Fuel Supply System Acura RSX I

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2002-2004 models

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 ignition switch is first turned on. If the fuel pump does not make noise, check as follows

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1. Turn the ignition switch OFF.
2. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A).
3. Turn the ignition switch ON (II).
4. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 5 and body ground. Is there battery voltage? YES - Go to step 5. NO - Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and PGM-FI main relay 2 (FUEL PUMP).
5. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 6. NO - Check the No. 17 (15 A) fuel pump fuse. If the fuse is OK, repair open in the wire between the underdash fuse/relay box and PGM-FI main relay 2 (FUEL PUMP).
6. Turn the ignition switch OFF.
7. Disconnect ECM/PCM connector E (31P).
8. Check for continuity between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 3 and ECM/PCM connector terminal E1. Is there continuity? YES - Go to step 9. NO - Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the ECM/PCM (E1).
9. Reinstall PGM-FI main relay 2 (FUEL PUMP).
10. Connect ECM/PCM connector terminal E7 to body ground with a jumper wire.
11. Turn the ignition switch ON (II).
12. Measure voltage between ECM/PCM connector terminal E1 and body ground. Is there battery voltage? YES - Go to step 13. NO - Replace PGM-FI main relay 2 (FUEL PUMP).
13. Turn the ignition switch OFF.
14. Reconnect ECM/PCM connector E (31P).
15. Turn the ignition switch ON (II), and measure voltage between ECM/PCM connector terminal E1 and body ground within 2 seconds. Is there battery voltage? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 16.
16. Turn the ignition switch OFF.
17. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
18. Remove the access panel from the floor.
19. Turn the ignition switch ON (II), and measure voltage between fuel pump 5P connector terminal No. 5 and body ground within 2 seconds. Is there battery voltage? YES - Go to step 24 . NO - Go to step 20.
20. Turn the ignition switch OFF.
21. Remove PGM-FI main relay 2 (FUEL PUMP).
22. Connect PGM-FI main relay 2 (FUEL PUMP) 5P connector terminals No. 1 and No. 2 with a jumper wire.
23. Turn the ignition switch ON (II), and measure voltage between fuel pump 5P connector terminal No. 5 and body ground within 2 seconds. Is there battery voltage? YES - Replace PGM-FI main relay 2 (FUEL PUMP). NO - Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the fuel pump 5P connector.
24. Turn the ignition switch OFF.
25. Check for continuity between fuel pump 5P connector terminal No. 4 and body ground. Is there continuity? YES - Replace the fuel pump. NO - Repair open in the wire between the fuel pump 5P connector and G501.

2005-2006 models

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 ignition switch is first turned on. If the fuel pump does not make noise, check as follows

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1. Turn the ignition switch OFF.
2. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A).
3. Turn the ignition switch ON (II).
4. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 5 and body ground. Is there battery voltage? YES - Go to step 5. NO - Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and PGM-FI main relay 2 (FUEL PUMP).
5. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 6. NO - Repair open in the wire between the underdash fuse/relay box and PGM-FI main relay 2 (FUEL PUMP).
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect ECM/PCM connector E (31P).
9. Check for continuity between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 3 and ECM/PCM connector terminal E17. Is there continuity? YES - Go to step 10. NO - Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the ECM/PCM (E17).
10. Reinstall PGM-FI main relay 2 (FUEL PUMP).
11. Connect ECM/PCM connector terminal E7 to body ground with a jumper wire.
12. Turn the ignition switch ON (II).
13. Measure voltage between ECM/PCM connector terminal E17 and body ground. Is there battery voltage? YES - Go to step 14. NO - Replace PGM-FI main relay 2 (FUEL PUMP).
14. Turn the ignition switch OFF.
15. Remove the jumper wire, and reconnect ECM/PCM connector E (31P).
16. Open the SCS line with the HDS.
17. Turn the ignition switch OFF.
18. Turn the ignition switch ON (II), and measure voltage between ECM/PCM connector terminal E17 and body ground within the first 2 seconds after the ignition switch was turned on. Is there battery voltage? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 20 .
19. Turn the ignition switch OFF.
20. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
21. Remove the access panel from the floor.
22. Measure voltage between fuel pump 5P connector terminal No. 5 and body ground within the first 2 seconds after the ignition switch was turned on. Is there battery voltage? YES - Go to step 28 . NO - Go to step 23.
23. Turn the ignition switch OFF.
24. Remove PGM-FI main relay 2 (FUEL PUMP).
25. Connect PGM-FI main relay 2 (FUEL PUMP) 5P connector terminals No. 1 and No. 2 with a jumper wire.
26. Turn the ignition switch ON (II).
27. Measure voltage between fuel pump 5P connector terminal No. 5 and body ground. Is there battery voltage? YES - Replace PGM-FI main relay 2 (FUEL PUMP). NO - Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the fuel pump 5P connector.
28. Turn the ignition switch OFF.
29. Check for continuity between fuel pump 5P connector terminal No. 4 and body ground. Is there continuity? YES - Replace the fuel pump. NO - Repair open in the wire between the fuel pump 5P connector and G501.

