The leak test checks three different components of the braking system:

The leak test checks three different components of the braking system:

• A. Holding pressure leak test; Audio and visual warning indicator; Ability of Parking Brake to engage automatically
• B. Holding pressure leak test; ABS activation; Tire pressure
• C. Holding pressure leak test; Engine oil level; Brake pad thickness
• D. Holding pressure leak test only

Answer: (A)

When testing a braking system for leaks, you verify three things: the system’s ability to hold pressure, the presence of a warning when pressure is lost, and the parking brake’s automatic engagement. First, the holding pressure test checks that the hydraulic system maintains its pressure without dropping. If pressure bleeds off, it indicates leaks in hoses, fittings, the master cylinder, wheel cylinders, or other components, signaling a potential loss of braking power. Second, the audio and visual warning indicator ensures that if pressure drops or a fault is detected, the device alerts the operator. This early warning is crucial for safe operation, so you know to take appropriate action. Third, the parking brake’s automatic engagement guarantees that, in the event of a pressure loss or fault, the parking brake can apply on its own to secure the vehicle and prevent movement. This is a safety fail‑safe feature. Other items listed—ABS activation and tire pressure, engine oil level and brake pad thickness, or holding pressure test alone—do not pertain to the leak-test checks described here, which are specifically about holding pressure, warning alerts, and automatic parking brake engagement.

When testing a braking system for leaks, you verify three things: the system’s ability to hold pressure, the presence of a warning when pressure is lost, and the parking brake’s automatic engagement.

First, the holding pressure test checks that the hydraulic system maintains its pressure without dropping. If pressure bleeds off, it indicates leaks in hoses, fittings, the master cylinder, wheel cylinders, or other components, signaling a potential loss of braking power.

Second, the audio and visual warning indicator ensures that if pressure drops or a fault is detected, the device alerts the operator. This early warning is crucial for safe operation, so you know to take appropriate action.

Third, the parking brake’s automatic engagement guarantees that, in the event of a pressure loss or fault, the parking brake can apply on its own to secure the vehicle and prevent movement. This is a safety fail‑safe feature.

Other items listed—ABS activation and tire pressure, engine oil level and brake pad thickness, or holding pressure test alone—do not pertain to the leak-test checks described here, which are specifically about holding pressure, warning alerts, and automatic parking brake engagement.