Infiniti M35/M45 Y50. Manual - part 417

TROUBLE DIAGNOSIS

EC-141

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Major Sensor Reference Graph in Data Monitor Mode

NBS004TA

The following are the major sensor reference graphs in “DATA MONITOR” mode.

CLSD THL POS, ACCEL SEN 1, THRTL SEN 1

Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with selector lever in D position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.

ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), INJ PULSE-B1

Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)” and “INJ PULSE-B1”
when revving engine quickly up to 4,800 rpm under no load after warming up engine sufficiently.
Each value is for reference, the exact value may vary.

PBIB0198E

PBIB2445E

EC-142

[VQ35DE]

TROUBLE DIAGNOSIS

PBIB2099E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-143

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

PFP:00031

Description

NBS004TB

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

NBS004TC

●

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

●

Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

2

 , 14.25 - 15.12 psi)

●

Atmospheric temperature: 20 - 30

°

C (68 - 86

°

F)

●

Engine coolant temperature: 75 - 95

°

C (167 - 203

°

F)

●

Transmission: Warmed-up

–

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 (140

°

F).

●

Electrical load: Not applied

–

Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

●

Engine speed: Idle

Inspection Procedure

NBS004TD

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1.

Perform 

EC-78, "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-144, "Diagnostic Procedure"

 .

SEF601Z

EC-144

[VQ35DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Diagnostic Procedure

NBS004TE

OVERALL SEQUENCE

PBIB2268E