Fuel Pressure Relieving

Before disconnecting fuel lines or hoses, relieve pressure from the system by stopping the fuel pump and disconnecting the fuel tube/quick connect fitting in the engine compartment.

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1. Remove the fuel fill cap.
2. Turn the ignition switch ON (II).
3. From the INSPECTION MENU of the HDS, select Fuel Pump OFF, then start the engine, and let it idle until it stalls.
4. Turn the ignition switch OFF. NOTE: Do not allow the engine to idle above 1,000 RPM or the ECM/PCM will continue to operate the fuel pump. A DTC or a Temporary DTC may be set during this procedure. Check for DTCs, and clear them as needed (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ).
5. Turn the ignition switch OFF.
6. Make sure you have the anti-theft codes for the radio, then write down the frequencies for the radio's preset buttons.
7. Disconnect the negative cable from the battery.
8. Check the fuel quick-connect fitting for dirt, and clean it if needed.
9. Place a rag or shop towel over the quick-connect fitting (A).
10. Disconnect the quick-connect fitting (A): Hold the connector (B) with one hand, and squeeze the retainer tabs (C) with the other hand to release them from the locking tabs (D). Pull the connector off. NOTE: To prevent the remaining fuel in the fuel feed line or hose from flowing out, use a rag or shop towel. Be careful not to damage the line (E) or other parts. Do not use tools. If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily. Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.
11. After disconnecting the quick-connect fitting, check it for dirt or damage (see step 4 ).
12. Reconnect the negative cable to the battery and do these items: ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ). Power window control unit reset procedure (see «RESETTING THE POWER WINDOW CONTROL UNIT»(/acura/rsx/i-2001-2004/remont/windows/#power-windows__resetting-the-power-window-control-unit) ). Enter the anti-theft codes for the radio, then enter the customer's radio station presets. Reset the clock.

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1. Make sure you have the anti-theft codes for the radio, then write down the frequencies for the radio's preset buttons.
2. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A) from the underdash fuse/relay box.
3. Start the engine, and let it idle until it stalls. NOTE: If any DTCs are stored, clear and ignore them.
4. Turn the ignition switch OFF.
5. Remove the fuel fill cap, and relieve the pressure in the fuel tank.
6. Disconnect the negative cable from the battery.
7. Check the fuel quick-connect fitting for dirt, and clean it if needed.
8. Place a rag or shop towel over the quick-connect fitting (A).
9. Disconnect the quick-connect fitting (A): Hold the connector (B) with one hand, and squeeze the retainer tabs (C) with the other hand to release them from the locking tabs (D). Pull the connector off. NOTE: To prevent the remaining fuel in the fuel feed line or hose from flowing out, use a rag or shop towel. Be careful not to damage the line (E) or other parts. Do not use tools. If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily. Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.
10. After disconnecting the quick-connect fitting, check it for dirt or damage (see step 4 ).
11. Reconnect the negative cable to the battery and do these items: ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ). Power window control unit reset procedure (see «RESETTING THE POWER WINDOW CONTROL UNIT»(/acura/rsx/i-2001-2004/remont/windows/#power-windows__resetting-the-power-window-control-unit) ). Enter the anti-theft codes for the radio, then enter the customer's radio station presets. Reset the clock.

