| No. | Part No. | Name |
|---|---|---|
| 1 | WG9925583004 | Ambient Temperature Sensor |
The Ambient Temperature Sensor is a precision NTC thermistor housed in a protective probe, mounted on the front grille or mirror bracket of the Sitrak C7H. It measures the outside air temperature with an accuracy of ±0.5°C across a range of -40°C to +85°C.
This sensor provides critical data for the automatic climate control system, allowing the HVAC unit to adjust cabin temperature settings based on external conditions. It also displays the ambient temperature on the instrument cluster and infotainment screen.
The sensor features a robust automotive‑grade connector (TE Connectivity) and a weather‑sealed housing that resists moisture, salt, and vibration. Its fast response time (under 5 seconds) ensures real‑time updates when the vehicle enters different climate zones.
Installation is a simple plug‑and‑play operation – locate the original sensor on the front panel, disconnect the harness, and install the new unit. No calibration or programming is required, as the sensor outputs a linear voltage signal interpreted by the VCU.
This Ambient Temperature Sensor is manufactured to Sinotruk’s stringent quality standards, using materials that withstand UV exposure and thermal cycling. It is tested for over 10,000 hours of continuous operation.
A faulty sensor can cause incorrect climate control behavior, leading to driver discomfort and reduced defogging performance. Replacing it with our genuine part restores accurate temperature readings and optimal cabin comfort.
Our Ambient Temperature Sensor matches the original calibration curve, ensuring that the displayed temperature and HVAC logic function exactly as designed by Sinotruk.
With a thermal time constant of less than 5 seconds, the sensor quickly adapts to changing outside temperatures, providing accurate information for climate control and driver awareness.
Built to withstand harsh under‑hood and front‑end environments, the sensor is waterproof (IP67) and resistant to road salts, oils, and UV radiation, ensuring long service life.
Direct swap for the original sensor – identical connector and mounting clip. No special tools or adapters needed; install in minutes and restore full functionality.
The Ambient Temperature Sensor is a small but essential component in the Sitrak C7H’s electronics suite. It provides the primary input for the outside temperature display, which is used by the driver to anticipate road conditions and adjust clothing.
Beyond the display, the sensor’s signal is used by the automatic climate control system to modulate heating, ventilation, and air conditioning. When the outside temperature drops, the system increases cabin heating to compensate, and vice versa.
The sensor also contributes to the defrost and defog functions. By comparing ambient temperature with interior humidity sensor readings, the VCU can automatically activate the windscreen heating to prevent misting.
In cold climates, the Ambient Temperature Sensor is used to trigger engine pre‑heating or fuel‑heater activation, depending on the vehicle’s equipment. Accurate readings are vital to prevent gelling of diesel fuel.
The sensor’s location on the front grille or mirror arm is carefully chosen to avoid heat from the engine and direct sunlight, ensuring readings reflect true air temperature. Our replacement sensor matches the exact thermal mass of the original.
When the original sensor fails, common symptoms include erratic temperature readings, a fixed value (e.g., -40°C), or a warning light on the dashboard. Our sensor resolves these issues immediately.
Replacement is straightforward: locate the sensor (usually behind the front bumper or near the left mirror), disconnect the 2‑pin connector, remove the mounting clip, and reverse the steps with the new unit. No calibration is needed.
We supply the Ambient Temperature Sensor with the correct connector pigtail and a new mounting clip. The harness length is identical to the original, so routing is unchanged.
Our sensor is tested for electromagnetic compatibility, ensuring that it does not interfere with other electronic systems like the radio or telematics.
For fleets, maintaining an accurate Ambient Temperature Sensor is important for consistent climate control across vehicles, reducing driver complaints and improving fuel efficiency (by avoiding unnecessary AC use).
We offer this sensor at a competitive price, backed by a 12‑month warranty. It is available individually or in bulk for fleet maintenance programs.
The sensor’s output is a linear voltage from 0.5V at -40°C to 4.5V at +85°C, compatible with the C7H’s analog input channels. We provide the resistance‑temperature table upon request for diagnostic purposes.
In the event of a sensor failure, the VCU will use a default value (usually 20°C) to maintain basic HVAC operation. However, this reduces efficiency and may cause fogging. Replacing the sensor restores full performance.
We recommend checking the sensor’s wiring harness for chafing or corrosion during replacement, as these can cause intermittent faults. Our sensor includes a strain relief boot to protect the connection point.
Our Ambient Temperature Sensor is also used in other Sinotruk models, making it a versatile stock item for workshops that service multiple truck brands.
We ship worldwide with tracking, and we can expedite orders for urgent cases. Use the Send Email button to request a quote with your preferred shipping method.
The sensor’s plastic housing is made of UV‑stabilized PBT, ensuring it won’t become brittle after years of sun exposure. The metal clip retains its spring tension.
We also provide a technical bulletin on proper sensor location if you are installing it on a vehicle that previously didn’t have one (e.g., base model upgrade). Contact us for details.
Choose our genuine Ambient Temperature Sensor for unmatched reliability and performance. It is an OEM part, not an aftermarket substitute, so you can trust its accuracy and longevity.
Order now and ensure your C7H’s climate control works perfectly in every season. Our friendly sales team is ready to assist you with any questions.
We maintain a large stock to meet demand, so your order ships within 24 hours. Get the peace of mind that comes with a genuine Sinotruk component.
Thank you for considering our Ambient Temperature Sensor. We are confident it will meet your expectations for quality and value.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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