DTC Troubleshooting: P154A
DTC P154A: Battery Sensor Internal Failure
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P154A Battery Sensor Internal Failure
      

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS, and wait 5 seconds.


?3.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P154A Battery Sensor Internal Failure
      

Is DTC P154A indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the 12 volt battery sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Determine possible failure area (12 volt battery sensor, others):

Determine possible failure area (12 volt battery sensor, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
12 volt battery sensor 3P connector

?3.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
12 volt battery sensor 3P connector: disconnected
Test point 1
12 volt battery sensor 3P connector No. 1
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Fuse check:

Fuse check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Check the following fuse.
Fuse
No. B15 (7.5 A)
Location
Under-hood fuse/relay box

Is the fuse OK?

     
YES
     
     
     
Repair an open in the +B BATT SNSR wire between the 12 volt battery sensor and the No. B15 (7.5 A) fuse.?
     
NO
     
     
     
Repair a short in the +B BATT SNSR wire between the 12 volt battery sensor and the No. B15 (7.5 A) fuse. Also replace the No. B15 (7.5 A) fuse.?