2017 Infiniti Q50 Base, AWDFACTORY OEM SERVICE PROCEDURE

Test Item

Test item Full spell Condition
CHECK DECELERATION AIR SWITCHOVER VALVE CHECK DECELERATION AIR SWITCHOVER VALVE
  • Combustion engine AT STANDSTILL.
  • Ignition ON.
CHECK ENGINE OIL PUMP VALVE CHECK ENGINE OIL PUMP VALVE
  • Combustion engine AT STANDSTILL.
  • Ignition ON.
Check boost pressure control Check boost pressure control Engine running at idle
CHECK PURGING SWITCHOVER VALVE CHECK PURGING SWITCHOVER VALVE
  • Combustion engine AT STANDSTILL
  • Ignition ON.
Check intake camshaft solenoid Check intake camshaft solenoid
  • The ignition is switched ON.
  • Engine running at idle
  • Coolant temperature > 80°C (176°F)
Check exhaust camshaft solenoid Check exhaust camshaft solenoid
  • The ignition is switched on.
  • Engine running at idle
  • Coolant temperature > 80°C (176°F)
CAMSHAFT POSITIONER CAMSHAFT POSITIONER
  • Apply parking brake.
  • Move selector lever to position 'P' or 'N' on vehicles with automatic transmission.
  • Shift the gearshift lever to neutral on vehicles with manual transmission.
  • During the test the engine speed must be between 2, 700 and 3, 500 RPM.
Check cylinder fuel injectors Check cylinder fuel injectors Engine running at idle
Quantity control valve Quantity control valve
  • The fuel low pressure circuit is OK.
  • The combustion engine is at idle.
  • All electrical accessories must be switched OFF.
CHECK FUEL HIGH PRESSURE CIRCUIT FOR LEAK TIGHTNESS CHECK FUEL HIGH PRESSURE CIRCUIT FOR LEAK TIGHTNESS
  • Ignition ON.
  • Coolant temperature between 75°C and 105°C (167°F and 221°F)
  • Fuel temperature between 40°C and 80°C (104°F and 176°F)
  • Start combustion engine.
  • Combustion engine IDLING
  • Switch off all current consumers.
  • Connect charger for battery.
CHECK FUEL HIGH PRESSURE CIRCUIT CHECK FUEL HIGH PRESSURE CIRCUIT
  • Ignition ON.
  • Apply parking brake.
Check fuel pressure and temperature sensor rail pressure Check fuel pressure and temperature sensor rail pressure
  • Combustion engine IDLING.
  • Coolant temperature between 75°C (167°F) and 105°C (221°F)
  • All electrical accessories must be switched OFF.
CK ENG AND AC WITH INTEGRATED CONT FAN MOTOR CHECK COMBUSTION ENGINE AND AC WITH INTEGRATED CONTROL FAN MOTOR
  • Ignition ON.
  • Combustion engine AT STANDSTILL
  • Vehicle AT STANDSTILL
ALTERNATOR DIAGNOSIS ALTERNATOR DIAGNOSIS
  • DTC is not detected.
  • Combustion engine AT STANDSTILL
  • No charger must be connected.
  • The charge level of the battery is OK.
  • The battery voltage must be between 11.5 V and 15 V.
  • Switch off air conditioning.
  • Make sure that all current consumers are switched off.
Check coolant thermostat heating element Check coolant thermostat heating element
  • Engine running at idle.
  • Combustion engine AT STANDSTILL
  • Vehicle AT STANDSTILL
CHECK THROTTLE VALVE ACTUATOR CHECK THROTTLE VALVE ACTUATOR
  • Coolant temperature > 80°C (176°F)
  • Ignition ON
  • The combustion engine is at a standstill.
  • Accelerator pedal NOT OPERATED
MIXTURE ADAPTATION MIXTURE ADAPTATION
  • Engine speed: 400 - 800 RPM
  • Coolant temperature between 40°C (104°F) and 80°C (176°F)
  • Engine load: 30% or less
  • Selector lever: P or N
AUTO STOP START AUTO STOP START
  • Engine: After warning up, run engine at idle.
  • Selector lever: N or P range
  • "Start" and "Cancel" using CONSULT.
CAUTION:

Be careful so that a hood operations in the opened state when carry out work.

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.