Diesel

U0423-IMPLAUSIBLE DATA RECEIVED FROM CCN

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Continuously while the system is active.

- Set Condition:
An error message has been received over the bus from the Cabin Compartment Node/Cluster (CCN).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. ACTIVE DTC
NOTE: Diagnose all CAN B and C communication DTCs before continuing.

Ignition on, engine not running.
With a scan tool, view DTCs.
Is the status Active for this DTC?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure.

2. CCN COMMUNICATION RELATED DTC'S IN OTHER MODULES
With a scan tool check for CCN communication related DTCs in other modules on the CAN Bus.
Are there any CCN communication related DTCs in other modules on the CAN Bus at this time?

Yes

- Replace and program the Cabin Compartment Node/Cluster (CCN).
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Replace and program the Engine Control Module (ECM).
- Perform the ECM Verification Test Ver. 1. Verification Tests