 5 minutes or more.
11. Turn the ignition switch to ON (II).
12. Identify the affected tire sensor number from the DTC list on step 3.
13. Locate the affected tire pressure sensor checking the TIRE 1, TIRE 2, TIRE 3, TIRE 4 AIR PRESSURE in the TPMS DATA LIST with the HDS.

Is the default pressure of 145 psi displayed?

YES - Go to step 14.

NO - Repeat steps 10 through 13 until the default pressure (145 psi) is displayed. If the default pressure is never displayed, replace the TPMS control unit.

14. Drive the vehicle over 28 mph (45 km/h), and monitor the affected tire pressure sensor with the HDS.
Did the affected tire pressure sensor change from the default pressure (145 psi) to the correct tire pressure?

YES - The system is OK at this time. Clear the DTC with the HDS.

NO - Replace the appropriate tire pressure sensor.