Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INTAKE VALVE TIMING (IVT) CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect IVT control solenoid valve harness connector.
Turn ignition switch ON.
Check the voltage between IVT control solenoid valve harness connector and ground.

TERMINAL VOLTAGE REFERENCE CHART

DTC	IVT control solenoid valve			Ground	Voltage
DTC	Bank	Connector	Terminal	Ground	Voltage
P0075	1	F28	2	Ground	Battery voltage
P0081	2	F29	2	Ground	Battery voltage

Is the inspection result normal?

YES: GO TO 3.

NO: GO TO 2.

DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- Harness for open or short between IVT control solenoid valve and IPDM E/R
Repair open circuit, short to ground or short to power in harness or connectors.

CHECK IVT CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between IVT control solenoid valve harness connector and ECM harness connector.

TERMINAL CONTINUITY REFERENCE CHART

DTC	IVT control solenoid valve			ECM		Continuity
DTC	Bank	Connector	Terminal	Connector	Terminal	Continuity
P0075	1	F28	1	F101	18	Existed
P0081	2	F29	1	F101	29	Existed

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES: GO TO 4.

NO: Repair open circuit, short to ground or short to power in harness or connectors.

CHECK IVT CONTROL SOLENOID VALVE
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 5.

NO: Replace malfunctioning IVT control solenoid valve. Refer to "EXPLODED VIEW ".
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

INSPECTION END