Nissan TB45E Engine Control.pdf

ENGINE CONTROL SYSTEM

SECTION

EC

MODIFICATION NOTICE:

The wiring diagram for IACV-FICD solenoid valve on models with the TB45E engine has been changed.

CONTENTS

PRECAUTIONS ...2

Supplemental Restraint System (SRS)

″

AIR

BAG

″

and

″

SEAT BELT PRE-TENSIONER

″

...2

TB45E

ENGINE AND EMISSION CONTROL OVERALL

SYSTEM...3

Circuit Diagram ...3

TROUBLE DIAGNOSIS FOR NON-DETECTABLE

ITEMS...4

IACV-FICD Solenoid Valve ...4

GI

MA

EM

LC

FE

CL

MT

AT

TF

PD

FA

RA

BR

ST

RS

BT

HA

EL

SE

IDX

Supplemental Restraint System (SRS) “AIR

BAG” and “SEAT BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with

a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision.

The SRS system composition which is available to NISSAN MODEL Y61 is as follows (The composition

var-ies according to the destination.):

Driver air bag module (located in the center of the steering wheel), front passenger air bag module (located

on the instrument panel on passenger side), seat belt pre-tensioner, a diagnosis sensor unit, warning lamp,

wiring harness and spiral cable.

Information necessary to service the system safely is included in the RS section of this Service Manual.

WARNING:

I

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death

in the event of a collision which would result in air bag inflation, all maintenance must be performed

by an authorized NISSAN dealer.

I

Improper maintenance, including incorrect removal and installation of the SRS, can lead to

per-sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air

Bag Module, see the RS section.

I

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. Spiral cable and wiring harnesses covered with yellow insulation either just before

the harness connectors or for the complete harness are related to the SRS.

Circuit Diagram

TEC673

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

TB45E

GI

MA

EM

LC

FE

CL

MT

AT

TF

PD

FA

RA

BR

ST

RS

BT

HA

EL

SE

IDX

IACV-FICD Solenoid Valve

TEC674

DIAGNOSTIC PROCEDURE

For the Middle East with rear cooler

CHECK OVERALL FUNCTION.

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

650±50 rpm

If NG, adjust idle speed.

3. Turn air conditioner switch and blower fan switch “ON”.

4. Recheck idle speed.

950 rpm or more (LHD models)

NG

E

OK _{INSPECTION END}

Check if air conditioner compressor func-tions normally.

OK

E

NG _{Refer to HA section.}

CHECK POWER SUPPLY.

1. Stop engine.

2. Disconnect IACV-FICD solenoid valve harness connector.

3. Restart engine and turn air conditioner switch and blower fan switch “ON”. 4. Check voltage between terminalq2 and

ground with CONSULT or tester.

Voltage: Battery voltage

OK

E

NG _{Check the following.} IHarness connectors

M50 , F5

IHarness connectors

E104 , M86 (LHD mod-els)

IHarness for open or short between IACV-FICD solenoid valve and air conditioner relay If NG, repair harness or connectors.

With front auto A/C

E qA

(Go to next page.) With front

manual A/C

CHECK GROUND CIRCUIT.

1. Turn ignition switch “OFF”.

2. Check harness continuity between ter-minalq1 and body ground.

Continuity should exist.

If OK, check harness for short to ground and short to power.

NOTE:

Specifications may vary depending on the type of tester.

OK

E

NG

Check the following. IDiode F28

IHarness connectors

F5 , M50 , M21 , E127

IAmbient air temperature switch (Refer to HA sec-tion.)

IHarness for open or short between IACV-FICD solenoid valve and ground E40 , E25

If NG, repair open circuit, short to ground or short to power in harness or con-nectors.

qB

(Go to next page.)

MEF634E SEF617V SEF777W H H H H H

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS

TB45E

IACV-FICD Solenoid Valve (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

TF

PD

FA

RA

BR

ST

RS

BT

HA

EL

SE

IDX

qA

CHECK GROUND CIRCIT.

1. Turn ignition switch “OFF”.

2. Disconnect A/C auto amp. harness con-nectors.

3. Check harness continuity between IACV-FICD harness connector terminal q1 and A/C auto amp. harness connec-tor terminalq27.

Continuity should exist.

If OK, check harness for short to ground and short to power.

NOTE:

Specifications may vary depending on the type of tester.

OK

E

NG _{Check the following.} IDiode F28

IHarness connectors

F5 , M50

IHarness for open or short between IACV-FICD solenoid valve and A/C auto amp.

If NG, repair open circuit, short to ground or short to power in harness or con-nectors.

CHECK A/C AUTO AMP. Refer to HA section.

OK

F qB

CHECK COMPONENT (IACV-FICD solenoid valve).

Refer to “COMPONENT INSPECTION” below.

OK

E

NG _{Replace IACV-FICD} sole-noid valve.

Disconnect and reconnect harness con-nectors in the circuit. Then retest.

Trouble is not fixed. Check ECM pin terminals for damage and check the connection of ECM harness connector. Reconnect ECM harness con-nector. Then retest.

INSPECTION END

COMPONENT INSPECTION

IACV-FICD solenoid valve

Disconnect IACV-FICD solenoid valve harness connector.

I

Check for clicking sound when applying 12V direct current to

terminals.

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS

TB45E

I

Check plunger for seizing or sticking.

I

Check for broken spring.

SEF199S

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS

TB45E

IACV-FICD Solenoid Valve (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

TF

PD

FA

RA

BR

ST

RS

BT

HA

EL

SE

IDX