Although road steering feel is much better in today's trucks, especially those with rack and pinion steering, than those of a generation ago, over- and understeer in trucks is more of a problem in trucks than in automobiles due to loading variables. Then, follow the on-screen repair in formation to make the necessary repairs or replacements. For example, a loose wire that makes intermittent contact. Install the brake drum on the wheel hub. A typical pulse generator assembly can be seen in the center of Figure 30-3. Insert the sensor cable through the hole in the spider and axle housing flange.
Stability electronics use lateral accelerometers, steer angle, and yaw rate sensors to detect and respond to a potential rollover condition faster than a driver can react to the situation. Stored Fault: There are two types of stored faults: A. Make sure that the spring clip tabs are on the inboard side of the vehicle. High-speed communication between the stability management electronics and the brake and vehicle drivetrain are system requirements. System Configuration Code: One digit code displayed during the clear mode. Refer to the in formation in this section.
Push the sensor completely into the sensor spring clip until it contacts the tooth wheel. Switch types and locations vary, depending on the make and model of the vehicle. The W24 uses an Arvin Meritor Quadraulic 4 piston caliper. If the indicator lamp comes on for three seconds and goes out: This indicates a correct installation. In a tandem axle system, the electrical supply may be directly to each modulator assembly or can be joined in a common connector and wiring harness assembly.
Refer to the in formation in this section. You are currently viewing our boards as a guest so you have limited access to our community. Find the fault on the chart and perform the necessary repairs. The fault code will be displayed three times. Repeat Step 1 and Step 2. The anti-lock system is powered up by the chassis electrical system. You should continue to steer and operate the throttle and brakes as you normally would.
Route the cable to the frame rail. Yaw is the tendency of a vehicle moving in a forward direction to turn about its vertical axis. When the friction at the tires of a truck is not sufficient to oppose the side forces it counters, one or more of its tires can slide, resulting in spin-out. Connect the sensor cable to the chassis harness. The fail light power flows through the normally closed relay contact. The complete sensor unit that includes the reluctor wheel and permanent magnet is referred to as a pulse generator.
It performs such tasks as data comparison, fetching and carrying data from memory, and arithmetic and logic calculations at very high speeds. If there are no faults found, the indicator lamp will flash one time, then one time again. This arrangement ensures that faults are reliably detected within the microprocessors. Repeat the sensor installation check. Do you need advice on what products to buy? The warning light may be mounted on the dash or above the windshield. In an oversteer condition, the system electronics can apply the outside front brake, whereas in an understeer, the inside front brake would be applied.
This means that most components cannot be inter- changed. Install the sensor spring clip. It shares operating wheel speed data. A graphic representation of the frequency signals produced by a wheel speed sensor is shown in Figure 30-4. Some modulator valve assemblies, instead of using solenoids, use motor-driven stepped pistons to regulate braking pressure. Select Display for a pull-down menu. Adjus t the sensor and, if necessary , perform a fault code check.
The operator is always in control of the vehicle, so do not take your hands off the steering wheel. Blink Code Switch: A momentary switch that activates blink code diagnostic capabilities. System faults may be Active or Stored. On a highway, yaw can always be considered undesirable. Bookmark and Thumbnail tabs at the side of the troubleshooting in formation sheet provide additional in formation.
Although this might sound slow compared to a desktop computer, it is fast enough to manage braking in a truck air brake system. When a failure is logged, it is stored in nonvolatile memory. The driver would find it difficult not to notice it. It is programmed with data that contains the rules and regulations that allow it to produce outcomes. A rollover can result when a vehicle with a high center of gravity negotiates a turning maneuver on high friction road surface.