Honda HR-V Owners & Service Manuals

Honda HR-V: Troubleshooting

FUEL PUMP CIRCUIT TROUBLESHOOTING

If you suspect a problem with the fuel pump, check that the fuel pump actually runs; when it is on, you will hear some noise if you listen to the fuel fill port with the fuel fill cap removed. The fuel pump should run for 2 seconds when the vehicle is turned to ON mode. If the fuel pump does not make noise, check as follows:

1. Under-dash fuse/relay box internal circuit check.

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.

Fuel and Emissions - Testing & Troubleshooting

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Go to step 3.

NO

Go to step 2.

2. Open wire check (FI MAIN RLY OUT line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

Fuel and Emissions - Testing & Troubleshooting

  1. Disconnect the following connector.

Under-dash fuse/relay box connector Q (40P)

  1. Connect terminals A and B with a jumper wire.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

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

Fuel and Emissions - Testing & Troubleshooting

Is there continuity?

YES

Replace the under-dash fuse/relay box.

NO

Repair an open in the FI MAIN RLY OUT wire between PGM-FI main relay 1 and the under-dash fuse/relay box.

3. Open wire check (IG1 FUEL PUMP) line).

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

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Go to step 4.

NO

  • Check the No. C32 (15 A) fuse in the under-dash fuse/relay box.
  • If needed, replace the under-dash fuse/relay box.

4. Open wire check (FUEL PUMP RLY CL- line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Jump the SCS line with the HDS.

SCS Short

  1. Disconnect the following connector.

PCM connector A (51P)

  1. Connect terminals A and B with a jumper wire.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

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

Fuel and Emissions - Testing & Troubleshooting

Is there continuity?

YES

The FUEL PUMP RLY CL- wire is OK. Go to step 5.

NO

Repair an open in the FUEL PUMP RLY CL- wire between PGM-FI main relay 2 and the PCM (A42).

5. Determine possible failure area (PGM-FI main relay 2, others).

  1. Remove the jumper wire from the PGM-FI main relay 4P socket.
  2. Reinstall PGM-FI main relay 2.
  3. Connect terminals A and B with a jumper wire.

Fuel and Emissions - Testing & Troubleshooting

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Go to step 6.

NO

Replace PGM-FI main relay 2.

6. PCM operation check.

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Remove the jumper wire from PCM connector A (51P).
  3. Reconnect PCM connector A (51P).
  4. Exit the SCS mode with the HDS.

SCS Open

  1. Turn the vehicle to the ON mode, and measure the voltage between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.

NO

Go to step 7.

7. Determine possible failure area (FUEL PUMP RLY OUT line, GND line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Reinstall PGM-FI main relay 2.
  3. Disconnect the following connector.

Fuel tank unit 4P connector

  1. Turn the vehicle to the ON mode, and measure the voltage between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Go to step 10.

NO

Go to step 8.

8. Open wire check (FUEL PUMP RLY OUT line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.

Fuel and Emissions - Testing & Troubleshooting

  1. Connect terminals A and B with a jumper wire.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

The FUEL PUMP RLY OUT wire is OK. Replace PGM-FI main relay 2.

NO

Go to step 9.

9. Open wire check (FUEL PUMP RLY OUT line) 2.

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

Fuel and Emissions - Testing & Troubleshooting

Is there battery voltage?

YES

Repair an open in the FUEL PUMP RLY OUT wire between the under-dash fuse/relay box and the fuel tank unit.

NO

The FUEL PUMP RLY OUT wire is OK. Replace the under-dash fuse/relay box.

10.Open wire check (GND line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Check for continuity between test points 1 and 2.

Fuel and Emissions - Testing & Troubleshooting

Fuel and Emissions - Testing & Troubleshooting

Is there continuity?

YES

The GND wire is OK. Replace the fuel pump - Refer to: Fuel Tank Unit Removal and Installation (2WD), or Fuel Tank Unit Removal and Installation (AWD).

NO

Repair an open in the GND wire between the fuel tank unit 4P connector and G502.

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