B0244

Code

Generic B — Body

Driver Door Module Communication Fault

Brand: Generic

Type: B — Body

Views: UK: 26 EN: 23 RU: 23

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Page language: EN

Driver door functions inoperative or intermittent (power windows, power locks, mirror adjustment)
Warning or communication messages on cluster or infotainment display
Door ajar or module-related fault lamp illuminate
Certain door-related switches not responding or incorrect operation
Other modules reporting loss of communications with DDM

Scan vehicle networks and read freeze frame and related U/B codes for bus issues
Check battery voltage and ground quality at the DDM with a multimeter
Inspect fuses and fusible links related to door electronics
Visually inspect DDM connector and harness for corrosion, bent pins, or water intrusion
Perform wiggle test on door harness (at hinge boots) while monitoring communication status
Measure continuity and resistance of the wiring between the DDM and nearest gateway or junction

CAN bus: message ID for DDM present at expected frequency (messages/sec)
CAN bus differential voltage: ~2.5V recessive, dominant transitions to proper levels (vehicle dependent)
LIN bus voltage and header pulse presence (if DDM uses LIN)
Module supply voltage (IGN ON): ~12V (within manufacturer tolerance)
Ground resistance: low (
Diagnostic response: DDM should respond to CAN diagnostic request (tester present/absent)

Retrieve trouble code with a scan tool and note any related network codes (U-codes, other B-codes). Record freeze frame and occurrence history.
Verify battery voltage and ground at the DDM connector. Check and replace any blown fuses related to door electronics.
Visually inspect the door harness, hinge boot, and DDM connector for damage, corrosion, moisture or loose pins. Repair or replace damaged connectors.
With a scan tool, observe live data: check for DDM messages on the CAN/LIN bus and whether other modules see the DDM. Perform a wiggle test of the harness while monitoring for code set/clear or message loss.
If no messages are present, measure continuity between the DDM and the gateway or junction block for CAN H/L (or LIN) and for power/ground. Repair any opens/shorts.
Check CAN/LIN bus integrity: measure bus voltages and, if available, capture waveforms to confirm proper signaling and termination. Repair bus faults as needed.
If wiring and bus are good, check for correct module programming/version. Reflash or reprogram the DDM per manufacturer procedure if required.
If programming does not restore communication, bench-test or replace the DDM and confirm communication is restored. Reconfigure or code new module per service procedures.
After repair, erase codes and perform functional test of driver door features and verify no recurrence of B0244.