Bosch TPA 300 User Manual page 15

1.7 Sensor Reading Problems
If the tool has problems reading sensors, use the troubleshooting guide below.
Trigger Sensor
TPMS sensor reading problems – Troubleshooting guide
1) The vehicle has no TPMS sensors even if a metal stem is present. For example,
Schrader valves can look the same as TPMS valves.
▶ Check for the presence of TPMS sensors on the vehicle. Use the TPMS
tool to check the type of TPMS valve (direct or indirect) that is mounted
on the vehicle. Note: Indirect TPMS systems operate without sensors
mounted in the tires.
▶ If the vehicle was not originally fitted with TPMS sensors, the tool will
display "Indirect TPMS."
2) The TPMS sensor or ECU may be damaged or defective.
▶ Check all these elements separately in order to eliminate the possible
problem.
3) The TPMS sensor only responds to a certain frequency.
▶ Check the communication frequency of the vehicle's TPMS sensors. This
is generally 433 MHz for Europe and 315 MHz for the United States and
Japan. Ensure the vehicle is not a vehicle imported from another
region since it may be set to a different frequency.
© Bosch Automotive Service Solutions Inc.
The tool has not detected a sensor. Try again.
TPA 300 | User Guide | 15 | en-US
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1699502721 | REV. A | MAY 2020