Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2015 Infiniti QX80 Base, AWDFACTORY OEM SERVICE PROCEDURE
Engine Control System (Introduction)
- Precaution
- Preparation
- System Description
- Component Parts
- Component Parts Location
- Component Description
- Accelerator Pedal Position Sensor
- Air Fuel Ratio (A/F) Sensor 1
- ASCD Brake Switch & Stop Lamp Switch
- ASCD Steering Switch
- ASCD Indicators
- Battery Current Sensor (With Battery Temperature Sensor)
- Camshaft Position Sensor
- Crankshaft Position Sensor
- ECM
- Electric Throttle Control Actuator
- Electrically-Controlled Cooling Fan Coupling
- Engine Coolant Temperature Sensor
- Engine Oil Temperature Sensor
- EVAP Control System Pressure Sensor
- EVAP Canister Vent Control Valve
- EVAP Canister Purge Volume Control Solenoid Valve
- Fuel Injector
- Fuel Level Sensor
- Fuel Pump Control Module
- Fuel Rail Pressure Sensor
- Fuel Tank Temperature Sensor
- Heated Oxygen Sensor 2
- High Pressure Fuel Pump
- ICC Brake Switch & Stop Lamp Switch
- ICC Steering Switch
- Ignition Coil With Power Transistor
- Intake Valve Timing Control Solenoid Valve
- Knock Sensor
- Low Pressure Fuel Pump
- Malfunction Indicator Lamp (Mil)
- Manifold Absolute Pressure Sensor
- Mass Air Flow Sensor (With Intake Air Temperature Sensor)
- Power Steering Pressure (PSP) Sensor
- Refrigerant Pressure Sensor
- VVEL Actuator Motor
- VVEL Actuator Motor Relay
- VVEL Control Module
- VVEL Control Shaft Position Sensor
- Structure And Operation
- System
- Engine Control System
- Direct Injection Gasoline System
- System Diagram
- System Description
- Input/Output Signal Chart
- System Description
- Various Fuel Injection Increase/Decrease Compensation
- Fuel Injection Control - Stratified-Charge Combustion
- Fuel Injection Control - Homogeneous Combustion
- Mixture Ratio Feedback Control (Closed Loop Control)
- Mixture Ratio Self-Learning Control
- Fuel Injection Timing - Sequential Direct Injection Gasoline System
- Stratified-Charge Start Control
- Fuel Shut-Off
- Fuel Pressure Control
- Cooling Fan Control
- Electric Ignition System
- Intake Valve Timing Control
- VVEL System
- Evaporative Emission System
- Fuel Filler Cap Warning System
- Air Conditioning Cut Control
- Alternator Power Generation Voltage Variable Control System
- Automatic Speed Control Device (ASCD)
- Can Communication
- Operation
- On Board Diagnostic (OBD) System
- Diagnosis System (ECM)
- Diagnosis Description
- 1ST Trip Detection Logic And Two Trip Detection Logic
- DTC And Freeze Frame Data
- Counter System
- Relationship Between Mil, 1ST Trip DTC, DTC, And Detectable Items
- Counter System Chart
- Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System"
- Explanation For Driving Patterns For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System" - Driving Pattern B
- Explanation For Driving Patterns For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System" - Driving Pattern C
- Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns Except For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System"
- Explanation For Driving Patterns Except For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System" - Driving Pattern A
- Explanation For Driving Patterns Except For "Misfire <Exhaust Quality Deterioration>", "Fuel Injection System" - Driving Pattern B
- Driving Pattern
- System Readiness Test (SRT) Code
- Permanent Diagnostic Trouble Code (Permanent DTC)
- Malfunction Indicator Lamp (Mil)
- On Board Diagnosis Function
- Consult Function
- Diagnosis Description
- Component Parts
- Ecu Diagnosis Information
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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