Dodge Durango (HB). Manual — part 207
U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS)
CONTROL MODULE (CONTINUED)
3.
VERIFY THAT THE ABS IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the ABS is active on the bus.
Is the ABS active on the bus?
Yes
>> Go To 4
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for No
Response diagnostic procedures.
Perform BODY VERIFICATION TEST – VER 1.
4.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs “Logged Against” the ABS?
Yes
>> Replace/update the Antilock Brake Module in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Replace/update the module that set this DTC in accordance with the service information
Perform BODY VERIFICATION TEST – VER 1.
HB
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 49
U0141–LOST COMMUNICATION WITH FRONT CONTROL MODULE
8E - 50
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
HB
U0141–LOST COMMUNICATION WITH FRONT CONTROL MODULE (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the ignition on
•
Battery voltage between 10 and 16 volts
•
IOD fuse installed
•
FCM is configured correctly
•
Set Condition:
Bus messages not received from the Front Control Module for approximately 2 to 5 seconds.
Possible Causes
CAN B BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
FRONT CONTROL MODULE
FRONT CONTROL MODULES POWER AND GROUND
MODULE THAT SET THIS DTC
Diagnostic Test
1.
VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
With the scan tool, read active DTCs.
Is this DTC active?
Yes
>> Go To 2
No
>> Refer to the Stored Lost Communication test procedure. Refer to the table of contents in this section.
Perform BODY VERIFICATION TEST – VER 1.
2.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read all active DTCs from all modules.
NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or igni-
tion related DTCs.
Does the scan tool display any active DTCs to the conditions listed above?
Yes
>> Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Go To 3
HB
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 51
U0141–LOST COMMUNICATION WITH FRONT CONTROL MODULE (CONTINUED)
3.
VERIFY THAT THE FCM IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the FCM is active on the bus.
Is the FCM active on the bus?
Yes
>> Go To 4
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for No
Response diagnostic procedures.
Perform BODY VERIFICATION TEST – VER 1.
4.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs “Logged Against” the FCM?
Yes
>> Replace/update the Front Control Module in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Replace/update the module that set this DTC in accordance with the service information
Perform BODY VERIFICATION TEST – VER 1.
8E - 52
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
HB
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