Infiniti QX56 (Z62). Manual — part 510
EC-18
< SYSTEM DESCRIPTION >
[VK56VD]
COMPONENT PARTS
BODY COMPARTMENT
1.
A/F sensor 1 (bank 2)
2.
A/F sensor 1 (bank 1)
3.
Heated oxygen sensor 2 (bank 1)
4.
Heated oxygen sensor 2 (bank 2)
JSBIA0295ZZ
COMPONENT PARTS
EC-19
< SYSTEM DESCRIPTION >
[VK56VD]
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Component Description
INFOID:0000000006217657
1.
ASCD steering switch
ICC steering switch
2.
Snow mode switch
3.
Fuel level sensor unit and fuel pump
assembly (with fuel tank temperature
sensor)
4.
Fuel pump control module (FPCM)
5.
EVAP canister vent control valve
6.
EVAP canister
7.
EVAP control system pressure sen-
sor
8.
Stop lamp switch
9.
ASCD brake switch
ICC brake switch
10. Accelerator pedal position sensor
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Component
Reference
ECM
Malfunction indicator lamp (MIL)
EC-30, "Malfunction Indicator Lamp (MIL)"
Ignition coil with power transistor
EC-29, "Ignition Coil With Power Transistor"
Accelerator pedal position sensor
EC-21, "Accelerator Pedal Position Sensor"
Mass air flow sensor
EC-31, "Mass Air Flow Sensor (With Intake Air Temperature Sen-
sor)"
Intake air temperature sensor
Electric throttle control actuator
EC-23, "Electric Throttle Control Actuator"
Throttle control motor relay
Throttle control motor
Throttle position sensor
Crankshaft position sensor
EC-23, "Crankshaft Position Sensor"
Camshaft position sensor
EC-22, "Camshaft Position Sensor"
Engine coolant temperature sensor
EC-20
< SYSTEM DESCRIPTION >
[VK56VD]
COMPONENT PARTS
High pressure fuel pump
EC-28, "High Pressure Fuel Pump"
Low pressure fuel pump
EC-30, "Low Pressure Fuel Pump"
Fuel pump control module (FPCM)
EC-27, "Fuel Pump Control Module"
Fuel rail pressure sensor
EC-27, "Fuel Rail Pressure Sensor"
Low fuel pressure sensor
EC-30, "Low Fuel Pressure Sensor"
Fuel injector
Fuel level sensor
Fuel tank temperature sensor
EC-27, "Fuel Tank Temperature Sensor"
A/F sensor 1
EC-21, "Air Fuel Ratio (A/F) Sensor 1"
A/F sensor 1 heater
Heated oxygen sensor 2
EC-27, "Heated Oxygen Sensor 2"
Heated oxygen sensor 2 heater
Manifold absolute pressure sensor
EC-31, "Manifold Absolute Pressure Sensor"
Knock sensor
Engine oil temperature sensor
EC-25, "Engine Oil Temperature Sensor"
Power steering pressure sensor
EC-31, "Power Steering Pressure (PSP) Sensor"
Electrically-controlled cooling fan coupling
EC-24, "Electrically-controlled cooling fan coupling"
Intake valve timing control solenoid valve
EC-29, "Intake Valve Timing Control Solenoid Valve"
VVEL control module
VVEL actuator motor relay
EC-32, "VVEL Actuator Motor Relay"
VVEL actuator motor
VVEL control shaft position sensor
EC-32, "VVEL Control Shaft Position Sensor"
EVAP control system pressure sensor
EC-26, "EVAP Control System Pressure Sensor"
EVAP canister vent control valve
EC-26, "EVAP Canister Vent Control Valve"
EVAP canister purge volume control solenoid valve
EC-26, "EVAP Canister Purge Volume Control Solenoid Valve"
Battery current sensor (with battery temperature sensor)
EC-22, "Battery Current Sensor (With Battery Temperature Sen-
sor)"
Refrigerant pressure sensor
EC-32, "Refrigerant Pressure Sensor"
Stop lamp switch
EC-21, "ASCD Brake Switch & Stop Lamp Switch"
ASCD brake switch
ASCD steering switch
Information display
EC-49, "AUTMATIC SPEED CONTROL DEVICE (ASCD) : Switch
Name and Function"
Stop lamp switch
EC-29, "ICC Brake Switch & Stop Lamp Switch"
ICC brake switch
ICC steering switch
Component
Reference
COMPONENT PARTS
EC-21
< SYSTEM DESCRIPTION >
[VK56VD]
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Accelerator Pedal Position Sensor
INFOID:0000000006217658
The accelerator pedal position (APP) sensor is installed on the
accelerator pedal assembly. The sensor detects the accelerator
position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for engine operations such as fuel cut.
Air Fuel Ratio (A/F) Sensor 1
INFOID:0000000006217659
DESCRIPTION
The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater
in the element.
The sensor is capable of precise measurement = 1, but also in the lean and rich range. Together with its
control electronics, the sensor outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is
applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density
in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 760
°
C (1,400
°
F).
A/F SENSOR 1 HEATER
A/F sensor 1 heater is integrated in the sensor.
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element within the specified range.
ASCD Brake Switch & Stop Lamp Switch
INFOID:0000000006217660
Stop lamp switch and ASCD brake switch are installed to brake pedal bracket.
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
ASCD Steering Switch
INFOID:0000000006217661
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
ASCD Indicators
INFOID:0000000006217662
ASCD operation status is indicated by CRUISE indicator in combination meter.
ECM transmits the ASCD status signal to the combination meter via CAN communication according to ASCD
operation.
PBIB1741E
JSBIA0527GB
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