Nissan Frontier D22. Manual — part 552

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

EC-1311

[VG33ER]

C

D

E

F

G

H

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EC

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Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

Removal and Installation

UBS00DSV

HEATED OXYGEN SENSOR 1

Refer to

EM-80, "OUTER COMPONENT PARTS"

.

EC-1312

[VG33ER]

DTC P0034 SCB VALVE CONTROL SOLENOID VALVE

DTC P0034 SCB VALVE CONTROL SOLENOID VALVE

PFP:14110

Description

UBS00DSW

SYSTEM DESCRIPTION

This system controls supercharged air according to the engine operating conditions.
This control operation is accomplished through the ECM and the SCB valve control solenoid valve.
When the solenoid valve is ON, the SCB valve shuts. Then intake air is lead to supercharger, and super-
charged air is sent to the cylinder.
When the solenoid valve is OFF, the SCB valve opens. Then intake air is sent to the cylinder directly.
When the ECM detects any of the following conditions, current does not flow through the solenoid valve.

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Engine stopped

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Engine starting

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High-load, high-speed engine operation

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Excessively low engine coolant temperature

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Mass air flow sensor malfunction

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Engine coolant temperature sensor malfunction

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Throttle position sensor malfunction

COMPONENT DESCRIPTION
SCB Valve Control Solenoid Valve

The SCB valve control solenoid valve responds to signals from the
ECM.
When the ECM sends an OFF signal, the solenoid valve is bypassed
to apply intake manifold vacuum to the SCB valve actuator. This
operation opens the SCB valve. When the ECM sends ON (ground)
signal, the SCB valve opens or closes depend on the throttle valve
position, regarding to the pressure difference between atmosphere
and throttle body.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DSX

Specification data are reference values.

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

Supercharged
air control

SCB valve control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Ignition switch

Start signal

Throttle position sensor

Throttle position

SEC313C

LEC806

DTC P0034 SCB VALVE CONTROL SOLENOID VALVE

EC-1313

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

On Board Diagnosis Logic

UBS00DSY

DTC Confirmation Procedure

UBS00DSZ

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 10 seconds.

4.

If 1st trip DTC is detected, go to

EC-1315, "Diagnostic Proce-

dure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

MONITOR ITEM

CONDITION

SPECIFICATION

SCB/V CON S/V

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More than 5 seconds after turning ignition switch ON (Engine
stopped)

OFF

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Engine speed: Idle

ON

DTC No.

Trouble diagnosis name

DTC detection condition

Possible cause

P0034

SCB valve control solenoid valve cir-
cuit problem

Improper voltage signal from SCB
valve control solenoid valve is sent
to ECM.

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Harness or connectors (The SCB
valve control solenoid valve circuit
is open or shouted)

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SCB valve control solenoid valve.

SEF058Y

EC-1314

[VG33ER]

DTC P0034 SCB VALVE CONTROL SOLENOID VALVE

Wiring Diagram

UBS00DT0

BBWA1105E