Nissan Frontier D22. Manual - part 547

 

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Nissan Frontier D22. Manual - part 547

 

 

TROUBLE DIAGNOSIS

EC-1291

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Each value is for reference, the exact value may vary.

SEF241Y

EC-1292

[VG33ER]

TROUBLE DIAGNOSIS

SEF242YD

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-1293

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

PFP:00031

Description

UBS00DSG

The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

UBS00DSH

Vehicle driven distance: More than 5,000 km (3,107 miles)

Barometric pressure: 101.3 kPa (760.0 mmHg, 29.92 inHg)

±3 kPa (22.5 mmHg, 0.89 inHg)

Atmospheric temperature: 20 - 30

°C (68 - 86°F)

Engine coolant temperature: 75 - 95

°C (167 - 203°F)

Transmission: Warmed-up*

1

Electrical load: Not applied*

2

Engine speed: Idle

*1: For A/T models, after the engine is warmed up to normal operating temperature, drive vehicle until “FLUID
TEMP SE” (A/T fluid temperature sensor signal) indicates less than 0.9V. For M/T models, drive vehicle for 5
minutes after the engine is warmed up to normal operating temperature.
*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

Inspection Procedure

UBS00DSI

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.

1.

Perfor

EC-1247, "Basic Inspection"

 .

2.

Confirm that the testing conditions indicated above are met.

3.

Select  “B/FUEL SCHDL”,  “A/F ALPHA-B1”,  “A/F ALPHA-B2”
and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.

4.

Make sure that monitor items are within the SP value.

5.

If NG, go to 

EC-1294, "Diagnostic Procedure"

 .

SEF601Z

EC-1294

[VG33ER]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Diagnostic Procedure

UBS00DSJ

LEC089A

 

 

 

 

 

 

 

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