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MECHANIC DIESEL - CITS

How to read a Tachometer?
The function of this gauge is to measure how fast the engine turns RPM (revolutions per minute). So, on the
dashboard, you will find single-digits displayed along with “x 1000”. Thus, indicating you need to multiply the
number displayed by 1000. With a higher RPM reading, more fuel is consumed. So, the best reading is when the
RPM is lower and consistent to help the engine operate at an optimal level.
• VOLT METER
Voltmeter provides information on the battery health of a car. Unlike the other digital dashes, not all passenger
cars have this gauge but contain a low-battery warning light. If the voltmeter lights up in any condition, it indicates
something is wrong with your vehicle’s electrical system.
How to read a Voltmeter?
Most vehicles nowadays contain a 12-volt electrical system. Therefore, when a car battery is fully charged and
functional, it must read 12.5 volts when the engine is not running. On the other hand, if the engine is running, its
alternator will recharge the battery. Therefore, if you notice a drop in the voltmeter, the car will not start....
• Oil pressure gauge
As the name states, the oil pressure gauge measures fuel consumption. Oil is responsible for running all its other
parts. It is never a wise decision to drive a car with a lower fuel level as it can damage your car’s engine. Lower
oil pressure can occur in instances if there is any serious leakage. Another possibility is that the fuel is full of dirt,
making it difficult to flow....

How to read an Oil Pressure Gauge?
Previous automobile models used to have a dial displaying oil pressure. However, newer models now have a
warning light on the dashboard that marks the oil pressure levels. You can measure this in pounds per square inch
or psi. Whether in an older car or new, if you find the low oil pressure signal is on, you must opt for car servicing.

Indicator
Indicators are a universal language by which all the drivers communicate. The job of the indicators is not only the
left and right turn, but it has the much wider possibility and can be combined with the hand gestures that everyone
can understand and follow to avoid any mishap on the road....

• Warning symbol indicator
• Safety symbol indicator
• Light symbol indicator
• Advanced features symbol indicator
Warning symbol indicator

1 Break warning lights
This warning light signals that the brake fluid pressure is too low. This could be a hazardous situation as you
might find yourself without any brakes and must be checked immediately. As soon as it’s safe to do so, pull

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CITS : Automotive - Mechanic Diesel - Lesson 84 CITS : Automotive - Mechanic Diesel - Lesson 84