Dodge Durango (HB). Manual — part 284
HB
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 83
U0019–CAN B BUS – HSM
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
Whenever the Can B Bus (+) or B Bus (–) circuit is open, shorted to voltage or shorted to ground, this
code will set.
Possible Causes
CAN B BUS DTC’s IN FRONT CONTROL MODULE
(D54) CAN B BUS (–) CIRCUIT OPEN
(D55) CAN B BUS (+) CIRCUIT OPEN
HEATED SEAT MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTC’s.
Does the scan tool display U0019 CAN B BUS CIRCUIT?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not
present at this time. Using the wiring diagram/schematic
as a guide, inspect the wiring and connectors.
2.
CHECK FRONT CONTROL MODULE DTC’s
With the scan tool, read Front Control Module DTC’s
Does the scan tool display any CAN B BUS DTC’s – ACTIVE?
Yes
>> Refer to the symptom list for problems related to Commu-
nication in the ELECTRICAL.– ELECTRONIC CONTROL
MODULES – ELECTRICAL DIAGNOSES section.
No
>> Go to 3
8G - 84
HEATED SEATS - ELECTRICAL DIAGNOSTICS
HB
U0019–CAN B BUS – HSM —
(CONTINUED)
3.
CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Heated Seat Module connector.
Disconnect the Front Control Module C1 connector.
Measure the resistance of the (D55) Can B Bus (+) circuit between
the Front Control Module C1 connector and the Heated Seat Module
connector.
Is the resistance below 2.0 ohms?
Yes
>> Go To 4
No
>> Repair the Can B Bus (+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4.
CAN B BUS (–) CIRCUIT OPEN
Measure the resistance of the (D54) Can B Bus (–) circuit between
the Front Control Module C1 connector and the Heated Seat Module
connector.
Is the resistance below 2.0 ohms?
Yes
>> Replace the Heated Seat Module.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Repair the Can B Bus (–) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
HB
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 85
U0019–CAN B BUS – HSM —
(CONTINUED)
Diagnostic Test
1.
Perform Body Verification Test
Disconnect all jumper wires and reconnect all previously disconnected
components and connectors.
Ensure that all accessories are turned off.
Ensure that the battery is fully charged.
Turn the ignition on.
With the scan tool, record and erase DTCs from all modules.
If repairs were made to any of the HVAC door actuator circuits, with
the scan tool in HVAC, select System Tests and then select Actuator
DTC Detection. The test must pass before proceeding to the next
step.
If repairs were made to any of the HVAC doors, linkage, door actua-
tors, or door actuator circuits, with the scan tool in HVAC, select Sys-
tem Tests and then select Actuator Calibration Test. The test must
pass before proceeding to the next step.
Turn the ignition off, wait 10 seconds, and then turn the ignition on.
Operate all functions of the system that caused the original concern.
With the scan tool, select ECU View.
Check for DTCs in the modules.
Are DTCs present in any of the modules or is the original con-
dition still present?
Yes
>> The repair is not complete. Refer to the related category
for the DTC or symptom that is still present.
No
>> The repair is complete.
8G - 86
HEATED SEATS - ELECTRICAL DIAGNOSTICS
HB
BODY VERIFICATION TEST – VER 1
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