What this code means
B1192 may mean the gauge control module is not communicating with the battery sensor ECU over the LIN communication line.
What the vehicle may do
- The vehicle may store the code during a scan.
- Warning messages or charging-system related symptoms can be possible depending on the condition.
- The issue may also be intermittent if the code does not return during verification.
Possible fault areas
- Possible battery sensor power feed concern.
- Possible LIN communication wire concern.
- Possible loose or poor connector condition.
- Possible battery sensor concern.
Diagnostic path
Open and context
This episode is for B1192 on a Honda Accord. In plain terms, the gauge control module may not be communicating with the battery sensor ECU over the LIN line. The driver may see warning messages, charging-system related behavior, or the code may simply be stored during a scan. The broad fault areas can include the battery sensor power feed, the LIN communication wire, connector condition, or the battery sensor itself. If other codes are present, check what they mean first so you do not chase B1192 out of order.
Verify the code
Start by verifying the fault. Clear the DTCs with the HDS. Turn the vehicle to the OFF (LOCK) mode, then back to the ON mode. Wait for at least 4 seconds, then check for DTCs again with the HDS. If B1192 comes right back, continue with the fuse check. If it does not return, treat it as an intermittent condition for now. The system is OK at this time, so look closely for loose or poor connections before going deeper.
Check the battery sensor feed fuse
Next, check the No. A5 (10 A) fuse in the under-hood fuse and relay box. If that fuse is OK, keep moving down the circuit path. If the fuse is not OK, replace the fuse. If it blows again, repair a short to ground in the No. A5 (10 A) fuse circuit before continuing.
Check the +B HORN feed to the battery sensor
Now check the power feed at the battery sensor. Turn the vehicle to the OFF (LOCK) mode and disconnect the battery sensor 3P connector. Measure voltage between battery sensor 3P connector No. 2, the RED wire, and body ground. This is the +B HORN circuit. With the connector disconnected and the vehicle in OFF (LOCK), you should be looking for battery voltage there. If battery voltage is present, that feed wire is OK and you can move to the LIN wire. If battery voltage is not present, repair an open or high resistance in that wire.
Check the LIN wire for an open
With the vehicle still in OFF (LOCK), disconnect gauge control module connector A, the 32P connector. Check continuity between gauge control module connector A No. 23, the LT BLU wire, and battery sensor 3P connector No. 3, also the LT BLU wire. This checks the LIN(BATT SENSOR) line between the gauge control module and the battery sensor. If you have continuity, the LIN wire is not open, so continue to the short-to-ground check. If you do not have continuity, there is an open or poor connection in that LIN wire between the gauge control module and the battery sensor.
Check the LIN wire for a short to ground
For the final circuit check, leave the battery sensor 3P connector and gauge control module connector A disconnected. Check continuity between battery sensor 3P connector No. 3, the LT BLU wire, and body ground. If there is continuity to ground, repair a short to ground in the LIN(BATT SENSOR) wire between the gauge control module and the battery sensor. If there is no continuity to ground, the LIN(BATT SENSOR) wire is OK, and the diagnostic path calls for replacing the battery sensor.
Confirm the result
After the repair called out by your test result, confirm the code stays gone. Use the same check: clear the DTCs with the HDS, turn the vehicle OFF (LOCK) and then ON, wait for at least 4 seconds, and recheck for B1192. The takeaway is simple: prove the code, confirm the fuse and battery sensor feed, then test the LIN wire for an open and a short before condemning the sensor. For more diagnostic training, visit stepdiagnostics.com.
Final check
B1192 is often approached by confirming the code first, then checking the fuse, the battery sensor feed, and the LIN circuit before making a repair decision.
For more guided automotive diagnostics, visit STEP Diagnostics.
