DTC B1175: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Open

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.
Turn the ignition switch OFF, and then back ON (II).
Wait for 30 seconds or more.
Check for DTCs with the HDS.
Is DTC B1175 indicated?

YES - Go to the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ).

NO - Intermittent failure, the gauge control module is OK at this time. Check for loose or poor connections.
Do the fuel gauge sending unit test (see FUEL GAUGE SENDING UNIT TEST ).
Is the fuel gauge sending unit OK?

YES - Go to step 6.

NO - Replace the fuel gauge sending unit.
Turn the ignition switch OFF.
Disconnect the fuel pump 5P connector (see FUEL GAUGE SENDING UNIT TEST ).
Disconnect gauge control module connector A (20P).
Connect fuel pump 5P connector terminal No. 2 to body ground with a jumper wire.

Fig 1: Connecting Fuel Pump 5P Connector Terminal No. 2 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between gauge control module connector A (20P) terminal No. 19 and body ground.

Fig 2: Checking Continuity Between Gauge Control Module Connector A (20P) Terminal No. 19 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 11.

NO - Repair an open in the wire.
Disconnect the secondary fuel gauge sending unit 5P connector (see FUEL GAUGE SENDING UNIT TEST ).
Connect secondary fuel gauge sending unit 5P connector terminal No. 1 to body ground with a jumper wire.

Fig 3: Connecting Secondary Fuel Gauge Sending Unit 5P Connector Terminal No. 1 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between gauge control module connector A (20P) terminal No. 18 and body ground.

Fig 4: Checking Continuity Between Gauge Control Module Connector A (20P) Terminal No. 18 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 14.

NO - Repair an open in the wire.
Check for continuity between fuel tank unit 5P connector terminal No. 1 and secondary fuel gauge sending unit 5P connector terminal No. 2.

Fig 5: Checking Continuity Between Terminal No. 1 And Secondary Fuel Gauge Sending Unit 5P Connector Terminal No. 2
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 wire.