Fuel Pressure Test

Special Tools Required

1. Fuel pressure gauge 07406-004000B
2. Fuel pressure gauge attachment set 07AAJ-S6MA150
3. Fuel pressure gauge adapter 07VAJ-0040100

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1. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
2. K20A2/K20Z1/K20A3 (2005-2006 models) engines: Attach the fuel pressure gauge attachment set (A) and the fuel pressure gauge (B) to the fuel line as shown.
3. K20A3 (2002-2004 models) engines: Remove the fuel pulsation damper from its fitting, and attach the fuel pressure gauge adapter (A) and the fuel pressure gauge (B). NOTE: Replace all washers whenever the fuel pulsation damper is loosened or removed.
4. Start the engine and let it idle. If the engine starts, go to step 6 . If the engine does not start, go to step 5.
5. Check to see if the fuel pump is running: listen to fuel fill port with the fuel fill cap removed. The fuel pump run for about 2 seconds when the ignition is turned on. If the pump runs, step 6. If the pump does not run, do the fuel pump circuit troubleshooting (see «FUEL PUMP CIRCUIT TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).
6. Read the pressure gauge. The pressure should be 320-370 kPa (3.3-3.8 kgf/cm 2 , 47-54 psi). If the pressure is OK, the test is complete. If the pressure is out of specification, replace the fuel pressure regulator, 2002-2004 models (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ), 2005-2006 models (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ), and the fuel filter, 2002-2004 models (see «FUEL FILTER REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ), 2005-2006 models (see «FUEL FILTER REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ), then recheck fuel pressure.
7. K20A3 (2002-2004 models) engine: Remove the pressure gauge, and reinstall the fuel pulsation damper with a new washer. Tighten the fuel pulsation damper to 22 N.m (2.2 kgf.m, 16 lbf.ft). NOTE: Disassemble and clean the fuel pressure gauge attachment thoroughly after use.

Fuel Tank Draining

1. Remove the fuel tank unit 2002-2004 models (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pumpfuel-gauge-sending-unit-replacement) ), 2005-2006 models (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).
2. Using a hand pump, a hose, and a container suitable for fuel, draw the fuel from the fuel tank.
3. Install the fuel tank unit 2002-2004 models (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pumpfuel-gauge-sending-unit-replacement) ), 2005-2006 models (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).

Fuel Line Inspection

Check the fuel system lines, hoses, and fuel filter for damage, leaks, or deterioration. Replace any damaged parts.

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Check all clamps and retighten if necessary.

"UTRIF": Do not disconnect the hose from the pipe at these joints.

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Check all clamps and retighten if necessary.

"UTRIF": Do not disconnect the hose from the pipe at these joints.

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Fuel Line/Quick-Connect Fitting Precautions

The fuel line/quick-connect fittings (A), (B), (C), (D) (2005-2006 models), connect the fuel feed hose (E) to the fuel line (F), the fuel feed hose (G) to the fuel rail (H), the fuel line (I) to the fuel tank unit (J), and the fuel vapor line (K) to the EVAP canister (L) (2005-2006 models). When removing or installing the fuel feed hose, fuel tank unit, or fuel feed tank, it is necessary to disconnect or connect the quick-connect fittings.

Pay attention to the following

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1. The fuel feed hoses, fuel line, and quick-connect fittings are not heat-resistant; be careful not to damage them during welding or other heat-generating procedures.
2. The fuel feed hoses, fuel line, and quick-connect fittings are not acid-proof; do not touch them with a shop towel that was used for wiping battery electrolyte. Replace them if they came into contact with electrolyte or something similar.
3. When connecting or disconnecting the fuel feed hoses, fuel line, and quick-connect fittings, be careful not to bend or twist them excessively. Replace them if they are damaged.

2002-2004 models

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2005-2006 models

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2005-2006 models

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A disconnected quick-connect fitting can be reconnected, but the retainer on the mating line cannot be reused once it has been removed from the line.

Replace the retainer when

1. replacing the fuel rail.
2. replacing the fuel line.
3. replacing the fuel pump.
4. replacing the fuel filter.
5. replacing the fuel gauge sending unit.
6. replacing the EVAP purge line.
7. replacing the EVAP canister.
8. it has been removed from the line.
9. it is damaged. LINE DIAMETER SPECIFICATION PLACE MANUFACTURER RETAINER COLOR Line Diameter A Tokai Green 0.2 in. (6.3 mm) B Tokai Blue Green 0.3 in. (8.0 mm) C Sanoh White 0.3 in. (9.5 mm) D (2005-2006 models) Sanoh White 0.3 in. (9.5 mm)

Fuel Line/Quick-Connect Fitting Removal

Note. Before you work on the fuel lines and fittings, read the "Fuel Line/Quick-Connect Fitting Precautions" (see FUEL LINE/QUICK-CONNECT FITTING PRECAUTIONS ).

