Honda Prelude 1993 Service Manual page 1218

Fuel Gauge
Sending Unit Test
@
Do not smok€ whils working on ths fuol
systom. Ko6p open flame away flom th€ work aroa.
1. Open the lrunk.
2. Remove the fuel tank access panel-
3. With the ignition switch OFF. disconnect the 5-P
connector from the fuel gauge sending unit.
4. Remove the five nuts. then take the sending unit
assembly out of the fuel tank,
Measure the resistance between the A and B
terminals.
a It it is more than about 27O-33O O, reDlace the
tuel sending unit.
. lf it is within about 27O-33O O, go to step 6.
23-140
b .
Check the resistance between the B and C ter-
minals. lt should change evenly as you change the
position of the tloat.
a lf it does not change evenly, replace the fuel
sending unit.
a lf it changes evenly, go to step 7.
Support the sending unit on a workbench in the
position shown.
Top ot tho wortb.nch
(Bottom ol tho tuel tank)
8. Measure the resistance between the B and C ter-
minals by moving the float to the distances listed
Jor E (EMPTY), 1/2 (HALF FULL). and F (FULLl.
9. lf unable to obtain the above readings, replace the
fuel gauge sending unit.
7 .
Float Position
E 1 t 2
F
Resistance lO)
1 6 - 3 2
1 1 6 - 1 8 8
2 3 9 - 3 1 4
E F
2 0 . 5 m m
( O . 8 0 i n )
7 3 . 6 m m
( 2 . 9 0 i n )
1 2 6 m m
l'4.7 inl