Electronically Controlled Clutch (ECC)

U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM

For a complete wiring diagram Refer to Diagrams/Electrical Electrical Diagrams


- When Monitored:

Continuously with the ignition on, one valid CAN message received at least once, and no U0002-CAN C Bus Off Performance DTC present.

- Set Condition:

When the AWD Control Module detects an incorrect CAN message from the Power Control Module (PCM).








Diagnostic Test


1. CHECK FOR DTC U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, record and erase DTC's.

Cycle the ignition switch from off to on.

With the scan tool, read DTC's.

Does the scan tool display: U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION diagnostic procedure. ABS Intermittent Condition Test
- Perform AWD Control Module VERIFICATION TEST. AWD Control Module Verification Test



Diagnostic Test


2. CHECK IF TIPM CAN BUS DTC'S ARE PRESENT

With the scan tool, read TIPM DTCs.

Are there any TIPM CAN BUS DTC's present?

Yes

- Refer to Communications and diagnose the appropriate symptom.
- Perform AWD Control Module VERIFICATION TEST. AWD Control Module Verification Test

No

- Go To 3



3. CHECK IF ENGINE DTC'S ARE PRESENT

With the scan tool, read Engine DTCs.

Are there any Engine DTC's present?

Yes

- Refer to the appropriate symptom.
- 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