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Infiniti QX56 (Z62). Manual - part 529

EC-94

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

ECM

DTC No.

Detected items

Engine operating condition in fail-safe mode

U0113

U1003
U1024

Can communication circuit

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P0011

P0021

Intake valve timing control

The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.

P0087

FRP control system

• Engine torque is limited.
• VVEL value is maintained at a fixed angle.

P0088

Engine speed is limited.

P008A

Low fuel pressure control
system

Engine torque is limited.

P0090

FRP control system

• Engine torque is limited.
• VVEL value is maintained at a fixed angle.

P0102
P0103

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.

P0117
P0118

Engine coolant tempera-
ture sensor circuit

Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided

(CONSULT-III display)

Just as ignition switch is turned ON
or START

C (104

Approx. 4 minutes or more after
engine starting

C (176

Except as shown above

40 - 80

C (104 - 176

(Depends on the time)

When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.

P0122
P0123
P0222
P0223
P2135

Throttle position sensor

The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.

P0190

FRP sensor

• Engine speed is limited.
• High pressure fuel pump is activated at maximum discharge pressure.

P0201
P0202
P0203
P0204
P0205
P0206
P0207
P0208

Injector

• Engine torque is limited.
• Fuel injection shut-off of malfunction cylinder.
• Mixture ratio feedback control does not function.
• Idle engine speed is increased.

P0500

Vehicle speed sensor

The cooling fan operates (Highest) while engine is running.

P0524

Engine oil pressure

The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
Engine speed will not rise more than 2,400 rpm due to the fuel cut.

P0605

ECM

(When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.

P0607

ECM

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

ECM

EC-95

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

P062B

ECM

Type1
• Engine torque is limited.
• Idle engine speed is increased.
• Fuel injector power supply shut-off.
• High fuel pressure limitation.

Type2
• Engine torque is limited.
• Fuel injection shut-off of malfunction cylinder.
• Mixture ratio feedback control does not function.
• Idle engine speed is increased.

P0643

Sensor power supply

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P1087
P1088

VVEL control function

VVEL of normal bank is controlled at VVEL angle of abnormal bank.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P1089
P1092

VVEL control shaft position
sensor

VVEL value is maintained at a fixed angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut

P1197

Out of gas

• Engine torque is limited.
• VVEL value is maintained at a fixed angle.

P1608

VVEL control shaft position
sensor

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P1090
P1093

VVEL actuator motor

VVEL of normal bank is controlled at VVEL angle of abnormal bank.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P1091

VVEL actuator motor relay

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P1197

Out of gas

• Engine torque is limited.
• VVEL value is maintained at a fixed angle.

P2101

Electric throttle control
function

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2118

Throttle control motor

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2119

Electric throttle control ac-
tuator

(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator because of regulating the throttle open-
ing to 20 degrees or less.

(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driven, it slows down gradually by fuel cut. After the vehicle
stops, the engine stalls.
The engine can restart in the N or P position, and engine speed will not exceed 1,000 rpm
or more.

P1290
P2100
P2103

Throttle control motor relay

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P1606

VVEL control module

VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.

P1805

Brake switch

ECM controls the electric throttle control actuator by regulating the throttle opening to a
small range.
Therefore, acceleration will be poor.

Vehicle condition

Driving condition

When engine is idling

Normal

When accelerating

Poor acceleration

DTC No.

Detected items

Engine operating condition in fail-safe mode

EC-96

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

ECM

DTC Inspection Priority Chart

INFOID:0000000006217732

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

P2122
P2123
P2127
P2128
P2138

Accelerator pedal position
sensor

P2539

Low fuel pressure sensor

Engine torque is limited.

DTC No.

Detected items

Engine operating condition in fail-safe mode

ECM

EC-97

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

Priority

Detected items (DTC)

• U0101 CAN communication line
• U0113 U1003 CAN communication line
• U1001 CAN communication line
• U1024 VVEL CAN communication line
• P006A P0101 P0102 P0103 Mass air flow sensor
• P010A Manifold absolute pressure sensor
• P0112 P0113 P0127 Intake air temperature sensor
• P0116 P0117 P0118 P0125 Engine coolant temperature sensor
• P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
• P0128 Thermostat function
• P0181 P0182 P0183 Fuel tank temperature sensor
• P0196 P0197 P0198 Engine oil temperature sensor
• P0327 P0328 P0332 P0333 Knock sensor
• P0335 Crankshaft position sensor
• P0340 P0345 Camshaft position sensor
• P0460 P0461 P0462 P0463 Fuel level sensor
• P0500 Vehicle speed sensor
• P0527 Cooling fan speed sensor
• P0605 P0607 P0611 P062B ECM
• P0643 Sensor power supply
• P0700 TCM
• P0705 P0850 Transmission range switch
• P1089 P1092 P1608 VVEL control shaft position sensor
• P1197 Out of gas*
• P1220 Fuel pump control module (FPCM)
• P1421 P1423 P1424 Cold start control
• P1550 P1551 P1552 P1553 P1554 Battery current sensor
• P1556 P1557 Battery temperature sensor
• P1606 P1607 VVEL control module
• P1610 - P1615 NATS
• P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
• P2539 P2541 P2542 Low fuel pressure sensor

Content .. 527 528 529 530 ..