Haval Jolion ABS Light On? Start With the Wheel Speed Sensors

What that glowing ABS light is really telling you

When the ABS light on your Haval Jolion stays on solid instead of flickering or clearing after startup, the ABS module has logged a fault and switched the anti-lock function off. It is not a guess or a glitch — the module ran its self-test, compared the four wheel speed signals, found something it did not like, and disabled the system to protect itself. In my experience with the Jolion, the overwhelming majority of these cases come back to a wheel speed sensor or the circuit feeding it, simply because those sensors live down at the wheels where they face water, road salt, brake dust and vibration every single day. The good news is that this is one of the more straightforward diagnostics on the car, and it rarely means an expensive module replacement.

The usual suspects, in the order I would check them

• Wheel speed sensor itself — the most common failure by far. The sensor can fail internally, get contaminated with metallic debris, or be knocked out of its mounting seat.
• Sensor wiring and connectors — look for chafed insulation near the hub, corroded pins, or a connector that has filled with water. A broken wire flexing with suspension travel is a classic intermittent culprit.
• Tone ring (reluctor ring) — the toothed or magnetic ring on the hub can crack, rust, or pick up metal shavings, which scrambles the signal the sensor reads.
• Wheel bearing play — a worn bearing changes the air gap between sensor and ring, causing a dropout at speed.
• Low battery voltage or a weak ground — the Jolion is sensitive to voltage sags, and a tired battery can set odd ABS codes.
• ABS module or pump — possible, but genuinely rare. Only suspect it after the sensors and wiring are proven good.

How it gets confirmed properly

The right first step is always a scan tool read of the ABS module — not just the engine codes — so you know which wheel the module is unhappy with. From there, a mechanic will inspect that corner, check the sensor resistance against spec, and watch live wheel speed data while spinning the wheel by hand or on a lift. A healthy sensor produces a smooth, even signal that rises with wheel speed; a dying one drops out, spikes, or reads zero. Cleaning the sensor tip and tone ring, reseating the sensor, and repairing a damaged harness often solves it outright. If the light came on right after brake work, tyre replacement, or a hub job, tell your mechanic — that narrows things down immediately.

Is it safe to keep driving?

Short answer: mostly yes, with caution. Your normal hydraulic brakes still work exactly as they should, so you can drive to a workshop. What you have lost is anti-lock braking and, on most Jolions, the stability and traction control that rely on the same wheel speed signals — meaning the wheels can lock under hard braking, especially in the wet or on gravel, and the car will not step in to help. So drive gently, leave a bigger gap, avoid heavy panic stops, and get it looked at within a few days rather than weeks. One exception: if the red brake warning light is also on, the pedal feels soft or long, or you hear grinding, stop driving and have it recovered — that is a brake system fault, not just an ABS sensor.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.