Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 362
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When Monitored:
When the scan tool queries the FCM.
•
Set Condition:
The scan tool has detected an open condition on the (D71) CAN C Diagnostic (-) circuit.
Possible Causes
(D71) CAN C DIAGNOSTIC (-) CIRCUIT OPEN
FRONT CONTROL MODULE
Diagnostic Test
1.
CHECK THE STATUS OF THE ERROR MESSAGE
NOTE: Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be dis-
played.
NOTE: Ensure the scan tool is updated to the latest software.
With the scan tool, record the error message.
Disconnect the scan tool from the DLC.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
Does the scan tool display this same error message?
Yes
>> Go To 2
No
>> The conditions that caused this error message to set are not present at this time. Using the wiring dia-
gram/schematic as a guide, inspect the wiring and connectors.
2.
(D71) CAN C DIAGNOSTIC (-) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Front Control Module C1 harness connector.
Disconnect the scan tool from the DLC.
Measure the resistance of the (D71) CAN C Diagnostic (-) circuit
between the FCM connector and the DLC.
Is the resistance below 5.0 ohms?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Front Control Module in accor-
dance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Repair the (D71) CAN C Diagnostic (-) circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
8E - 138
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
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