DTC B1A48
Precautions: Precautions for Diagnosing Trouble · Precautions for Control Systems · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
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B1A48: Vehicle Speed Wrong Data This DTC is detected if any one of the following conditions is met.
•TPMS control module receives higher tire acceleration data than specified value for specified time continuously even if vehicle speed is lower than 5 km/h (3 mile/h).
•TPMS control module receives invalid vehicle speed signal from ECM for specified time continuously. |
•ECM
•Wheel speed sensor •TPMS control module •Tire pressure sensor No.1, No.2, No.3 and/or No.4 |
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.
•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 20 minutes or more.
2)Drive vehicle at 25 km/h (16 mile/h) or more for 10 minutes or more on paved road and winding road as much as possible.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
DTC check
1)Check DTC in ECM.
•M16A model:
 •K14C model: •D16AA model: Is there any DTC(s) detected?
|
Go to troubleshooting for applicable DTC.
|
Go to Step 2.
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| 2 |
DTC check
1)Check DTC in ESP® control module.
Is there any DTC(s) detected?
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Go to troubleshooting for applicable DTC.
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Go to Step 3.
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| 3 |
DTC check
Is DTC B1A20, B1A21, B1A22 or B1A23 detected?
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Go to troubleshooting for applicable DTC.
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Replace TPMS control module and recheck DTC.
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