Nissan Frontier D22. Manual — part 397
TROUBLE DIAGNOSIS
EC-691
[VG33E]
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SEF242YD
EC-692
[VG33E]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
PFP:00031
Description
UBS00DFE
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
UBS00DFF
●
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
UBS00DFG
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1.
Perform
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-693, "Diagnostic Procedure"
.
SEF601Z
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-693
[VG33E]
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Diagnostic Procedure
UBS00DFH
LEC089A
EC-694
[VG33E]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
SEF768Z
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