ASE G1 Auto Maintenance and Light RepairMaintenance and Light RepairEasy
A technician is performing a multi-point inspection. Which of the following fluid levels should be checked with the engine running and at operating temperature?
- ACoolant.
- BBrake fluid.
- CEngine oil.
- DAutomatic transmission fluid (ATF).
Show answer & explanationAnswer & explanation
Correct answer: D. Automatic transmission fluid (ATF).
Automatic transmission fluid (ATF) level is typically checked with the engine running, in Park (P) or Neutral (N), and at operating temperature, as specified by the manufacturer, to ensure an accurate reading that accounts for fluid expansion and circulation within the transmission.
Why the other options are wrong
- A. Engine coolant is typically checked with the engine cool to avoid burns from hot, pressurized fluid and to get an accurate cold fill level.
- B. Brake fluid level is checked with the engine off, as it's a static system.
- C. Engine oil is typically checked with the engine off and cool, allowing all oil to drain back to the pan.
Fluid Level Checks
The proper procedure for inspecting various automotive fluid levels to ensure accurate readings and safe operation.
- Procedures vary by fluid type and manufacturer.
- Engine oil and coolant are usually checked cold/off.
- ATF is often checked hot/running.
- Brake fluid and power steering fluid are typically checked cold/off.
Memory trick: Some fluids need to be hot and flowing to show their true level.