IICL Chassis Inspector Exam Questions with 100% Correct Answers

What is traction control? Correct Answer Helps the ABS improve vehicle traction by minimizing wheel slip on the drive axle during acceleration. What is ABS? Correct Answer Antilock braking systems are electronic systems that monitor and control wheel slip during vehicle braking. What are the components of ABS? Correct Answer electronic control unit (ECU), wheel speed sensors, modulator valves, exciter rings In ABS, what is the function of the electronic control unit (ECU)? Correct Answer Processes all ABS info and signal functions. Receives and interprets voltage pulses generated by the sensor pickup as the exciter teeth pass by, and uses this info to determine: (a) impending wheel lock, and (b) when/how to activate the ABS modulator valves. In ABS, what is the function of the modulator valves? Correct Answer Regulate air pressure to the brakes during ABS action. ECU commands mod valve to either change the air pressure to the brake chamber, or hold the existing pressure. In ABS, what are the 2 main components of the wheel speed sensors? Correct Answer (1) exciter, and (2) pickup In ABS, what is an exciter? Correct Answer A ring with notched teeth, also known as sensor ring, tooth wheel, tone ring, and exciter. In ABS, what is an pickup? Correct Answer Commonly called "the sensor" which contains a wire coil/magnet assembly, which generates pulses of electricity as teeth of the exciter pass in front of it. Which pin/wire is the power supply for ground on a 7-way plug? Correct Answer Pin 1 - white Which pin/wire is the power supply for stop and antilock on a 7-way plug? Correct Answer Pin 2 - red Which pin/wire is the power supply for power for electronic control unit (ECU) on a 7-way plug? Correct Answer Pin 3 - blue Which pin/wire is the power supply for identification, front and intermediate markers, front clearance, rear markers, license, tail and rear clearance on a 7-way plug? Correct Answer Pin 4 - brown