Dodge Dakota (ND). Manual — part 326

U0019–CAN B BUS (CONTINUED)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Continuously.

•

Set Condition:
Whenever the Can B Bus (+) or Can 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

ELECTRONIC OVERHEAD 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/sche-

matic as a guide, inspect the wiring and connectors.

Perform the BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)

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 Communication in the ELECTRICAL.– ELECTRONIC

CONTROL MODULES – ELECTRICAL DIAGNOSES section.

No

>> Go to 3

8M - 10

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

ND

U0019–CAN B BUS (CONTINUED)

3.

CAN B BUS (+) CIRCUIT OPEN

Turn the ignition off.

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 the BODY VERIFICATION TEST-VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

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 Electronic Over-
head Module harness connector.

Is the resistance below 2.0 ohms?

Yes

>> Replace the Electronic Overhead Module.

Perform the BODY VERIFICATION TEST-VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

No

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

Perform the BODY VERIFICATION TEST-VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

ND

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

8M - 11

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 - 12

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

ND

SCHEMATICS AND DIAGRAMS

ND-EOM

SYSTEM

SCHEMA

TIC

ND

OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS

8M - 13