Dodge Durango (HB). Manual — part 366

HB

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

8M - 17

U0019–CAN B BUS

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 DTCs IN FRONT CONTROL MODULE

(D54) CAN B BUS (–) CIRCUIT OPEN

(D55) CAN B BUS (+) CIRCUIT OPEN

COMPASS TEMPERATURE MODULE

Diagnostic Test

1.

TEST FOR INTERMITTENT CONDITION

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.

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.

Perform 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 any CAN B BUS DTCs – 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

8M - 18

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

HB

U0019–CAN B BUS —

(CONTINUED)

3.

CAN B BUS (+) CIRCUIT OPEN

Turn the ignition off.

Disconnect the Compass Temperature 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 Compass
Temperature Module harness connector.

Is the resistance below 2.0 ohms?

Yes

>> Go To 4

Perform BODY VERIFICATION TEST - VER 1.

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 harness connector and the Compass
Temperature Module harness connector.

Is the resistance below 2.0 ohms?

Yes

>> Replace the Compass Temperature Module.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Repair the Can B Bus (–) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

HB

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

8M - 19

U0019–CAN B BUS —

(CONTINUED)

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.

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.

U0212-LOST COMMUNICATION WITH SCCM

For a complete wiring diagram Refer to Section 8W.

(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
DIAGNOSIS AND TESTING) for the diagnostic test procedure.

8M - 20

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

HB