DTC Advanced Diagnostics: P154A
DTC P154A:Battery Sensor Internal Failure (Engine Type: J35Y1, J35Y2)

General Description

The battery sensor is connected between the 12 volt battery and ground. It is also connected to the gauge control module by the local interconnect network (LIN) line and transmits/receives battery sensor information to/from the powertrain control module (PCM) via the controller area network (CAN) line. The battery sensor measures the 12 volt battery’s current, voltage, and temperature. When the PCM requests this information to operate the engine electrical system efficiently, the battery sensor runs a diagnostic program and sends the results to the PCM via the LIN and the CAN line. If the diagnostic results are outside the normal range, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
10 seconds or more
DTC Type
One drive cycle, MIL off
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
 
Engine start/stop button
ON mode
No active DTCs set (prevents monitor from running)
P16E3

Malfunction Threshold
Either one of the conditions is met for at least 5 seconds:
Internal current detection circuit open or A/D conversion circuit abnormal
Internal voltage detection circuit open/short or A/D conversion circuit abnormal
Internal temperature detection circuit open/short or A/D conversion circuit abnormal
Calibration data abnormal

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Battery sensor internal failure

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.