Chrysler 300M 2002 Service Manual page 2093

INSTRUMENT CLUSTER
*FUEL GAUGE NOT OPERATING PROPERLY —
TEST
3 NOTE: Make sure the Fuel Tank is not empty before proceeding.
Turn the ignition on.
Observe the Fuel Gauge.
What does the Fuel Gauge display?
Empty at all times
Between empty and full
Full at all times
4 Turn the ignition off.
Gain access to the body harness connector C308 by removing the rear seat cushion.
Disconnect the C308 harness connector.
Turn the ignition on.
Connect a jumper wire between ground and the Fuel Level Sensor Signal circuit.
With the jumper wire connected to ground, observe the Fuel Gauge.
Does the Fuel Gauge display FULL?
Yes → Remove the Fuel Pump Module from the Fuel Tank. Inspect for a
→ Replace the Instrument Cluster in accordance with the Service
No
5 Turn the ignition off.
Disconnect the BCM C4 harness connector.
Note: To perform this test, add or remove 5 gallons of fuel and take a
measurement, then repeat and take another measurement.
Measure the resistance between ground and the Fuel Level Sensor Signal circuit.
Match the resistance to these specifications (float arm height in mm): 151.4mm
(sensor full stop) - 60+/-10 ohms, 141.0mm (stop on gauge) - 130+/-15 ohms, 105.8mm
(3/4 position) - 340+/-30 ohms.
Continued: match the resistance to these specifications: 74.5mm (1/2 position) -
550+/-30 ohms, 43.0mm (1/4 position) - 760+/-30 ohms, 11.1mm (empty on gauge) -
920+/-30 ohms, 1.4mm (sensor empty stop) - 1050+/-10 ohms.
Does the resistance of the Fuel Pump Module match the resistance specifications
both times?
Yes → Replace the Instrument Cluster in accordance with the Service
→ Go To 6
No
ACTION
Go To 4
Go To 5
Go To 7
stuck float arm. If OK, replace the Fuel Pump Module.
Perform BODY VERIFICATION TEST - VER 1.
Information.
Perform BODY VERIFICATION TEST - VER 1.
Information.
Perform BODY VERIFICATION TEST - VER 1.
Continued
370
APPLICABILITY
All
All
All