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Home >> Infiniti >> 2022 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1 Of 3) >> System Description >> Diagnosis System (ECM) >> CONSULT Function >> Active Test Mode
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Active Test Mode

Test Item 

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

ENG COOLANT TEMP

Change the engine coolant temperature using CONSULT.

If malfunctioning symptom disappears, see CHECK ITEM.

  • Harness and connectors
  • Engine coolant temperature sensor
  • Fuel injector

FUEL INJECTION

Change the amount of fuel injection using CONSULT.

If malfunctioning symptom disappears, see CHECK ITEM.

  • Harness and connectors
  • Fuel injector
  • Air fuel ratio (A/F) sensor 1

IGNITION TIMING

  • Timing light: Set
  • Retard the ignition timing using CONSULT.

If malfunctioning symptom disappears, see CHECK ITEM.

Perform Idle Air Volume Learning.

PURG VOL CONT/V

  • Engine: After warming up, run engine at 1, 500 rpm.
  • Change the EVAP canister purge volume control solenoid valve opening percent using CONSULT.

Engine speed changes according to the opening percent.

  • Harness and connectors
  • EVAP canister purge volume control solenoid valve

FUEL/T TEMP SEN

Change the fuel tank temperature using CONSULT.

POWER BALANCE

  • Engine: After warming up, idle the engine.
  • A/C switch OFF
  • Selector lever: N position
  • Cut off each injector signal one at a time using CONSULT.

Engine runs rough or stops. (Works for accidental fire.)

  • Harness and connectors
  • Compression
  • Direct fuel injector
  • Power transistor
  • Spark plug
  • Ignition coil

INT V/T ASSIGN ANGLE

Changes intake valve timing using CONSULT.

If malfunctioning symptom disappears, see CHECK ITEM.

  • Harness and connectors
  • Intake valve timing control solenoid valve

EXT V/T ASSIGN ANGLE

Changes exhaust valve timing using CONSULT.

If malfunctioning symptom disappears, see CHECK ITEM.

Fuel pump speed changes or stops.

FPCM

  • Engine: Return to the original trouble condition
  • Select "LOW", "MID" and "HI" with CONSULT.

Fuel pump speed changes or stops.

  • Harness and connectors
  • Fuel pump control module (FPCM)

VENT CONTROL/V

  • Ignition switch: ON (Engine stopped)
  • Turn EVAP canister vent control valve ON and OFF with the CONSULT and listen to operating sound.

EVAP canister vent control valve makes an operating sound.

  • Harness and connectors
  • EVAP canister vent control valve

WASTEGATE ACTUATOR

  • Ignition switch: ON
  • Engine stopped
  • Change valve of wastegate actuator target angle using CONSULT

Wastegate valve position sensor voltage changes according to valve target angle

  • Harness and connectors
  • Electric wastegate control actuator (Removal bypass valve from turbocharger is NG)
  • Turbocharger assembly

TC BYPASS VALVE

  • Ignition switch: ON
  • Engine stopped or Engine running

    (idling, less than 1200 rpm)

  • Input "ON" "OFF" signal using CONSULT

Bypass valve makes the operating sound.

  • Harness and connectors
  • Turbocharger bypass valve (Removal bypass valve from Turbocharger is NG)
  • Turbocharger assembly

FAN DUTY CONTROL*

  • Ignition switch: ON
  • Change duty ratio using CONSULT.

Cooling fan speed changes.

  • Harness and connectors
  • Cooling fan motor
  • IPDM E/R

TUMBLE CONTROL VALVE

  • Ignition switch: ON (Engine stopped)
  • Turn the intake manifold runner control valve "ON" and "OFF" using CONSULT to open or close.

Touch the intake manifold runner control valve motor and check the operating vibration and sound.

  • Harness and connectors
  • Intake manifold runner control valve
  • Intake manifold runner control valve motor

VCR system

  • Ignition switch: ON
  • Change target angle of VCR control shaft 2 using CONSULT.

VCR control shaft 2 actual angle changes according to target angle

  • Harness and connectors
  • VCR motor
  • VCR motor rotation angle sensor
  • VCR control shaft 2 rotation angle sensor

*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.