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Acura RL. Manual - part 535

Fig. 74: Identifying Fuel Pump Control Module And Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove the fuel pump control module (B).

4. Install the parts in the reverse order of removal.

FUEL GAUGE SENDING UNIT TEST

1. Do multiplex integrated control system troubleshooting test mode A (see TROUBLESHOOTING -

B-CAN SYSTEM DIAGNOSIS TEST MODE A ).



If no problem is found, go to step 2.



If DTC B1175 is indicated, go to the DTC B1175 troubleshooting (see DTC B1175: FUEL
LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT OPEN ).

2. Check the No. 21 METER (10 A) fuse in the driver's under-dash fuse/relay box.

3. Do the gauge drive circuit check (see THE GAUGE DRIVE CIRCUIT CHECK ).



If the fuel gauge needle sweeps from the minimum to maximum position and then returns to
minimum, the gauge is OK. Go to step 4.



If the fuel gauge needle does not sweep correctly, replace the gauge control module and retest.

4. Turn the ignition switch OFF.

5. Remove the rear seat cushion (see REAR SEAT REMOVAL/INSTALLATION ).

6. Remove the access panel (A) from the left side of the floor.

NOTE:

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

2007 Acura RL

2005-08 ENGINE PERFORMANCE Fuel Supply System - RL

Friday, June 05, 2009 3:13:31 PM

Page 53

Fig. 75: Identifying Fuel Pump 5P Connector And Access Panel
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Disconnect the fuel pump 5P connector (B).

8. Remove the fuel tank unit from the fuel tank (see FUEL PUMP/FUEL GAUGE SENDING UNIT

REPLACEMENT ).

9. Measure resistance between the No. 1 and No. 2 terminals of the fuel pump 5P connector with the

float at E (EMPTY), LOW (LOW FUEL INDICATOR), and F (FULL) positions.



If you do not get the following readings, replace the fuel gauge sending unit (see FUEL
PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ).



If the fuel gauge sending unit test is OK, do the secondary fuel gauge sending unit test (see
SECONDARY FUEL GAUGE SENDING UNIT TEST ).

FLOAT POSITION CHART

NOTE:

If the fuel tank is full, drain the fuel (see FUEL TANK DRAINING ).

Float Position

F 1.1 in. (28.9 mm) LOW 4.7 in. (118.1 mm) E 5.7 in. (144.7 mm)

Resistance (ohms)

9 to 11

217.2 to 243

284.1 to 294.1

NOTE:

Remove the No. 15 BACK UP (40 A) fuse from the under-hood
fuse/relay box for at least 30 seconds after completing troubleshooting,
otherwise it may take up to 20 minutes for the fuel gauge to indicate the
correct fuel level.

2007 Acura RL

2005-08 ENGINE PERFORMANCE Fuel Supply System - RL

Friday, June 05, 2009 3:13:31 PM

Page 54

Fig. 76: Measuring Resistance Between No. 1 And No. 2 Terminals Of Fuel Pump 5P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

SECONDARY FUEL GAUGE SENDING UNIT TEST

1. Remove the rear seat cushion (see REAR SEAT REMOVAL/INSTALLATION ).

2. Remove the access panel (A) from the right side of the floor.

Fig. 77: Identifying Secondary Fuel Gauge Sending Unit 5P Connector And Access Panel
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Disconnect the secondary fuel gauge sending unit 5P connector (B).

4. Remove the secondary fuel gauge sending unit from the fuel tank (see SECONDARY FUEL

GAUGE SENDING UNIT REPLACEMENT ).

5. Measure resistance between the No. 1 and No. 2 terminals of the fuel pump 5P connector with the

float at E (EMPTY), 1/2 (HALF FULL), and F (FULL) positions.

FLOAT POSITION CHART

Float Position

F 0.3 in. (7.4 mm) 1/2 6.1 in. (155.9 mm) E 7.7 in. (195.2 mm)

2007 Acura RL

2005-08 ENGINE PERFORMANCE Fuel Supply System - RL

Friday, June 05, 2009 3:13:31 PM

Page 55

Fig. 78: Measuring Resistance Between No. 1 And No. 2 Terminals Of Fuel Pump 5P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

LOW FUEL INDICATOR TEST

1. Do the gauge drive circuit check (see THE GAUGE DRIVE CIRCUIT CHECK ).



If the low fuel indicator flashes, go to step 2.



If the low fuel indicator does not flash, replace the gauge control module assembly.

2. Do multiplex integrated control system troubleshooting test mode A (see TROUBLESHOOTING -

B-CAN SYSTEM DIAGNOSIS TEST MODE A ).



If any DTCs are indicated, go to the indicated DTC's troubleshooting.



If no DTCs are indicated, go to step 3.

3. Do the fuel gauge sending unit test (see FUEL GAUGE SENDING UNIT TEST ), and secondary

fuel gauge sending unit test (see SECONDARY FUEL GAUGE SENDING UNIT TEST ).

Resistance (ohms)

9 to 11

397.6 to 407.6

485.9 to 495.9

NOTE:

Remove the No. 15 BACK UP (40 A) fuse from the under-hood
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.

2007 Acura RL

2005-08 ENGINE PERFORMANCE Fuel Supply System - RL

Friday, June 05, 2009 3:13:31 PM

Page 56

Content .. 533 534 535 536 ..