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.
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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROL SYSTEM (5.6L) (DTC/CIRCUIT DIAGNOSIS) (1 OF 9))DTC/CIRCUIT DIAGNOSISTROUBLE DIAGNOSIS - SPECIFICATION VALUECOMPONENT FUNCTION CHECK
2019 Infiniti Q70 3.7 Luxe, AWD
Component Function Check
2019 Infiniti Q70 3.7 Luxe, AWDSECTION Component Function Check
WARNING: This page is about a different variant/trim than selected.
- PRECONDITIONING
Check that all of the following conditions are satisfied.
TESTING CONDITION
- Vehicle driven distance: More than 5, 000 km (3, 107 miles)
- Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm 2 , 14.25 - 15.12 psi)
- Atmospheric temperature: 20 - 30 deg.C (68 - 86 deg.F)
- Engine coolant temperature: 75 - 95 deg.C (167 - 203 deg.F)
- Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle until "ATF TEMP 2" (A/T fluid temperature sensor signal) indicates more than 60 deg.C (140 deg.F).
- Electrical load: Not applied
- Rear window defogger switch, air conditioner switch and lighting switch are OFF. Steering wheel is straight ahead.
- Engine speed: Idle
- Gear position: Neutral (or parking)
GO TO 2.
- PERFORM SPEC IN DATA MONITOR MODE
WITH CONSULT
NOTE: Perform "SPEC" in "DATA MONITOR" mode in maximum scale display.- Perform basic inspection. Refer to Work Procedure .
- Select "B/FUEL SCHDL", "A/F ALPHA-B1", "A/F ALPHA-B2", "MAS A/F SE-B1" and "MAS A/F SE-B2" in "SPEC" of "DATA MONITOR" mode with CONSULT.
- Check that monitor items are within the SP value.
Is the measurement value within the SP value?
YES
INSPECTION END
NO
Proceed to Diagnosis Procedure .
RENDER: 1.0x
NO RELATED
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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.