DTC B1A28 / B1A29 / B1A2A / B1A2B

Precautions: Precautions for Diagnosing Trouble · Precautions for Control Systems · General safety (00)

DTC Detecting Condition and Trouble Area

DTC detecting condition	Trouble area
B1A28: Right Front Tire Pressure Sensor Temperature Too High B1A29: Left Front Tire Pressure Sensor Temperature Too High B1A2A: Right Rear Tire Pressure Sensor Temperature Too High B1A2B: Left Rear Tire Pressure Sensor Temperature Too High This DTC is detected if all of the following conditions are met. •TPMS control module does not receive any data from tire pressure sensor although vehicle has run for more than 6 minutes at 25 km/h (16 mile/h) or more. •TPMS control module receives higher tire temperature than specified value.	•Tire pressure sensor No.1, No.2, No.3 and/or No.4 •TPMS control module

DTC detecting condition

Trouble area

B1A28: Right Front Tire Pressure Sensor Temperature Too High
B1A29: Left Front Tire Pressure Sensor Temperature Too High
B1A2A: Right Rear Tire Pressure Sensor Temperature Too High
B1A2B: Left Rear Tire Pressure Sensor Temperature Too High
This DTC is detected if all of the following conditions are met.

•TPMS control module does not receive any data from tire pressure sensor although vehicle has run for more than 6 minutes at 25 km/h (16 mile/h) or more.
•TPMS control module receives higher tire temperature than specified value.

•Tire pressure sensor No.1, No.2, No.3 and/or No.4
•TPMS control module

DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.

1)Set ignition “OFF” and leave ignition “OFF” for 30 minutes or more.

2)Drive vehicle at 25 km/h (16 mile/h) or more for 6 minutes or more on paved road.

DTC Troubleshooting

Step	Action	Yes	No
1	Do you have recommended tool?	Go to Step 2.	Go to Step 4.
2	Tire pressure sensor check 1)Using recommended tool, check DTC detected tire pressure sensor. Recommended tool “VT55” or “VT30” made by ATEQ Is check result OK?	Go to Step 3.	Go to Step 4.
3	DTC check 1)Clear DTC. 2)Perform DTC Confirmation Procedure and then recheck DTC. Is DTC B1A28, B1A29, B1A2A or B1A2B still detected?	Go to Step 4.	Check for intermittent trouble.
4	DTC check 1)Replace DTC detected tire pressure sensor. 2)Clear DTC. 3)Perform DTC Confirmation Procedure and then recheck DTC. Is DTC B1A28, B1A29, B1A2A or B1A2B still detected?	Replace TPMS control module and recheck DTC.	End.