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1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
2. Check the fuel quick-connect fittings for dirt, and clean it if needed.
3. Place a rag or shop towel over the quick-connect fitting. Hold the connector (A) with one hand and squeeze the retainer tabs (B) with the other hand to release them from the locking tabs (C). Pull the connector off. NOTE: Be careful not to damage the line (D) or other parts. Do not use tools. If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily. Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.
4. Check the contact area (A) of the line (B) for dirt or damage. If it is dirty, clean it. If it is rusty or damaged, replace the fuel pump, fuel filter, or fuel feed line.
5. To prevent damage and keep foreign matter out, cover the disconnected connector and line ends with plastic bags (A). NOTE: The retainer cannot be reused once it has been removed from the line. Replace the retainer when: replacing the fuel rail. replacing the fuel feed line. replacing the fuel pump. replacing the fuel filter. replacing the fuel gauge sending unit. replacing the EVAP purge pipe. replacing the EVAP canister. it has been removed from the line. it is damaged.

Fuel Line/Quick-Connect Fitting Installation

Note. Before you work on the fuel lines and fittings, read the "Fuel Line/Quick-Connect Fitting Precautions" (see FUEL LINE/QUICK-CONNECT FITTING PRECAUTIONS ).

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1. Check the contact area (A) of the line (B) for dirt or damage, and clean it if needed.
2. Insert a new retainer (A) into the connector (B) if the retainer is damaged, or after: replacing the fuel rail. replacing the fuel feed line. replacing the fuel pump. replacing the fuel filter. replacing the fuel gauge sending unit. replacing the EVAP purge pipe. replacing the EVAP canister. removing the retainer from the line. Use the same manufacturer retainer and the same size retainer when the replacing the retainer (see «FUEL LINE/QUICK-CONNECT FITTING PRECAUTIONS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-linequick-connect-fitting-precautions) ).
3. Before connecting a new fuel tube/quick-connect fitting assembly (A), remove the old retainer from the mating line. 2002-2004 models 2005-2006 models 2005-2006 models
4. Align the quick-connect fittings with the line (A), and align the retainer locking tabs (B) with the connector (C) grooves. Then press the quick-connect fittings onto the line until both retainer tabs lock with a clicking sound. NOTE: If it is hard to connect, put a small amount of new engine oil on the line end.
5. When you are reconnecting the connector with the old retainer, make sure the connection is secure and the tabs (A) are firmly locked into place; check visually and also by pulling the connector (B). When you are replacing the fuel line with a new one, make sure you remove the ring pull (C) upwards after you confirm the connection is secure. NOTE: Before you remove the ring pull, make sure the fuel line connection is secure. If the connection is not secure, the ring pull could break when you try to remove it.
6. Reconnect the negative cable to the battery, and turn the ignition switch ON (II) (but do not operate the starter motor). The fuel pump will run for about 2 seconds, and fuel pressure will rise. Repeat two or three times, and check that there is no leakage in the fuel supply system.

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1. Remove the fuel pump (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pumpfuel-gauge-sending-unit-replacement) ).
2. Remove the fuel pressure regulator (A).
3. Install the regulator in the reverse order of removal with a new O-ring (B).

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1. Remove the fuel pump (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).
2. Remove the terminal (A) and clip (B).
3. Remove the fuel pressure regulator (C).
4. Install the regulator in the reverse order of removal with a new O-ring (D).

The fuel filter should be replaced whenever the fuel pressure drops below the specified value (see FUEL PRESSURE TEST ) after making sure that the fuel pump and the fuel pressure regulator are OK.

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1. Remove the fuel tank unit (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pumpfuel-gauge-sending-unit-replacement) ).
2. Remove the fuel filter set (A).
3. Install the filter in the reverse order of removal with a new base gasket (B) and new O-rings (C), then check these items: When connecting the wire harness, make sure the connection is secure and the connectors (D) are firmly locked into place. When installing the fuel gauge sending unit (E), make sure the connection is secure and the connector is firmly locked into place. Be careful not to bend or twist it excessively.

The fuel filter should be replaced whenever the fuel pressure drops below the specified value (see FUEL PRESSURE TEST ) after making sure that the fuel pump and the fuel pressure regulator are OK.

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1. Remove the fuel tank unit (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).
2. Remove the fuel filter set (A).
3. Install the filter in the reverse order of removal with a new base gasket (B) and new O-rings (C), then check these items: When connecting the wire harness, make sure the connection is secure and the connectors (D) are firmly locked into place. When installing the fuel gauge sending unit (E), make sure the connection is secure and the connector is firmly locked into place. Be careful not to bend or twist it excessively.

