Chapter 4 Sensor Applications with
Complete Solutions 2025
Air Charge Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Provides
control module with information about air intake temperature
- Assists in calculating fuel flow and spark advance
Barometric Absolute Pressure Sensor (Three-wire Passive Sensors Applications) -
ANSWER-- Provides information about barometric pressure
- Helps regulate performance of vehicle
- Adjusts air-fuel mixture and timing controls
CKP Sensor (Active Sensors Applications) - ANSWER-- Variable-reluctance sensor
- Informs control module of crankshaft position
- Determines when to inject fuel and start ignition
CKP Sensor (Digital Sensors Applications) - ANSWER-- Can also be digital through use
of Hall-effect device
- Informs control module of crankshaft position
- Signal is easily interpreted by control module
- Signal doesn't require conversion or conditioning
CMP Sensor(Active Sensors Applications) - ANSWER-- Determines which cylinder
should receive fuel and spark
- Communicates information to control module to synchronize fuel injection and ignition
coil spark
Common Sensor Applications - ANSWER-- Sense position of engine components
- Measure pressure of air and fluids
- Measure temperature of air and fluids
- Measure speed in transmissions and at wheels
Cylinder Head Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Measures
temperature from cylinder head
- Some sit in an air pocket
Differential Pressure Feedback EGR Sensor (Three-wire Passive Sensors Applications)
- ANSWER-- Monitors pressure difference between control chamber and exhaust
system
- Allows control module to monitor and control EGR flow
Engine Coolant Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Provides
control module with information about engine coolant temperature
- Assists with determining when engine is hot enough for closed-loop operation
Complete Solutions 2025
Air Charge Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Provides
control module with information about air intake temperature
- Assists in calculating fuel flow and spark advance
Barometric Absolute Pressure Sensor (Three-wire Passive Sensors Applications) -
ANSWER-- Provides information about barometric pressure
- Helps regulate performance of vehicle
- Adjusts air-fuel mixture and timing controls
CKP Sensor (Active Sensors Applications) - ANSWER-- Variable-reluctance sensor
- Informs control module of crankshaft position
- Determines when to inject fuel and start ignition
CKP Sensor (Digital Sensors Applications) - ANSWER-- Can also be digital through use
of Hall-effect device
- Informs control module of crankshaft position
- Signal is easily interpreted by control module
- Signal doesn't require conversion or conditioning
CMP Sensor(Active Sensors Applications) - ANSWER-- Determines which cylinder
should receive fuel and spark
- Communicates information to control module to synchronize fuel injection and ignition
coil spark
Common Sensor Applications - ANSWER-- Sense position of engine components
- Measure pressure of air and fluids
- Measure temperature of air and fluids
- Measure speed in transmissions and at wheels
Cylinder Head Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Measures
temperature from cylinder head
- Some sit in an air pocket
Differential Pressure Feedback EGR Sensor (Three-wire Passive Sensors Applications)
- ANSWER-- Monitors pressure difference between control chamber and exhaust
system
- Allows control module to monitor and control EGR flow
Engine Coolant Temperature Sensor (Two-wire Active Sensors) - ANSWER-- Provides
control module with information about engine coolant temperature
- Assists with determining when engine is hot enough for closed-loop operation
