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Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 1244
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When Monitored:
Ignition on.
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Set Condition:
The fuel level message that the PCM is receiving is implausible. The circuit is continuously monitored.
Possible Causes
CAN B OPEN OR SHORTED
CLUSTER MODULE
FRONT CONTROL MODULE
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Theory of Operation
The Front Control Module receives a fuel level signal over CAN B from the Cluster Module. Once the message is
received from the FCM, it passages the fuel level message via CAN C to the PCM.
Diagnostic Test
1.
ACTIVE DTC
NOTE: Diagnose all CAN B and C communication failures before continuing.
Ignition on, engine not running.
With a scan tool read DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
U0019-NO COMMUNICATION ON THE CAN B BUS CIRCUIT ALSO ACTIVE
With a scan tool check for DTCs in the FCM.
Is the U0019-NO COMMUNICATION ON THE CAN B BUS CIRCUIT active at this time?
Yes
>> Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for the
U0019-NO COMMUNICATION ON THE CAN B BUS CIRCUIT diagnostic procedures.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
9 - 1000
ENGINE ELECTRICAL DIAGNOSTICS
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