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. (see 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.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Check the No. 11 (7.5 A) fuse in the auxiliary under-hood fuse/relay box.
Is the fuse OK?

YES -Go to step 6.

NO -Replace the fuse. If the fuse blows again, repair a short to ground on the No. 11 (7.5 A) fuse circuit.
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 or high resistance in the wire between the auxiliary under-hood fuse/relay box and the battery sensor.
Disconnect gauge control module connector A (32P).
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 battery sensor.

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

Fig 3: Checking For 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 A (32P) terminal No. 12.

Fig 4: Checking For Continuity Between Battery Sensor 2P Connector Terminal No. 1 And Gauge Control Module Connector A (32P) Terminal No. 12
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).

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