U0431

U0431-IMPLAUSIBLE DATA RECEIVED FROM FCM (TIPM)

For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

- When Monitored:
With the ignition on for Four seconds, no CAN BUS circuit error condition present, no lost communication with FCM condition present, and no system undervoltage or overvoltage condition present.

- Set Condition:
The Final Drive Control Module (FDCM) is receiving no message or implausible data for ambient temperature or the transfer case selector switch.





1. DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the Final Drive Control Module.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 5

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS

NOTE: Check for TIPM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

1. With the scan tool, read all active DTCs from the TIPM and CCN.

Does the scan tool display any active DTCs to the conditions listed above?

Yes

- Perform the appropriate diagnostic procedure Testing and Inspection or Testing and Inspection

No

- Go To 3

3. AMBIENT TEMPERATURE SENSOR
1. With the scan tool, monitor the ambient temperature in the Totally Integrated Power Module (TIPM).

Is the ambient temperature at room temperature?

Yes

- Go To 4

No

- Replace the Ambient Temperature Sensor.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

4. TRANSFER CASE SELECTOR SWITCH
With the scan tool, monitor the voltages of the transfer case selector switch positions in the CCN.






Are the voltages of the transfer case selector switch within the specified ranges?

Yes

- Replace the Final Drive Control Module (FDCM).
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Replace the Transfer Case Selector Switch.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

5. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

- Repair as necessary.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Test complete.