Rolling Road Testing

GENERAL INFORMATION

03-15

Hose clips

Markings (4) are usually provided on the hose to 
indicate the correct clip position. If no markings are 
provided, position the clip directly behind the 
retaining lip at the end of the stub as shown. Worm 
drive clips should be oriented with the crimped side 
of the drive  housing (5) facing towards the end of the 
hose, or the hose may become pinched between the 
clip and the stub pipe retaining lip.  Worm drive clips 
should be tightened to 3 Nm (2 lbf.ft) unless 
otherwise stated. Ensure that hose clips do not foul 
adjacent components.

Heat protection 
Always ensure that heatshields and protective 
sheathing are in good condition. Replace if damage 
is evident. Particular care must be taken when 
routing hoses close to hot engine components, such 
as the exhaust manifold and the Exhaust Gas 
Recirculation (EGR) pipe. Hoses will relax and 
deflect slightly when hot; ensure this movement is 
taken into account when routing and securing hoses.   

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
Up to 03MY

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:  

l

Propeller shaft to the rear axle is removed.

l

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.