2006 INFINITI M35 Factory Service Manual

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Page 2409 of 5621

INFINITI M35 2006 Factory Service Manual EC-866
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TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Major Sensor Reference Graph in Data Monitor ModeNBS005AQ
The following are the major sensor reference graphs in “DATA MONITOR”

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INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS
EC-867
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Revision: 2006 January2006 M35/M45
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INFINITI M35 2006 Factory Service Manual EC-868
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 January2006 M35/M45
TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionNBS005AR
The specification (SP) value indicates t

EC-868
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 January2006 M35/M45
TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionNBS005AR
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 ConditionNBS005AS
Vehicle driven distance: More than 5,000 km (3,107 miles)
Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2 , 14.25 - 15.12 psi)
Atmospheric temperature: 20 - 30C (68 - 86F)
Engine coolant temperature: 75 - 95C (167 - 203F)
Transmission: Warmed-up*1
Electrical load: Not applied*2
Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SE 1” (A/T
fluid temperature sensor signal) indicates more than 60
C (140F).
*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
Inspection ProcedureNBS005AT
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-788, "
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-869, "
Diagnostic Procedure" .
SEF601Z

Page 2412 of 5621

INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-869
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Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNBS005AU
OVERALL SEQUENCE
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INFINITI M35 2006 Factory Service Manual EC-870
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 January2006 M35/M45
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INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-871
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Revision: 2006 January2006 M35/M45
DETAILED PROCEDURE
1. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.

Page 2415 of 5621

INFINITI M35 2006 Factory Service Manual EC-872
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2006 January2006 M35/M45
5. CHANGE ENGINE OIL
1. Stop the engine.
2. Change engine oil.
NOTE:
This symptom may occur when a larg

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INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-873
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Revision: 2006 January2006 M35/M45
10. DETECT MALFUNCTIONING PART
1. Check the following.
–Ignition coil and its cir

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