U0219

Code

Generic U — Network/User

Lost Communication With Door Switch E

Brand: Generic

Type: U — Network/User

Views: UK: 24 EN: 37 RU: 27

AI status

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Page language: EN

Door open/closed indicator incorrect or absent for that door
Central locking or power door functions not working for the affected door
Dome/programmable lighting or alarm related to that door behaves incorrectly
Scan tool shows U0219 for Door Switch E; possibly other network-related U-codes present
Intermittent or no communication with the specific door module when monitored

Connect a scan tool and confirm active and historic U0219 code and any additional U-codes
Check for presence of the door switch/module identifier on the network (module list) with a scan tool
Visually inspect door wiring harness, pins and connector for corrosion, bent pins, or damage
Verify module power and ground at the connector with key on (check fuses first)
Measure CAN/LIN bus voltages at the module connector and at a known-good location on the same bus
Check for proper bus termination resistance (~60 ohms across CAN_H and CAN_L for a two-terminator CAN network)

Battery supply (Vbatt) at module: ~11–14.5 V (engine off/on)
Ground: near 0 V with good continuity to chassis
CAN/LIN idle (recessive) common-mode voltage: ~2.5 V
CAN dominant levels (when active): CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (voltage difference ~2 V during dominant)
Termination resistance: ~60 ohms measured between CAN_H and CAN_L across the network (two 120 ohm terminators in parallel)
Logic/input to body controller/door switch: typically 0 V (low) or battery voltage (high) depending on design — verify with OEM data

Verify the code: read freeze frame and related U-codes; note conditions when code set (ignition state, door position).
Check for other modules reporting comms losses — helps locate bus-wide vs single-node issue.
Inspect the door harness and connector for damage, corrosion, pin push-out, or water ingress. Repair as needed.
With key on, confirm Vbatt and ground at the door switch/module connector and relevant fuses; replace or repair any blown fuses or open power/ground circuits.
Measure CAN/LIN signals at the module connector and at another known-good point on the same bus using a multimeter and preferably an oscilloscope. Look for missing or noisy data, stuck levels, or shorts.
Check bus termination resistance between CAN_H and CAN_L (≈60 ohms). If abnormal, isolate segments or disconnect suspected modules one at a time to find a faulted node.
Wiggle test wiring (safely) while monitoring communications to detect intermittent opens or shorts. Avoid causing shorts — use insulated tools and proper probes.
If wiring, power and bus checks pass, try reprogramming or resetting the module/gateway per OEM procedure. Reflash or update software if a known issue exists.
If problem persists after verifying wiring and power, replace the door switch/module only after confirming replacement is necessary and re-run communications tests.
Clear codes and road-test or cycle doors to verify proper operation and that U0219 does not return.

CAN bus shorted to battery or ground near the door module
Broken/loose connector pins at the door harness or module
Door switch/module lost Vbatt or ground due to blown fuse or damaged wire
Control module internal failure (board/component fault)
Other module driving the gateway has a software fault or is not relaying messages