Section 04 FUEL SYSTEM
Subsection 03 (FUEL TANK AND FUEL PUMP)
529036179
NOTE: Plug only the connector that has been dis-
connected.
BrieflypresstheSTARTbuttontowakeupthe
ECM.
Install the D.E.S.S. key on its post.
Use the
FLUKE 115 MULTIMETER (P/N 529 035 868)
and select Vdc.
Measure the voltage on the installed diagnostic
harness connector as follows.
FUEL TANK
LEVEL
6-PIN
CONNECTOR
OF
DIAGNOSTIC
HARNESS
VOLTAGE
Full 0.14 Vdc
Empty
Pins 2 and
3
2.7 Vdc
smr200
9-030-033_c
NOTE: Voltage could be slightly different depend-
ing on battery voltage but should remain relatively
close to this range. If fuel tank is not full or empty,
the voltage value will be proportional to the fuel
level (somewhere in-between).
If vol
tage is as per specifications the fuel level cir-
cuit a
nd sensor are good. If fuel level does not
work i
n information center, try a new one.
If voltage is out of specifications, perform the
FUEL LEVEL SENSOR RESISTANCE TEST AT
INFORMATION CENTER
as described in this sub-
section.
Remove diagnostic harness and reconnect con-
nector.
Fuel Level Sensor Resistance Test at
Information Center
Disconnect information center (multifunction
gauge) connector. Refer to
GAUGE
subsection.
Use the
FLUKE 115 MULTIMETER (P/N 529 035 868)
and select .
Alternately drain then fill fuel tank and measure
the sensor resistance between pins 19 and 20 as
follows.
RESISTANCE ( ) FLOAT HEIGHT (MM)
4.8 ± 2.2 268.9 ± 3.0 (FULL)
17.8 ± 2.2 240.6 ± 3.0
27.8 ± 2.2 219.1 ± 3.0
37.8 ± 2.2 193.8 ± 3.0
47.8 ± 2.2 161.9 ± 3.0 (HALF)
57.8 ± 2.2 128.3 ± 3.0
67.8 ± 2.2 94.1 ± 3.0
77.8 ± 2.2 60.6 ± 3.0
89.8 ± 2.2 28.8 ± 3.0 (EMPTY)
A. Float height
NOTE: If fuel tank is not full or empty, the resis-
tance value will be proportional to the fuel level
(somewhere in-between).
If readings are as per specifications, the fuel level
circuit and sensor are good. If fuel level does not
work in information center, try a new one.
If readings are out of specifications, perform the
FUEL LEVEL SENSOR RESISTANCE TEST AT
FUEL PUMP
.
Reconnect information center (multifunction
gauge) connector.
Fuel Level Sensor Resistance Test at
Fuel Pump
Disconnect fuel pump module connector.
272 smr2009-031
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