V70 XC AWD L5-2.4L Turbo VIN 56 B5254T (1998)
ABS Light: Description and Operation
ABS warning light
This is located on the instrument panel (dashboard) and is activated if the ABS system control module detects a fault in the ABS system.
When the ignition is switched on or the engine starts, the control module switches the warning light on. The light then goes out after approximately 2
seconds if no fault is detected. If the warning light is on, the ABS system is not working but normal braking power is still available. The warning light
flashes when the ABS system DTM is activated.
Warning: ABS and EBD are not available while Volvo Diagnostics is activated. Take great care when test driving as there is a serious risk of
the wheels locking when braking.
When the control module DTM is disengaged, the warning light comes on for approximately 2 seconds and then goes out if no fault is detected.
The warning light is controlled by a relay on the instrument panel (dashboard). When the ABS control module grounds the signal to the relay, the relay
breaks the light's ground and the light goes out.
When the ABS control module increases the voltage over approximately 7 V, the relay opens and the light comes on.