Fuel Gauge Test - Honda 2004 Odyssey Service Manual

Fuel Gauge Test

NOTE: For the fuel gauge system circuit diagram, refer
to the Gauges Circuit Diagram (see page 22-96).
1. Check the No. 9 BACK UP LIGHT INSTRUMENT
LIGHT (7.5A) fuse in the driver's under-dash fuse/
relay box before testing.
2. Turn the ignition switch OFF.
3. Remove the rear seats and carpet.
4. Remove the access panel from the floor (see page
11-223).
5. Disconnect the fuel pump 5P connector.
6. Measure voltage between fuel pump 5P
connector terminals No. 1 and No. 2 with the
ignition switch ON (II). There should be between
5 and 8 V (about 5V on '03-04 models).
• If the voltage is as specified, go to step 9.
• If the voltage is not as specified, go to step 7.
FUEL PUMP 5P CONNECTOR
(BLK)
Wire side of female terminals
7. Turn the ignition switch OFF. Check for continuity
between fuel pump 5P connector terminal No. 1
and body ground. There should be continuity.
• If there is contiuity, go to step 8.
• If there no continuity, check for an open in the
BLK wire or a poor ground (G551).
FUEL PUMP 5P CONNECTOR
(BLK)
Wire side of female terminals
(YEL/BLU)
8. Measure voltage between gauge assembly 16P
connector terminal No. 11 and body ground with
the ignition switch ON (II). There should be
between 5 and 8 V.
• If the voltage is as specified, check for an open in
the YEL/BLU wire.
• If the voltage is not as specified, replace the
gauge assembly.
GAUGE ASSEMBLY 16P CONNECTOR
Wire side of female terminals
9. Turn the ignition switch OFF.
10. Install a 2 resistor between fuel pump 5P
connector terminals No. 1 and No. 2, then turn the
ignition switch ON (II).
FUEL PUMP 5P CONNECTOR
2 RESISTOR
(BLK)
Wire side of female terminals
11. Check that the pointer of the fuel gauge starts
moving toward the ''F'' mark.
• If the pointer of the fuel gauge does not move at
all, replace the gauge.
• If the gauge is OK, inspect the fuel gauge sending
unit (see page 11-234).
NOTE: The pointer of the fuel gauge returns to the
bottom on the gauge dial when the ignition switch
is OFF, regardless of the fuel level.
(YEL/BLU)
(YEL/ BLU)
11-233