Chrysler Concorde 2004 Service Manual page 932

DRIVEABILITY - NGC
Symptom:
P1681-NO FUEL LEVEL BUS MESSAGE
When Monitored and Set Condition:
P1681-NO FUEL LEVEL BUS MESSAGE
When Monitored: Ignition on.
Set Condition: No fuel level BUS messages received by the PCM for 20 seconds.
DTC RESET
COMMUNICATE WITH BCM
FUEL LEVEL BUS MESSAGE
PCI BUS CIRCUIT OPEN FROM PCM TO BCM
BCM
TEST
1 NOTE: If a fuel level circuit or performance DTC is set along with P1681,
diagnose the circuit/performance DTC before continuing.
Turn the ignition on.
With the DRBIII , erase DTCs.
Start the engine on and off several times. Leave the engine running for at least 20
second each time.
With the DRBIII , read DTCs.
Does the DTC reset?
Yes → Go To 2
No
2 Ignition on, engine not running.
With the DRBIII , attempt to communicate with the BCM.
Can communication be established with the BCM?
Yes → Go To 3
No
3 Turn the ignition on.
Using the DRBIII , read the Fuel Level parameter in the PCM.
Does the DRBIII display a fuel level value?
Yes → Replace and program the Powertrain Control Module in accor-
No
POSSIBLE CAUSES
ACTION
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
→ Refer to the Communication Category and perform the appropri-
ate symptom related to no communication with BCM.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
→ Go To 4
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APPLICABILITY
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