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DTC B1A10: Keyless/KOS
key 1 low battery
DTC B1A11: Keyless/KOS key 2 low battery
DTC B1A12:
Keyless/KOS key 3 low battery
DTC B1A13: Keyless/KOS key 4 low battery
DTC
B1A14: Keyless key 5 low battery
DTC B1A15: Keyless key 6 low battery
DTC
B1A16: Keyless key 7 low battery
DTC B1A17: Keyless key 8 low battery
| caution |
When replacing the ECU, always
check that the communication circuit is normal.
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DTC SET CONDITION
WCM sets DTC B1A10, B1A11, B1A12, B1A13, B1A14, B1A15, B1A16, or B1A17 when it receives low
battery voltage signal from the transmitter.
TECHNICAL DESCRIPTION (COMMENT)
- B1A10: WCM determines that the abnormality is present
when it receives low battery voltage signal from the transmitter 1 (the first transmitter registered
in WCM) five consecutive times.
- B1A11: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 2 (the second transmitter registered in WCM) five consecutive times.
- B1A12: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 3 (the third transmitter registered in WCM) five consecutive
times.
- B1A13: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 4 (the fourth transmitter registered in WCM) five consecutive times.
- B1A14: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 5 (the fifth transmitter registered in WCM) five consecutive
times.
- B1A15: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 6 (the sixth transmitter registered in WCM) five consecutive
times.
- B1A16: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 7 (the seventh transmitter registered in WCM) five consecutive times.
- B1A17: WCM determines that the abnormality is present when it receives low battery
voltage signal from the transmitter 8 (the eighth transmitter registered in WCM) five consecutive times.
TROUBLESHOOTING HINTS
- Battery failure in the transmitter
- Malfunction of the transmitter
- Malfunction of WCM
DIAGNOSIS
STEP 1. Replace the battery in the transmitter and recheck
the diagnostic trouble code.
Replace the battery in the transmitter by which the DTC is set with a new one, and recheck
if the DTC is set (Refer to 
).
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(1)Replace the battery in the transmitter by which the DTC is set.
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(2)Use the transmitter to lock/unlock the doors.
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(3)Check if the DTC is set.
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Q.
Is the DTC set?
Go to Step 2.
The diagnosis is complete (Discharged battery).
STEP 2. Replace the transmitter and recheck the diagnostic trouble
code.
Replace the transmitter by which the DTC is set with a new one, register the key ID and
the keyless entry secret code (Refer to ), and recheck if the DTC
is set.
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(1)Use the transmitter to lock/unlock the doors.
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(2)Check if the DTC is set.
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Q.
Is the DTC set?
Replace WCM and register the ID codes (Refer to ).
The diagnosis is complete.