Tata Motors Diagnostic Expert cum Trainer Interview Questions, Process, and Tips

The engine may not start or may stall while driving if the crank sensor is removed.

• Engine may not start

• Engine may stall while driving

• Loss of engine power

• Check engine light may illuminate

CAN high and CAN low lines are communication lines used in automotive networks to transmit data between electronic control units.

• CAN high line carries high voltage signals

• CAN low line carries low voltage signals

• Differential voltage between CAN high and CAN low lines determines the data being transmitted

• Used in Controller Area Network (CAN) protocol in vehicles

DEF stands for Diesel Exhaust Fluid, a solution used in diesel engines to reduce emissions of nitrogen oxides.

• DEF is a mixture of urea and deionized water

• It is injected into the exhaust stream of diesel engines to break down nitrogen oxides into harmless nitrogen and water

• The process is known as Selective Catalytic Reduction (SCR)

• Commonly used in modern diesel vehicles and trucks

AMT stands for Automated Manual Transmission, while MT stands for Manual Transmission. AMT is a semi-automatic transmission with automated clutch and gear shifting, while MT requires manual clutch and gear shifting.

• AMT has automated clutch and gear shifting, while MT requires manual operation

• AMT provides convenience of automatic transmission with fuel efficiency of manual transmission

• AMT is easier to drive in traffic c...read more

The EGR system recirculates a portion of exhaust gases back into the engine intake to reduce emissions and improve fuel efficiency.

• EGR valve controls the flow of exhaust gases into the intake manifold

• Helps lower combustion temperatures to reduce NOx emissions

• Improves fuel efficiency by reducing the amount of oxygen in the combustion chamber

• Common issues include carbon buildup and valve malfunctions