U114713

Code

VOLVO U — Network/User

Parking Heater Air Outlet Temperature Sensor. Circuit Open

Brand: VOLVO

Type: U — Network/User

Views: UK: 24 EN: 40 RU: 24

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Page language: EN

Read and record freeze-frame/fault details and any related codes with a capable Volvo scanner
Visually inspect heater unit, sensor connector, and wiring harness for damage, corrosion, or water ingress
Check related fuses and power/ground circuits for the heater/control module
Backprobe sensor connector and measure voltage/resistance with key ON (see signal parameters)
Wiggle wiring and connectors while monitoring live data to reproduce the fault
Check for lost CAN or module communication codes that could affect temperature reporting

Sensor type: typically an NTC thermistor (negative temp coefficient) — resistance decreases as temperature rises
Typical operating temperature span: approx. -40°C to +125°C (sensor dependent)
Expected resistance range: depends on sensor design (common values ~2 kΩ–100 kΩ at 25°C); consult OEM spec before replacement
Expected voltage at module (via divider): normally ≈0.1–4.8 V across the temperature range; open-circuit often shows >4.9–5.0 V or no change, short shows ≈0.0–0.2 V
Communication: module should show valid temperature value on CAN/FH-bus when sensor OK (verify with scanner)

Connect diagnostic scanner; record U114713 and any related codes and freeze frame data
Perform visual inspection of parking heater, sensor and harness for physical damage, corrosion, or water ingress
Locate the air outlet temperature sensor connector. With ignition ON (do not start the engine or heater if instructed by OEM), backprobe the sensor pins and measure voltage across the sensor wiring — compare to expected range in the service manual
If voltage indicates open/over-voltage, disconnect sensor and measure resistance of sensor itself at ambient temperature; compare to OEM resistance table (if sensor reads infinite/OL, sensor is open)
If sensor resistance is correct, probe harness at module connector for continuity/voltage while moving harness to check for intermittent open — repair broken wires or pins as needed
Check fuses, module power and ground circuits. Repair any faults and re-check
If wiring and sensor are good but module sees no valid signal, check CAN/communication integrity and other modules for related errors
If fault persists after wiring and sensor confirmed good, consider replacing parking heater control module or sending module for testing (follow OEM procedures)
Clear codes and perform operational test of parking heater; verify no reoccurrence and that live temperature values are reported

⚠️ Status

Parking heater air outlet temperature sensor — circuit open (no sensor signal detected).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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