Rolling Road Testing

Rolling Road Testing

General

IMPORTANT: Use a four wheel rolling road for brake testing If possible.

WARNING: Do not attempt to test ABS function on a rolling road.

Four wheel rolling road
Provided that front and rear rollers are rotating at identical speeds and that normal workshop safety standards are applied, there is no speed restriction during testing except any that may apply to the tyres.

Before testing a vehicle with anti-lock brakes on a four wheel rolling road, disconnect the ABS modulator. The ABS function will not work, the ABS warning light will illuminate. Normal braking will be available.

Two wheel rolling road
Upto03MY

ABS will not function on a two wheel rolling road. The ABS light will illuminate during testing. Normal braking will be available.

If brake testing on a two wheel rolling road is necessary, the following precautions should be taken:
- Propeller shaft to the rear axle is removed.
- Neutral selected in gearbox.

When checking brakes, run engine at idle speed to maintain servo vacuum.

From 03MY
The differential lock must be engaged for two wheel rolling road testing. It will also be necessary to disconnect the propeller shaft from the transfer box output shaft driving the axle whose wheels are NOT on the rolling road. Additionally, the ETC system must be deactivated by either removing the 10 amp fuse (Number 28, labelled ABS in the main fuse box) or disconnecting the ABS modulator pump. This must be done with the ignition OFF; a fault in the ABS system may still be recorded.

WARNING: Vehicles not fitted with a differential lock must not be tested on a rolling road where the rollers are driven by the vehicle.