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

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 to LOCK (0) and then back to ON (II).
Wait for at least 30 seconds.
Check for DTCs with the HDS.
Is DTC B1175 indicated?

YES -Go to step 5.

NO -Intermittent failure, the fuel level sensor circuit is OK at this time. Check for loose or poor connections between the gauge control module and the fuel tank unit.
Turn the ignition switch to LOCK (0).
Disconnect the fuel tank unit 4P connector and the gauge control module 32P connector.
Disconnect the gauge control module 32P connector.

Fig 1: Connecting Fuel Tank Unit 4P Connector Terminals No. 2 And No. 4 And Body Ground With Jumper Wires
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between gauge control module 32P connector terminals No. 21 and No. 22 and fuel tank unit 4P connector terminals No. 4 and No. 2 respectively.

Fig 2: Checking Continuity Between Body Ground And Gauge Control Module 32P Connector Terminals No. 21 And No. 22 And Fuel Tank Unit 4P Connector Terminals No. 4 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 9.

NO -Repair an open in the wire between the gauge control module and the fuel tank unit.
Do the fuel gauge sending unit test (see FUEL GAUGE SENDING UNIT TEST ).
Is the fuel gauge sending unit OK?

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

NO -Replace the fuel gauge sending unit (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ).