Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 570
•
When Monitored:
Continuously.
•
Set Condition:
If the Can B Bus (+) or B Bus (–) circuit is open, shorted to voltage, or shorted to ground.
Possible Causes
CAN B BUS DTCs IN FRONT CONTROL MODULE
(D55) CAN B BUS (+) CIRCUIT OPEN
(D54) CAN B BUS (–) CIRCUIT OPEN
ELECTRONIC OVERHEAD MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC U0019–CAN B BUS
Turn the ignition on.
With the scan tool, record and erase any Electronic Overhead Module DTCs.
Turn the ignition off, wait 30 seconds then turn the ignition on.
With the scan tool, read DTCs.
Is DTC U0019–CAN B BUS active?
Yes
>> Go To 2
No
>> The condition that caused this code to set is not present at this time. Check for an intermittent condition
by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also
inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated termi-
nals.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).
2.
CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE
With the scan tool, read Front Control Module DTCs
Does the scan tool display any active CAN B BUS related DTCs?
Yes
>> Diagnose and repair the DTC(s). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
DIAGNOSIS AND TESTING)
No
>> Go to 3
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OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS
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3.
CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the negative battery cable.
Disconnect the Electronic Overhead Module harness connector.
Disconnect the Front Control Module C1 harness connector.
Measure the resistance of the (D55) Can B Bus (+) circuit between the
Front Control Module C1 harness connector and the Electronic Over-
head Module harness 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. (Refer to
BODY VERIFICATION TEST - VER 1).
4.
CHECK THE (D54) CAN B BUS (–) CIRCUIT FOR AN OPEN
Measure the resistance of the (D54) Can B Bus (–) circuit between the
Front Control Module C1 harness connector and the Electronic Over-
head Module harness connector.
Is the resistance below 2.0 ohms?
Yes
>> Replace the Electronic Overhead Module in accordance
with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Repair the Can B Bus (–) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
LX
OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS
8M - 151
U0141–LOST COMMUNICATION WITH FRONT CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0151-LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0154-LOST COMMUNICATION WITH OCCUPANT CLASSIFICATION MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0155-LOST COMMUNICATION WITH CLUSTER/CCN
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0159-LOST COMMUNICATION WITH PARKING ASSIST CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0167-LOST COMMUNICATION WITH INTRUSION TRANSCEIVER CONTROL
MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE
(SKREEM/WCM)
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0169-LOST COMMUNICATION WITH SUNROOF CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
8M - 152
OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS
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(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0184-LOST COMMUNICATION WITH RADIO
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0186-LOST COMMUNICATION WITH AUDIO AMPLIFIER
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0195-LOST COMMUNICATION WITH SDARS
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0196-LOST COMMUNICATION WITH VEHICLE ENTERTAINMENT CONTROL
MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0197-LOST COMMUNICATION WITH HANDS FREE PHONE MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0199-LOST COMMUNICATION WITH DRIVER DOOR MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0200-LOST COMMUNICATION WITH PASSENGER DOOR MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0208-LOST COMMUNICATION WITH HEATED SEAT CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
LX
OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS
8M - 153
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