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
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