Jeep Grand Cherokee WK. Manual — part 321
U0208-LOST COMMUNICATION WITH HEATED SEAT 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 HSM 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
HEATED SEAT MODULE POWER AND GROUND
HEATED SEAT MODULE
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.
2.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read 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.
No
>> Go To 3
3.
VERIFY THAT THE HSM IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the HSM is active on the bus.
Is the HSM active on the bus?
Yes
>> Go To 4
No
>> Refer to the Table of Contents located in this section for a no response test procedure.
8E - 130
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
WK
U0208-LOST COMMUNICATION WITH HEATED SEAT CONTROL MODULE (CONTINUED)
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 HSM?
Yes
>> Replace/update the Heated Seat Module 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 the appropriate VERIFICATION TEST.
WK
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 131
U0209-LOST COMMUNICATION WITH MEMORY SEAT CONTROL MODULE
8E - 132
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
WK
U0209-LOST COMMUNICATION WITH MEMORY SEAT 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 MSMD 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
MEMORY SEAT MODULE POWER AND GROUND
MEMORY SEAT MODULE
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.
2.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read 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.
No
>> Go To 3
3.
VERIFY THAT THE MSMD IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the MSMD is active on the bus.
Is the MSMD active on the bus?
Yes
>> Go To 4
No
>> Refer to the Table of Contents located in this section for a no response test procedure.
WK
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 133
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