160 OPERA TION

operators manuals that the vehicle operator has a clear understanding which ABS options e installed the vehicle.

Location the yaw rate/lateral acceleration sensor must not When servicing required, the sensors must replaced with identical components using the original equipment mounting brackets and tightening torque specifications (20 N.m [15ft]).

The following additional changes MUST NOT made - vehicle:

• Changes maximum steering angle (to the left right)

• Changes steer axle and/or drive axle track width

• Changing the front and/or rear brake drums drums having a dif ferent flange thickness

T ire Size Calibration

The ECU requires a precise rolling circumference ratio between the front steer axle and the rear drive axles for optimum performance the For this the system continuously calculates the precise ratio and stores the information the ECU memory

Caution

Effectiveness the RSA system r elies the accuracy the r eported vehicle speed. major changes tir e sizes e made, such that changes the vehicle speedometer/odometer settings e r equir ed, the Advanced60™ ECU must r epr ogrammed with the new values a qualified technician.

Precautions When Installing Electrical Equipment

Connecting electrically powered electrically controlled equipment the vehicle may cause interference with other vehicle components (e.g., the ABS system). The amount interference will depend the operating frequency any new signals and the degree which transient signals are coupled into the vehicle system.

Note: Whenever new electrical equipment installed, the obligation the installer ensure that the new equipment does not interfere with the proper operation all other electrical systems the vehicle.

New Electrical Equipment A Vehicle Checkout Procedure Should

1 Perform the checkout procedure under the following conditions:

• Engine running

• Brake system air pressure operating range

• V ehicle stationary

• Brake pedal fully depressed

2 Operate the new equipment under all running and shutdown

3 Listen for signs air exhausting from ABS modulator valves (which indication interference

4 Correct all interference conditions before operating the vehicle.

Note: The center pin the standard seven - pin trailer electrical connector has been standardized the dedicated connection for uninterrupted power for trailer ABS. This pin always hot when the tractor ignition turned

Danger

Some trailers manufactured prior the trailer ABS regulations may use the center pin power certain trailer auxiliary equipment. The possibility exists that this auxiliary equipment may unexpectedly activated the truck tractor electrical system, resulting personal injury damage equipment. Caution must used when connecting the trailer electrical connector ensure that power the center pin will not unintentionally activate any trailer auxiliary equipment.

Automatic T raction Control TC) (If Equipped)

Automatic T raction Control TC) provides improved traction slippery surfaces reducing wheel spin. The system operates automatically follows:

• a drive wheel starts spin, A applies air pressure the brake the spinning wheel. Doing this transfers engine torque the wheels that have better traction.

• all drive wheels are A limits engine torque reduces wheel spin provide improved

When A automatically becomes active, the A indicator lamp turns alert the operator . The lamp turns f when the wheel(s) stops spinning.