Infiniti F50. Manual - part 348

ENGINE CONTROL SYSTEM

EC-33

C

D

E

F

G

H

I

J

K

L

M

A

EC

Accelerator pedal position signal

T

R

R

R

Engine torque signal

T

R

R

Battery voltage signal

T

R

Closed throttle position signal

T

R

R

Wide open throttle position signal

T

R

Engine and A/T integrated control signal

T

R

R

T

Fuel consumption monitor signal

T

R

A/T CHECK indicator signal

T

R

A/T position indicator signal

T

R

Current gear position signal

R

R

R

T

R

Next gear position signal

R

R

R

T

Shift change signal

R

R

T

Shift pattern signal

R

R

T

VDC operation signal

R

T

R

Stop lamp switch signal

R

T

Steering angle sensor signal

R

T

Air conditioner switch signal

R

T

Headlamp switch signal

R

T

Rear window defogger switch signal

R

T

OD cancel switch signal

R

T

Vehicle speed signal

T

R

R

R

R

T

Output shaft revolution signal

R

R

T

ABS operation signal

R

T

R

R

TCS operation signal

R

T

R

A/T shift schedule change demand signal

T

R

Manual mode signal

R

R

T

Not manual mode signal

R

T

Manual mode shift up signal

R

T

Manual mode shift down signal

R

T

Manual mode indicator signal

T

R

Signals

ECM

VDC/

TCS/ABS 

control 

unit

ICC sen-

sor

ICC unit

TCM

Steering 

angle 

sensor

Combina-

tion meter

EC-34

BASIC SERVICE PROCEDURE

BASIC SERVICE PROCEDURE

PFP:00018

Idle Speed and Ignition Timing Check

EBS00LVI

IDLE SPEED

 With CONSULT-II

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

 With GST

Check idle speed with GST.

IGNITION TIMING

Any of following two methods may be used.

Method A

1.

Attach timing light to loop wire as shown.

2.

Check ignition timing.

Method B

1.

Remove No. 1 ignition coil.

SEF058Y

PBIB0139E

PBIB1248E

BASIC SERVICE PROCEDURE

EC-35

C

D

E

F

G

H

I

J

K

L

M

A

EC

2.

Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to this
wire.

3.

Check ignition timing.

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

EBS00LVJ

PREPARATION

1.

Make sure that the following parts are in good order.

–

Battery

–

Ignition system

–

Engine oil and coolant levels

–

Fuses

–

ECM harness connector

–

Vacuum hoses

–

Air intake system
(Oil filler cap, oil level gauge, etc.)

–

Fuel pressure

–

Engine compression

–

Throttle valve

–

Evaporative emission system

2.

On air conditioner equipped models, checks should be carried out while the air conditioner is “OFF”.

3.

On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio,
checks should be carried out while selector lever is in “N” position.

4.

When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe.

PBIB0140E

SEF166Y

PBIB1242E

EC-36

BASIC SERVICE PROCEDURE

5.

Turn off headlamp, heater blower, rear window defogger.

6.

Keep front wheels pointed straight ahead.

OVERALL INSPECTION SEQUENCE

PBIB2001E