Infiniti FX35 / FX45. Manual - part 342

TROUBLE DIAGNOSIS

EC-129

< SERVICE INFORMATION >

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C

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EC

N

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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 >

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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.

Perform 

EC-80, "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 “SPEC” of “DATA
MONITOR” mode with CONSULT-III.

4.

Make sure that monitor items are within the SP value.

5.

If NG, go to 

EC-131, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001325943

OVERALL SEQUENCE

EC-132

< SERVICE INFORMATION >

[VQ35DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

PBIB2268E