U041E

Code

Generic U — Network/User

Invalid Data Received From All Wheel Drive Control Module

Brand: Generic

Type: U — Network/User

Views: UK: 30 EN: 74 RU: 28

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty AWD control module
Loss of or intermittent CAN/LIN communication between AWD module and other modules
Corroded, loose, or damaged connector or wiring to AWD module
Low or no module supply voltage or bad ground
Software mismatch or failed module programming
Electrical noise or bus contention (multiple nodes driving the bus)

Symptoms

AWD/4WD indicator or warning lamp illuminated
Traction control, stability or ABS warnings may also appear
Loss of AWD engagement or vehicle stuck in a default (2WD) mode
Reduced engine/drive performance or limp-home mode triggered by other modules
Inconsistent or no AWD status shown on dash or vehicle info screens
Intermittent operation of AWD-related components

What to check

Read and record all stored and pending DTCs from all modules (scan tool), and view freeze-frame data
Check for other network U-codes (lost comms, invalid data from other modules)
Visually inspect AWD module connector(s) for corrosion, bent pins, or water intrusion
Check battery voltage at key on and cranking; verify module supply voltage and ground(s)
Measure CAN High/CAN Low voltages at the AWD module and at other nodes with ignition on
Check network termination resistance (approx. 60 ohms across CAN H/ L with key off)

Signal parameters

AWD module supply voltage: ~11–14.5 V (key on)
Ground resistance:
CAN bus idle voltages: CAN_H ≈ 2.5–3.5 V, CAN_L ≈ 1.5–2.5 V (key on, no traffic conditions vary)
Differential CAN voltage during traffic: ~2.0–3.0 V peak-to-peak
Termination resistance: ~60 ohms measured across CAN_H and CAN_L (key off)
AWD commanded torque split: 0–100 % (percent front/rear output)

Diagnostic algorithm

Connect a capable scan tool and read all modules. Save codes and freeze-frame. Note time/conditions when code set.
Attempt to communicate with AWD control module via scan tool. Confirm module presence and ability to read live data.
Clear codes and reproduce conditions by cycling ignition and exercising drivetrain (drive at safe low speed if required). Observe whether U041E returns and under what conditions.
If module is not present on the bus or intermittently present, inspect AWD module connector for corrosion, water, or damaged pins. Repair or reseal as needed.
Verify power and ground: measure supply voltage at AWD module connector with key on and engine off, and measure ground continuity to chassis. Repair poor power/ground.
Check CAN bus health: measure CAN_H and CAN_L at the AWD module and at another known-good node. Compare voltages, check differential during traffic, and confirm termination resistance ~60 ohms across H/L with key off.
Perform a wiggle test and stress the harness to identify intermittent faults while monitoring live CAN traffic and code status.
If wiring and power/ground check OK, check for bus contention (multiple nodes transmitting). Disable suspected aftermarket devices and retest.
Verify module software/part number and recent service history. Reflash or reprogram module if a software mismatch or corruption is suspected (follow OEM procedure).
If module fails bench communications or patterns consistent with internal failure persist after wiring and power checks, consider replacement of the AWD control module. Reprogram/configure as required after replacement.
After repairs, clear codes and perform a final road test and network scan to confirm no reoccurrence.

Likely causes

Open or shorted CAN High/CAN Low wiring to AWD module
Poor ground at AWD module or shared ground point corrosion
Module is in a bus-off or sleep state due to internal fault
Module firmware incompatible after replacement or update
Intermittent connector pin or terminal failure (moisture corrosion)
Short to battery or ground on a signal or power circuit

Fault status

⚠️ Status

Invalid Data Received From All Wheel Drive Control Module — AWD messages are missing, out of range, or fail integrity checks; communication or module fault suspected.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours