DTC B1192: Gauge Control Module Lost Communication With the Battery Sensor (UART LINE)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Wait for at least 15 seconds.
Check for DTCs with the HDS.
Is DTC B1192 indicated?

YES -Go to step 4.

NO -Intermittent failure, the battery sensor is OK at this time.
Check the No. 9 (7.5 A) fuse in the main under-hood fuse box.
Is the fuse OK?

YES -Go to step 5.

NO -Replace the fuse, and recheck the system. If the fuse is blown again, repair a short in the wire.
Turn the ignition switch to LOCK (0)
Disconnect the battery sensor 2P connector.
Measure the voltage between battery sensor 2P connector terminal No. 2 and body ground.

Fig 1: Measuring Voltage Between Battery Sensor 2P Connector Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 8.

NO -Repair an open in the wire between the main under-hood fuse box and the battery sensor.
Disconnect gauge control module connector B (24P).
Measure the voltage between battery sensor 2P connector terminal No. 1 and body ground.

Fig 2: Measuring Voltage Between Battery Sensor 2P Connector Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there voltage?

YES -Repair a short to power in the wire between the gauge control module and the battery sensor.

NO -Go to step 10.
Check for continuity between battery sensor 2P connector terminal No. 1 and body ground.

Fig 3: Checking Continuity Between Battery Sensor 2P Connector Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to ground in the wire between the battery sensor and the gauge control module.

NO -Go to step 11.
Check for continuity between battery sensor 2P connector terminal No. 1 and gauge control module connector B (24P) terminal No. 7.

Fig 4: Checking Continuity Between Battery Sensor 2P Connector And Gauge Control Module Connector B (24P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Substitute a known-good battery sensor, and recheck. If the DTC returns, replace the gauge control module

NO -Repair an open in the wire between the battery sensor and the gauge control module.