U0423

U0423-IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCN

For a complete wiring diagram Consult Diagrams/Electrical

Theory of Operation

The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The All Wheel Drive (AWD) Control Module verifies that it has received the proper number of bytes for each ID.

- When Monitored:
Continuously with the ignition on, one valid CAN ID received at least once, and no U0002-CAN Bus Off Performance DTC present.

- Set Condition:
When the AWD Control Module detects an incorrect CAN ID from the CLUSTER/CCN.





Diagnostic Test

1. CHECK FOR TIPM CAN BUS DTCS
With the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTCs present?

Yes

- Testing and Inspection category and perform the appropriate symptom.
- Perform AWD Control Module VERIFICATION TEST.AWD Control Module Verification Test.

No

- Go to 2

2. CHECK IF CLUSTER/CCN DTCS ARE PRESENT
With the scan tool, read CLUSTER/CCN DTCs.
Are there any CLUSTER/CCN DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform AWD Control Module VERIFICATION TEST.AWD Control Module Verification Test.

No

- Using the schematics as a guide, check the AWD Control Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the AWD Control Module.
- Perform AWD Control Module VERIFICATION TEST.AWD Control Module Verification Test.