Electronic Fuel Injection Exam Questions Solved Correctly Latest Update 2025-2026
What components could you find in a basic electronic control module? - Answers RAM PROM EEPROM
encoding process
What is a function of the input control section? - Answers Analog to digital signal encoding
What is pulse width modulation? - Answers Output
What is digital signal? - Answers One is in or out
What type of component is a coolant sensor? - Answers A 3 wire sensor it is a coefficient of thermistor
What type of component is an oil pressure sensor? - Answers 3 wire transducer, wheat stone bridge,
strangauge?
What type of component is an injector? - Answers Activator
What type of memory is volatile? - Answers RAM, Cruise control
What type of memory can be reprogrammed but needs to be removed from the ECM to do this? -
Answers EPROM chip
What is it called when you have multiple control modules communicating with eachother? - Answers
Multiplexing
The speed they communicate is called? - Answers Bod rate
What is another name of for a data bus? - Answers Back bone, cam bus, communication bus
What is the normal reference voltage for a sensor? - Answers 5 volts
How does a magnetic pickup sensor work? - Answers AC signal
What are the possible reasons the check engine light would turn on? - Answers Out of range high, 4.5-5
volts, out of range low, 0.5-1
What would cause a sensor to set a code? - Answers Short or an open
What would the code be for an open temp sensor? - Answers Out of range high
Where is the DDL connector located? Who controls its location? - Answers Left hand side of the dash or
cab, SAE Regulations
What fuel systems use a cam shaft to generate high pressure for injection? - Answers EUP
What are the four stage a EUI injector goes through to inject fuel? - Answers Pre injection, injection, end
of injection, fill
What components could you find in a basic electronic control module? - Answers RAM PROM EEPROM
encoding process
What is a function of the input control section? - Answers Analog to digital signal encoding
What is pulse width modulation? - Answers Output
What is digital signal? - Answers One is in or out
What type of component is a coolant sensor? - Answers A 3 wire sensor it is a coefficient of thermistor
What type of component is an oil pressure sensor? - Answers 3 wire transducer, wheat stone bridge,
strangauge?
What type of component is an injector? - Answers Activator
What type of memory is volatile? - Answers RAM, Cruise control
What type of memory can be reprogrammed but needs to be removed from the ECM to do this? -
Answers EPROM chip
What is it called when you have multiple control modules communicating with eachother? - Answers
Multiplexing
The speed they communicate is called? - Answers Bod rate
What is another name of for a data bus? - Answers Back bone, cam bus, communication bus
What is the normal reference voltage for a sensor? - Answers 5 volts
How does a magnetic pickup sensor work? - Answers AC signal
What are the possible reasons the check engine light would turn on? - Answers Out of range high, 4.5-5
volts, out of range low, 0.5-1
What would cause a sensor to set a code? - Answers Short or an open
What would the code be for an open temp sensor? - Answers Out of range high
Where is the DDL connector located? Who controls its location? - Answers Left hand side of the dash or
cab, SAE Regulations
What fuel systems use a cam shaft to generate high pressure for injection? - Answers EUP
What are the four stage a EUI injector goes through to inject fuel? - Answers Pre injection, injection, end
of injection, fill