Fuel Pump/Fuel Gauge Sending Unit Replacement

Special Tools Required

Fuel sender wrench 07AAA-S0XA100

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1. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
2. Remove the fuel fill cap.
3. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
4. Remove the access panel (A) from the floor.
5. Disconnect the fuel pump 5P connector (B).
6. Disconnect the quick-connect fitting (C) from the fuel tank unit.
7. Using the special tool, loosen the fuel tank unit locknut (A).
8. Remove the locknut (A) and the fuel tank unit.
9. Remove the stop (B). Release the hook (C) and remove the fuel filter (D), the fuel gauge sending unit (E), the case (F), the wire harness (G), and the fuel pressure regulator (H).
10. When connecting the fuel tank unit, make sure the connection is secure and the suction filter (I) is firmly connected to the fuel pump (J).
11. Install the fuel tank unit in the reverse order of removal with a new locknut, a new base gasket (K) and new O-rings (L), then check these items: When connecting the wire harness, make sure the connection is secure and the connector (M) is firmly locked into place. When installing the fuel gauge sending unit, make sure the connection is secure and the connector (M) is firmly locked into place. Be careful not to bend or twist it excessively. When installing the fuel tank unit, align the marks (N) on the fuel tank (O) and the fuel tank unit (P).

Special Tools Required

Fuel sender wrench 07AAA-S0XA100

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1. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
2. Remove the fuel fill cap.
3. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
4. Remove the access panel (A) from the floor.
5. Disconnect the fuel pump 5P connector (B) and the EVAP canister vent shut valve and fuel tank pressure sensor subharness 6P connector (C).
6. Disconnect the quick-connect fitting (D) from the fuel tank unit.
7. Using the special tool, loosen the fuel tank unit locknut (A).
8. Remove the locknut (A) and the fuel tank unit.
9. Remove the stop (B). Release the hook (C) and remove the fuel filter (D), the fuel gauge sending unit (E), the case (F), the wire harness (G), and the fuel pressure regulator (H).
10. When connecting the fuel tank unit, make sure the connection is secure and the suction filter (I) is firmly connected to the fuel pump (J).
11. Install the fuel tank unit in the reverse order of removal with a new locknut, a new base gasket (K) and new O-rings (L), then check these items: When connecting the wire harness, make sure the connection is secure and the connectors (M) are firmly locked into place. When installing the fuel gauge sending unit, make sure the connection is secure and the connector (M) is firmly locked into place. Be careful not to bend or twist it excessively. When installing the fuel tank unit, align the marks (N) on the fuel tank (O) and the fuel tank unit (P).

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1. Drain the fuel tank (see «FUEL TANK DRAINING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-tank-draining) ).
2. Jack up the vehicle, and support it with jackstands.
3. Disconnect the fuel vapor hose and quick-connect fittings. Disconnect the hoses. Loosen the clamp (A). Slide back the clamps, then twist the hoses as you pull to avoid damaging them.
4. Place a jack, or other support, under the tank.
5. Remove the strap bolts, and let the strap (B) fall free.
6. Remove the fuel tank (C). If it sticks to the undercoat on its mount, carefully pry it off the mount.
7. Install the parts in the reverse order of removal.

Scheme 68

1. Drain the fuel tank (see «FUEL TANK DRAINING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-tank-draining) ).
2. Jack up the vehicle, and support it with jackstands.
3. Remove the EVAP canister cover (A).
4. Disconnect the fuel fill neck tube (B) and quick-connect fitting (C).
5. Disconnect the vapor line (D) from the EVAP canister.
6. Place a jack, or other support, under the tank.
7. Remove the strap bolts, and let the straps (E) fall free.
8. Remove the fuel tank (F). If it sticks to the undercoat on its mount, carefully pry it off the mount.
9. Install the parts in the reverse order of removal.

Fuel Gauge Sending Unit Test

Special Tools Required

Fuel sender wrench 07AAA-S0XA100

Note. For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram (see CIRCUIT DIAGRAM ).

