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 Q50 Base, AWDFACTORY OEM SERVICE PROCEDURE
Engine Control System (Introduction) (Exc Hybrid)
- How To Use This Information
- Precaution
- Preparation
- System Description
- Component Parts
- Engine Control System
- Accelerator Pedal Position Sensor
- Air Fuel Ratio Sensor 1
- Air Fuel Ratio Sensor 1 Heater
- ASCD Indicator
- ASCD Steering Switch
- Battery Current Sensor (With Battery Temperature Sensor)
- Camshaft Position Sensor (Phase)
- Cooling Fan
- Crankshaft Position Sensor (Pos)
- ECM
- Electric Throttle Control Actuator
- Engine Coolant Temperature Sensor
- Engine Oil Temperature Sensor
- EVAP Canister Purge Volume Control Solenoid Valve
- EVAP Canister Vent Control Valve
- EVAP Control System Pressure Sensor
- Fuel Injector
- Fuel Level Sensor
- Fuel Pump
- Fuel Pump Control Module
- Fuel Tank Temperature Sensor
- Heated Oxygen Sensor 2
- Heated Oxygen Sensor 2 Heater
- Ignition Coil
- Information Display
- Intake Air Temperature Sensor
- Intake Valve Timing Control Solenoid Valve
- ICC Steering Switch
- Knock Sensor
- Malfunction Indicator Lamp (Mil)
- Mass Air Flow Sensor
- Power Steering Pressure Sensor
- Refrigerant Pressure Sensor
- Stop Lamp Switch & Brake Pedal Position Switch
- Throttle Control Motor
- Throttle Control Motor Relay
- Throttle Position Sensor
- VVEL Actuator Motor
- VVEL Actuator Motor Relay
- VVEL Control Module
- VVEL Control Position Sensor
- Structure And Operation
- System
- Engine Control System
- MULTIPORT Fuel Injection System
- Electric Ignition System
- Air Conditioning Cut Control
- Automatic Speed Control Device (ASCD)
- Can Communication
- Cooling Fan Control
- Evaporative Emission System
- Fuel Filler Cap Warning System
- Intake Valve Timing Control
- VVEL System
- Fuel Pump Control Module (FPCM)
- INFINITI Drive Mode Selector
- Information Display (Combination Meter)
- Warning/Indicator/Chime List
- Operation
- Handling Precaution
- On Board Diagnostic (OBD) System
- Diagnosis System (ECM)
- Diagnosis Description
- Diagnosis Description - 1ST Trip Detection Logic And Two Trip Detection Logic
- Diagnosis Description - DTC And Freeze Frame Data
- Diagnosis Description - Counter System
- Explanation For Driving Patterns For "Misfire
", "Fuel Injection System" - 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
", "Fuel Injection System" - 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
Factory Service Tools
Use the Manual With the Right Hardware
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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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