Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 484

U0019–CAN B BUS

For a complete wiring diagram Refer to Section 8W.

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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS

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•

When Monitored:
With the Instrument Cluster awake.

•

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 DTCs IN FRONT CONTROL MODULE

(D54) CAN B BUS (–) CIRCUIT OPEN

(D55) CAN B BUS (+) CIRCUIT OPEN

INSTRUMENT CLUSTER

Diagnostic Test

1.

CHECK FOR AN ACTIVE DTC

Turn the ignition on.

With the scan tool, record and erase DTCs.

Cycle the ignition from on to off 3 times.

Turn the ignition on.

With the scan tool, read DTCs.

Is the DTC 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 FRONT CONTROL MODULE DTCs

With the scan tool, read Front Control Module DTCs.

Does the scan tool display the U0019–CAN B BUS DTC?

Yes

>> Refer to the symptom list for problems related to Communication in the ELECTRICAL.– ELECTRONIC

CONTROL MODULES – ELECTRICAL DIAGNOSES section.

No

>> Go to 3

Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).

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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS

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3.

CAN B BUS (+) CIRCUIT OPEN

Turn the ignition off.

Disconnect the Instrument Cluster C1 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 Instrument Cluster
C1 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.

CAN B BUS (–) CIRCUIT OPEN

Measure the resistance of the (D54) Can B Bus (–) circuit between the
Front Control Module C1 harness connector and the Instrument Cluster
C1 harness connector.

Is the resistance below 2.0 ohms?

Yes

>> Replace the Instrument Cluster in accordance with the ser-

vice 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).

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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS

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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.

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.

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.

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.

U0197-LOST COMMUNICATION WITH HANDS FREE PHONE MODULE

For a complete wiring diagram Refer to Section 8W.

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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS

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