JalTool Asphalt Paver Diagnostic Tool for Engine, Hydraulic and Screed Control Faults
Asphalt pavers must maintain stable travel speed, material flow, hydraulic pressure and screed temperature to produce a consistent road surface. Modern pavers use electronic control units for the engine, transmission, hydraulic system, screed control, leveling sensors, conveyor systems and emissions equipment.
When an asphalt paver stops moving correctly, shows an electronic warning or produces inconsistent screed performance, the fault may be caused by a sensor, controller, wiring problem, hydraulic component or communication network. The JalTool Asphalt Paver Diagnostic Tool helps professional workshops and mobile technicians diagnose supported road construction equipment in a structured way.
Common Asphalt Paver Diagnostic Problems
Many paver symptoms can be caused by more than one system. A screed problem may come from a leveling sensor, hydraulic valve, controller command or mechanical adjustment. Engine derate can also reduce hydraulic performance and create secondary warnings.
- Irregular paving speed or travel control
- Screed does not respond to adjustment commands
- Unstable screed heating or temperature warnings
- Conveyor or auger control problems
- Hydraulic movement becomes slow or intermittent
- Engine power reduction or derate mode
- Communication faults between control modules
- DPF, SCR, AdBlue or NOx-related warning codes
A professional diagnostic scan helps technicians identify whether the problem is electronic, hydraulic, mechanical or related to the machine’s CAN communication network.
What Can JalTool Check on a Supported Asphalt Paver?
Available functions depend on the manufacturer, model, production year, engine, ECU and installed system. On supported asphalt pavers, JalTool may provide access to the following diagnostic areas:
| System | Possible Diagnostic Functions |
|---|---|
| Engine ECU | Read supported fault codes, view live data and check engine parameters |
| Hydraulic system | Inspect supported pressure signals, sensors, valves and controller data |
| Screed control | Check supported screed controllers, adjustment signals and communication faults |
| Conveyor and auger | Review supported actuator commands, sensor values and electronic faults |
| Leveling system | Inspect supported sensors, calibration data and control-unit information |
| Aftertreatment | Diagnose supported DPF, SCR, AdBlue and emissions-related systems |
| Service functions | Perform supported calibrations, resets, adaptations and adjustment procedures |
Not every diagnostic function is available on every machine. Confirm the exact equipment details through the JalTool Vehicle Coverage page before purchasing.
Recommended JalTool Diagnostic Workflow
1. Record the Paver Information
Prepare the manufacturer, exact model, serial number, production year, engine model and diagnostic connector details. Note whether the issue occurs during transport, paving, screed adjustment, material feeding or heating operation.
2. Inspect Power, Grounds and Wiring
Check battery voltage, fuses, grounds, connectors and visible harness damage. Moisture, vibration and road-construction debris can damage connectors or create resistance in the wiring harness.
3. Perform a Full Supported System Scan
Connect the JalTool Diagnostic Scanner and scan all available electronic systems. Save active and stored fault codes before clearing them. Comparing engine, hydraulic, screed and leveling-system codes can help identify the primary fault.
4. Review Live Data
Use supported live data to compare engine speed, hydraulic pressure signals, screed sensor values, temperature readings, conveyor commands, auger inputs and controller voltages. A value that remains fixed or does not match the machine’s actual operation should be investigated.
5. Perform Supported Actuator Tests
Where available, actuator tests can help verify hydraulic valves, motors, relays, heaters and other electronically controlled components. Secure the paver before testing and follow the manufacturer’s safety instructions. Keep personnel away from the screed, conveyors, augers and hot surfaces.
6. Calibrate and Verify the Repair
After replacing a sensor, repairing wiring or correcting a hydraulic issue, complete any supported calibration or adjustment. Clear codes only after the repair, then perform another scan and save a diagnostic report.
Choosing a JalTool Package for Road Construction Equipment
Workshops that service asphalt pavers together with construction machinery, agricultural equipment and commercial vehicles can review the JalTool Professional Package.
Businesses that work with several equipment categories can review the JalTool Complete Diagnostic Package for broader supported vehicle and equipment coverage.
Workshops focused mainly on trucks and commercial vehicles can consider the Commercial Vehicle Package. The diagnostic interface and connection hardware are available through the JalTool Diagnostic Scanner hardware page.
Confirm Compatibility Before Ordering
A manufacturer name alone does not confirm support for every asphalt paver, engine, screed controller or leveling system. Send the exact model, year, engine, ECU and required function, such as live-data testing, calibration, actuator testing or emissions diagnosis.
For compatibility and package assistance, contact support@jaltool.com or WhatsApp at +84 908 532 146.
Purchase from an Authorized JalTool Source
Before paying for hardware or software activation, verify the seller through the JalTool Authorized Dealer Verification page. Businesses interested in distribution can visit the JalTool Dealer Program.
Important Compatibility Notice
JalTool is an independent diagnostic product and is not affiliated with, sponsored by or endorsed by Cojali or Jaltest. Diagnostic coverage and available functions depend on the manufacturer, model, production year, engine, ECU, installed system and supported procedure. Always confirm compatibility and follow the asphalt paver manufacturer’s safety instructions before testing.