DTC B1175: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Malfunction (With SH-AWD)

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2015-17), or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2018-19) .

DTC (Gauge Control Module)

1. Problem verification

   -1. Check the fuel gauge.

   Does the gauge move to the empty position and the low fuel indicator blink?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Fuel gauge operation check 1

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Fuel tank unit 4P connector

   - 3. Connect terminals A and B with a 2 Ω resistor and a jumper wire.

   Terminal A	Fuel tank unit 4P connector No. 2
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   - 4. Remove the No. A29 (10 A) fuse from the under-hood fuse/relay box for at least 10 seconds, then reinstall it.

   - 5. Turn the vehicle to the ON mode.

   - 6. Check the fuel gauge.

   Does the gauge move to the full position?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Open wire check (FUEL GAUGE+ line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode Fuel tank unit 4P connector: disconnected
   Test point 1	Gauge control module 32P connector No. 6 - Refer to: Gauge Control Module Connector For Inputs And Outputs (Without SH-AWD) (2015-17), or Gauge Control Module Connector For Inputs And Outputs (With SH-AWD) (2015-17), or Gauge Control Module Connector for Inputs and Outputs (2018-19)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Repair an open or high resistance in the wire.

   NO 

   The FUEL GAUGE+ wire is OK. Replace the gauge control module .

4. Fuel gauge operation check 2

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Reconnect the following connector.

   Fuel tank unit 4P connector

   - 3. Disconnect the following connector.

   Secondary fuel gauge sending unit 4P connector

   - 4. Connect terminals A and B with a 2 Ω resistor and a jumper wire.

   Terminal A	Secondary fuel gauge sending unit 4P connector No. 2
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   - 5. Remove the No. C16 (10 A) fuse from the under-hood fuse/relay box for at least 10 seconds, then reinstall it.

   - 6. Turn the vehicle to the ON mode.

   - 7. Check the fuel gauge.

   Does the gauge move to the full position?

   YES 

   Go to step 6.

   NO 

   Go to step 5.

5. Open wire check (FUEL GAUGE- line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Gauge control module 32P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Gauge control module 32P connector: disconnected Secondary fuel gauge sending unit 4P connector: disconnected
   Test point 1	Gauge control module 32P connector No. 31 - Refer to: Gauge Control Module Connector For Inputs And Outputs (Without SH-AWD) (2015-17), or Gauge Control Module Connector For Inputs And Outputs (With SH-AWD) (2015-17), or Gauge Control Module Connector for Inputs and Outputs (2018-19)
   Test point 2	Secondary fuel gauge sending unit 4P connector No. 4

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The FUEL GAUGE- wire is OK. Replace the secondary fuel gauge sending unit .

   NO 

   Repair an open or high resistance in the wire.

6. Open wire check (SUB FUEL PUMP line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Fuel tank unit 4P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Fuel tank unit 4P connector: disconnected Secondary fuel gauge sending unit 4P connector: disconnected
   Test point 1	Fuel tank unit 4P connector No. 4
   Test point 2	Secondary fuel gauge sending unit 4P connector No. 2

   Courtesy of HONDA, U.S.A., INC.

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair an open or high resistance in the wire between the fuel tank unit and the secondary fuel gauge sending unit.

   NO 

   The SUB FUEL PUMP wire is OK. Replace the fuel tank unit - Refer to: Fuel Tank Unit Removal and Installation (With SH-AWD), or Fuel Tank Unit Removal and Installation (Without SH-AWD) .