Infiniti FX35 / FX45. Manual — part 342
TROUBLE DIAGNOSIS
EC-129
< SERVICE INFORMATION >
[VQ35DE]
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PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm
—
INT/V TIM(B1)
INT/V TIM(B2)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
When revving engine up to 2,000 rpm
quickly
Approx. 0
°
- 30
°
CA
INT/V SOL(B1)
INT/V SOL(B2)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
When revving engine up to 2,000 rpm
quickly
Approx. 0% - 50%
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
FUEL PUMP RLY
• For 1 second after turning ignition switch ON
• Engine running or cranking
ON
• Except above conditions
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature is 97
°
C
(207
°
F) or less
OFF
Engine coolant temperature is be-
tween 98
°
C (208
°
F) and 99
°
C (210
°
F)
LOW
Engine coolant temperature is be-
tween 100
°
C (212
°
F) and 104
°
C
(219
°
F)
MID
Engine coolant temperature is 105
°
C
(221
°
F) or more
HI
HO2S2 HTR (B1)
HO2S2 HTR (B2)
• Engine speed is below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as the
speedometer indication
VEHICLE SPEED
• Turn drive wheels and compare the CONSULT-III value with speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has
turned ON.
0 - 65,535 km
(0 - 40,723 mile)
SNOW MODE SW
• Ignition switch: ON
Snow mode switch: ON
ON
Snow mode switch: OFF
OFF
A/F S1 HTR(B1)
A/F S1 HTR(B2)
• Engine: After warming up, idle the engine
0 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON
(Compressor operates)
1.0 - 4.0V
VHCL SPEED SE
• Turn drive wheels and compare speedometer indication with the CON-
SULT-III value.
Almost the same speed as the
CONSULT-III value
SET VHCL SPD
• Engine: Running
ASCD: Operating.
The preset vehicle speed is dis-
played.
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
EC-130
< SERVICE INFORMATION >
[VQ35DE]
TROUBLE DIAGNOSIS
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
BRAKE SW1
• Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW2
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
DIST SW
• Ignition switch: ON
DISTANCE switch: Depressed
ON
DISTANCE switch: Released
OFF
CRUISE LAMP
• Ignition switch: ON
MAIN switch: pressed at the 1st time
→
at the 2nd time
ON
→
OFF
SET LAMP
• MAIN switch: ON
• When vehicle speed is between
40km/h (25MPH) and 144km/h
(89MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-131
< SERVICE INFORMATION >
[VQ35DE]
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description
INFOID:0000000001325940
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
of “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the
value in “SPEC” of “DATA MONITOR” 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 correc-
tion)
• 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
INFOID:0000000001325941
• 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 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
INFOID:0000000001325942
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1.
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 “SPEC” of “DATA
MONITOR” mode with CONSULT-III.
4.
Make sure that monitor items are within the SP value.
5.
If NG, go to
Diagnosis Procedure
INFOID:0000000001325943
OVERALL SEQUENCE
EC-132
< SERVICE INFORMATION >
[VQ35DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
PBIB2268E
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