Jeep Liberty KJ. Manual — part 1461
4.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs “Logged Against” the SAS?
Yes
>> Replace/update the Steering Angle Sensor (internal to the clockspring) in accordance with the service
information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Replace/update the module that set this DTC in accordance with the service information
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
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*STORED LOST COMMUNICATION DTCS
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTIC
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•
When Monitored:
•
With the ignition on
•
Battery voltage between 10 and 16 volts
•
IOD fuse installed
•
Set Condition:
Bus messages not received from for approximately 500ms.
Possible Causes
CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
POWER OR GROUND FROM THE REPORTING MODULE
MODULE THAT SET THIS DTC
PREVIOUS SERVICE PERFORMED WITHIN THE LAST 100 KEY CYCLES (FUSE/RELAYS REMOVED, WIRING
SERVICE, BATTERY DISCONNECT)
LOW BATTERY/JUMP START CONDITION
IOD FUSE WAS REMOVED DURING SHIPPING
CHECK FOR RELATED TSBS
Diagnostic Test
1.
VERIFY DTC IS STORED
NOTE: Stored faults may indicate a customer perceived intermittent condition.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
Turn the ignition on.
With the scan tool, read stored DTCs.
Is this DTC stored?
Yes
>> Go To 2
No
>> Diagnose the active DTC. Refer to the table of contents for a list of the symptoms.
2.
CHECK THE ENVIRONMENTAL DATA
With the scan tool, read the loss of communication environmental data.
Does the loss of communication environmental odometer data match up to any of the previous service
procedures listed in the possible causes or are their any stored CAN C hardware electrical, battery,
ignition voltage, VIN missing/mismatch DTCs present which match environmental data?
Yes
>> These DTCs may have been the result of other service procedures performed. Clear DTCs.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Go To 3
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3.
VERIFY INTERMITTENT LOST COMMUNICATION DTC-WIRING CONCERNS
With the scan tool, select Network View and select Advanced.
Is there more than one ECU with stored DTCs “Logged Against” the module and one or more lost
communication DTCs stored in the offending module?
Yes
>> Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring
harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for
broken, bent, pushed out, and corroded terminals. Repair as necessary.
No
>> Go To 4
4.
VERIFY INTERMITTENT LOST COMMUNICATION DTC-OFFENDING MODULE
With the scan tool, select Network View and select Advanced.
Is there more than one ECU with stored DTCs “Logged Against” the module and NO lost communica-
tion DTCs stored in the offending module?
Yes
>> Check for a TSB related to this offending module.
No
>> Go To 5
5.
VERIFY INTERMITTENT LOST COMMUNICATION DTC-REPORTING MODULE
With the scan tool, select Network View and select Advanced.
Is there ONLY ONE ECU with stored DTCs “Logged Against” the module?
Yes
>> Check for a TSB related to the module that set this DTC.
No
>> Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring
harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for
broken, bent, pushed out, and corroded terminals. Repair as necessary.
KJ
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTIC
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