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

1. Check the No. 10 METER (7.5 A) fuse in the underdash fuse/relay box before testing.
2. Do the gauge drive circuit check (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rsx/i-2001-2004/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ). If the fuel gauge needle sweeps from the minimum to maximum position and then returns to the minimum position, the gauge is OK. Go to step 3. If the fuel gauge needle does not sweep from the minimum to maximum position and then return to the minimum position, replace the gauge assembly and retest.
3. Turn the ignition switch OFF.
4. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
5. Remove the access panel (A) from the floor. 2002-2004 models 2005-2006 models
6. Disconnect the fuel pump 5P connector (B).
7. 2005-2006 models; Disconnect the EVAP canister vent shut valve and fuel tank pressure sensor subharness 6P connector (C).
8. Measure voltage between the fuel pump 5P connector terminals No. 1 and No. 2 with the ignition switch ON (II). There should be battery voltage. If the voltage is as specified, go to step 9. If the voltage is not as specified, check for: a short in the YEL/BLK wire to ground. an open in the YEL/BLK or BLK wire. poor ground (G501).
9. Turn the ignition switch OFF. Remove the No. 9 BACK UP (7.5 A) fuse from the underhood fuse/relay box for at least 10 seconds, and reinstall it.
10. Install a 2 ohm resistor between the fuel pump 5P connector terminals No. 1 and No. 2, then turn the ignition switch ON (II).
11. Check that the pointer of the fuel gauge indicates "F". If the pointer of the fuel gauge does not indicate "F", replace the gauge. If the gauge is OK, go to step 12. NOTE: The pointer of the fuel gauge returns to the bottom of the gauge dial when the ignition switch is OFF, regardless of the fuel level.
12. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
13. Remove the fuel fill cap.
14. Disconnect the quick-connect fittings from the fuel pump.
15. Using the special tool, loosen the fuel tank unit locknut (A), and remove the fuel tank unit from the fuel tank.
16. Measure resistance between the No. 1 and No. 2 terminals with the float at E (EMPTY), 1/2 (HALF FULL), and F (FULL) positions. If you do not get the following readings, replace the fuel gauge sending unit, 2002-2004 models (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pumpfuel-gauge-sending-unit-replacement) ), 2005-2006 models (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ). FLOAT POSITION Float Position F 1/2 LOW E 2002-2004 models; Resistance (ohm) 11 to 13 68.5 to 74.5 114.4 to 126.6 130 to 132 2005-2006 models; Resistance (ohm) 11 to 13 68.5 to 74.5 114.3 to 129.5 130 to 132 NOTE: Remove the No. 9 BACK UP (7.5 A) fuse from the underhood fuse/relay box for at least 10 seconds after completing troubleshooting otherwise it may take up to 20 minutes for the fuel gauge to indicate the correct fuel level. 2002-2004 models 2005-2006 models

Scheme 76

Scheme 77

1. Do the fuel gauge sending unit test (see «FUEL GAUGE SENDING UNIT TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-gauge-sending-unit-test) ). If the system is OK, go to step 2. If the system has any malfunction, repair it.
2. Turn the ignition switch ON (II) with the float at the E (EMPTY) position. If the low fuel indicator light is on, go to step 3. If the low fuel indicator light is not on, refer to the low fuel indicator Circuit Diagram (see «CIRCUIT DIAGRAM»(/acura/rsx/i-2001-2004/remont/gauges-instrument-panels/#gauges) ) and check the circuit.
3. Lift the float above the LOW position. If the low fuel indicator light goes off, the system is OK. If the low fuel indicator light is still on, refer to the low fuel indicator Circuit Diagram (see «CIRCUIT DIAGRAM»(/acura/rsx/i-2001-2004/remont/gauges-instrument-panels/#gauges) ) and check the circuit. 2002-2004 models 2005-2006 models

See also:
• GLOVE BOX REMOVAL/INSTALLATION
• HOW TO UPDATE THE ECM/PCM
• ECM/PCM REPLACEMENT
• REAR SEAT REMOVAL/INSTALLATION
• GENERAL TROUBLESHOOTING INFORMATION
• ECM/PCM IDLE LEARN PROCEDURE
• RESETTING THE POWER WINDOW CONTROL UNIT
• CIRCUIT DIAGRAM
• SELF-DIAGNOSTIC FUNCTION
• FUEL PRESSURE RELIEVING
• FUEL PUMP CIRCUIT TROUBLESHOOTING
• FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT
• FUEL LINE/QUICK-CONNECT FITTING PRECAUTIONS
• FUEL PRESSURE TEST
• FUEL TANK DRAINING
• FUEL GAUGE SENDING UNIT TEST