2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 427
Is intake air leak detected?
YES - Discover air leak location and repair.
NO - GO TO 2.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
Is the inspection result normal?
YES-1 - With CONSULT-III: GO TO 3.
YES-2 - Without CONSULT-III: GO TO 4.
NO - Repair or replace malfunctioning part.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 4.
4.CHECK FUNCTION OF FUEL INJECTOR
1. Start engine and let it idle.
2. Listen to each fuel injector operation.
Clicking sound should be heard.
Is the inspection result normal?
YES - GO TO 5.
NO - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and
Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
