Brake System; Anti-Lock Brake System (Abs) - Volvo 850 Owner's Manual

1996 Volvo 850
can cause three-way catalytic converter or exhaust system overheating.
Remember that tampering or unauthorized modification to the engine or the vehicle may be illegal
and can cause three-way catalytic converter or exhaust system overheating. This includes:
- Altering fuel injection settings or components.
- Adjusting distributor ignition timing beyond specified limits.
- Altering emission system components or location or removing components
- Repeated use of leaded fuel.
NOTE: Unleaded fuel is required for cars with three-way catalytic converters. A label on the instrument
panel and inside fuel tank filler door will remind owners and filling station attendants of this
requirement.
Important! It is unlawful to dispense leaded fuel into any vehicle labeled "unleaded gasoline only".
pg. 4:16 Brake system

Anti-lock Brake System (ABS)

If the warning lamp lights up there is a malfunction of the ABS system (the standard braking system will
however function) and the vehicle should be driven to a Volvo retailer for inspection. The Anti-lock
Braking System (ABS) helps to improve vehicle control (stopping and steering) during severe braking
conditions by limiting brake lock-up. When the system "senses" impending lock-up, braking pressure is
automatically modulated in order to help prevent lockup, which could lead to a skid.
The system performs a self-diagnostic test when the vehicle first reaches a speed of approximately 12
mph (20 km/h). The brake pedal will pulsate several times and a sound may be audible from the ABS
control module. This is normal.
To obtain optimal effect from the ABS system, constant pressure should be kept on the brake pedal
while the system is modulating the brakes. Do not pump the brake pedal.
The switching of the ABS modulator will be audible and the brake pedal will pulsate at this time. Please
be aware that ABS does not increase the absolute braking potential of the vehicle. While control will be
enhanced, ABS will not shorten stopping distances on slippery surfaces.
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