DTC B1A00

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

DTC Detecting Condition and Trouble Area

DTC detecting condition	Trouble area
B1A00: Battery Voltage Low Power supply circuit voltage is lower than specified value although vehicle has run at 25 km/h (16 mile/h) or more.	•Power supply circuit / ground circuit •TPMS control module

Circuit Diagram

[A]:	TPMS control module connector (View: [a])	A1:	TPMS control module power supply circuit	3.	Ignition switch
[B]:	Ignition switch model	A2:	TPMS control module ground circuit	4.	IG1 relay
[C]:	Keyless push start model	1.	“BCM” fuse	5.	TPMS control module
[D]:	D16AA model	2.	“CRUISE” fuse	6.	“BTRY” fuse

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)Drive vehicle at 25 km/h (16 mile/h) or more for 1 minute.

DTC Troubleshooting

Step	Action	Yes	No
1	TPMS control module power supply circuit check 1)Check that ignition is “OFF”. 2)Disconnect “L306” connector. 3)Check for proper terminal connection to “L306” connector. 4)If OK, check that voltage between “A1” circuit and ground is battery voltage. Is check result OK?	Go to Step 2.	Repair or replace defective wire harness.
2	TPMS control module ground circuit check 1)Check that resistance between “A2” circuit and ground is less than 1 Ω. Is check result OK?	Replace TPMS control module and recheck DTC.	Repair or replace defective wire harness.