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J1A15-3800100 is the genuine Sinotruk Howo water temperature sensor, a critical chassis electrical component that monitors engine coolant temperature. This precision sensor belongs to the trusted family of Sinotruk Howo parts, ensuring accurate data transmission to the ECU for optimal engine performance and protection. Manufactured with a brass housing, high‑grade thermistor, and sealed connector, it guarantees long‑term reliability under extreme temperature and vibration. Designed to meet OE specifications, this sensor provides exact fit and instant response, safeguarding your Howo engine from overheating and inefficient combustion.
The J1A15-3800100 sensor uses a negative temperature coefficient (NTC) thermistor sealed in a brass housing. As coolant temperature rises, its internal resistance decreases, allowing the ECU to adjust fuel injection and cooling fan operation. This design ensures rapid response and high accuracy (±2°C) across the operating range.
The brass body is corrosion‑resistant and features a standard 1/2″ NPT thread for direct installation into the engine block or thermostat housing. The electrical connector is a waterproof Deutsch or AMP type, ensuring a secure, vibration‑proof connection that withstands under‑hood conditions.
Operating temperature range: -40°C to +130°C. The J1A15-3800100 provides linear output from 100kΩ at -40°C down to 200Ω at +120°C, compatible with all Howo ECU inputs. Response time is less than 5 seconds in moving coolant, enabling real‑time engine protection.
Supply voltage: 5V DC (regulated by ECU). The sensor’s durable construction withstands pressure spikes up to 10 bar and continuous vibration up to 20g. Each unit is 100% tested at three temperature points before shipment, ensuring consistent accuracy.
This J1A15-3800100 sensor is the direct OE replacement for Howo engines WD615, WD618, and MC series. It mounts in the cylinder head coolant outlet or thermostat housing, providing the ECU with essential temperature data for fuel metering and fan clutch control.
Compatible with all Howo chassis models from 2005 onward, including 6×4, 8×4, and 4×2 configurations. Always verify thread size – most Howo engines use 1/2″ NPT, but some variants use M14 x 1.5; the J1A15-3800100 is available in both.
Before installing a new J1A15-3800100, drain coolant below sensor level. Apply thread sealant (do not use PTFE tape on NPT threads) and tighten to 20‑25 Nm. Connect the harness and ensure the locking tab engages. Refill coolant and bleed air; check for leaks after engine warm‑up.
If the temperature gauge fluctuates or shows erratic readings, test the sensor resistance with a multimeter. A faulty J1A15-3800100 can cause poor fuel economy, overheating, or check‑engine lights. Replace immediately if out of specification; always use genuine parts for accurate engine management.
Genuine Sinotruk Howo parts like the J1A15-3800100 temperature sensor are engineered to provide exact resistance curves and mechanical fit, ensuring proper engine control and protection. Non‑genuine sensors may have incorrect temperature profiles, leading to over‑fueling, increased emissions, or even engine damage from overheating. Using genuine parts guarantees reliable data to the ECU, optimal fuel efficiency, and long engine life. The complete range of Sinotruk Howo parts is available through our network, including engine, gearbox, chassis, and cabin components – all backed by factory quality assurance and traceability.
The J1A15-3800100 water temperature sensor plays a vital role in the Howo engine management system. By providing real‑time coolant temperature, it allows the ECU to adjust injection timing, EGR flow, and cooling fan operation. A properly functioning sensor ensures that the engine reaches operating temperature quickly, reduces cold‑start emissions, and prevents overheating during heavy loads. Regular inspection of this sensor as part of preventive maintenance can save costly repairs and unplanned downtime.
When replacing the J1A15-3800100, always verify the connector type and thread pitch. Howo trucks produced after 2010 may use a different connector; cross‑reference your original part number. Our technical team can assist in identifying the correct variant. Genuine sensors come with a stamped date code and quality mark, guaranteeing they meet the latest emission standards and performance requirements.
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