Infiniti QX56 (Z62). Manual - part 524

 

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Infiniti QX56 (Z62). Manual - part 524

 

 

EC-74

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

ECM

INT/V SOL (B2)

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

0 - 2%

2,000 rpm

Approx. 0 - 50%

AIR COND RLY

• Engine: After warming up, idle 

the engine

A/C switch: OFF

OFF

A/C switch: ON
(Compressor operates)

ON

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

ON

A/F S1 HTR (B1)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

HO2S2 HTR (B1)

• Engine speed: 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

HO2S2 HTR (B2)

• Engine speed: 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

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as 
the tachometer indication

VEHICLE SPEED

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as 
the speedometer indication

IDL A/V LEARN

• Engine: Running

Idle air volume learning has not been per-
formed yet.

YET

Idle air volume learning has already been 
performed successfully.

CMPLT

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has illumi-
nated.

0 - 65,535 km
(0 - 40,723 miles)

SNOW MODE SW

• Ignition switch: ON

Snow mode switch: ON

ON

Snow mode switch: OFF

OFF

ENG OIL TEMP

• Engine: After warming up

More than 70

°

C (158

°

F)

MAIN SW

• Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

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
(ASCD/ICC brake 
switch)

• Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

Monitor Item

Condition

Values/Status

ECM

EC-75

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

BRAKE SW2
(Stop lamp switch)

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

DIST SW

• Ignition switch: ON

DISTANCE switch: Pressed

ON

DISTANCE switch: Released

OFF

CRUISE LAMP

• Ignition switch: ON

MAIN switch: Pressed at the 1st time 

 

at the 2nd time

ON 

 OFF

AC EVA TEMP

• Engine: Running

Indicates A/C evaporator 
temperature sent from“uni-
fied meter and A/C amp.”.

AC EVA TARGET

• Engine: Running

Indicates target A/C evapo-
rator temperature sentfrom 
“unified meter and A/C 
amp.”.

FAN DUTY

• Engine: Running

0 - 100%

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle

• Battery: Fully charged*

2

• Selector lever: P or N position
• A/C switch: OFF
• No  load

Approx. 2,600 - 3,500 mV

A/F ADJ-B1

• Engine: Running

0.330 - 0.330

A/F ADJ-B2

• Engine: Running

0.330 - 0.330

P/N POSI SW

• Ignition switch: ON

Selector lever: P or N

ON

Selector lever: Except above position

OFF

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air temper-
ature

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

FUEL PRES SEN

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 2.74 Mpa

2,000 rpm

Approx. 3.0 Mpa

FUEL INJ B1

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 1.4 msec

2,000 rpm

Approx. 1.0 msec

FUEL INJ B2

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 1.4 msec

2,000 rpm

Approx. 1.0 msec

INT/V TIM (B1)

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

5 - 5

°

CA

2,000 rpm

Approx. 0 - 30

°

CA

INT/V TIM (B2)

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

5 - 5

°

CA

2,000 rpm

Approx. 0 - 30

°

CA

MAP SENSOR

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 1.0 V

2,000 rpm

Approx. 1.35 V

EVAP LEAK DIAG

• Ignition switch: ON

Indicates the condition of 
EVAP leak diagnosis.

Monitor Item

Condition

Values/Status

EC-76

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

ECM

EVAP DIAG READY

• Ignition switch: ON

Indicates the ready condi-
tion of EVAP leak diagnosis.

VVEL LEARN

• Ignition switch: OFF 

 ON

(After warming up)

VVEL learning has not been performed 
yet.

YET

VVEL learning has already been per-
formed successfully.

DONE

VVEL SEN LEARN-B1

• VVEL learning has already been performed successfully

Approx. 0.30 - 0.80 V

VVEL SEN LEARN-B2

• VVEL learning has already been performed successfully

Approx. 0.30 - 0.80 V

VVEL POSITION SEN-
B1

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 0.25 - 1.50 V

When revving engine up to 2,000 rpm 
quickly

Approx. 0.25 - 4.75 V

VVEL POSITION SEN-
B2

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

Approx. 0.25 - 1.50 V

When revving engine up to 2,000 rpm 
quickly

Approx. 0.25 - 4.75 V

VVEL TIM-B1

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 0 - 23 deg

When revving engine up to 2,000 rpm 
quickly

Approx. 0 - 90 deg

VVEL TIM-B2

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 0 - 23 deg

When revving engine up to 2,000 rpm 
quickly

Approx. 0 - 90 deg

FPCM

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

• Engine: Cranking

HI

• Revving engine from idle to 4,000 rpm 

quickly

MID

• Engine: Idle
• Engine coolant temperature: More than 

10

°

C (50

°

F)

LOW

BAT TEMP SEN

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Indicates the temperature 
around the battery.

COOLING FAN SPD

• Engine speed: Idle
• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Water temp: Less than 98

°

C

Approx. 100 – 200 rpm

Water temp: More than 98

°

C

Approx. 600 – 700 rpm

THRTL STK CNT B1

NOTE:
The item is indicated, but not used.

HO2 S2 DIAG2(B1)

NOTE:
The item is indicated, but not used.

HO2 S2 DIAG2(B2)

NOTE:
The item is indicated, but not used.

FUEL INJ TIMG

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 16 deg

2,000 rpm

Approx. 

170 deg

H/P FUEL PUMP DEG

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 211.0 deg

2,000 rpm

Approx. 206.0 deg

Monitor Item

Condition

Values/Status

ECM

EC-77

< ECU DIAGNOSIS INFORMATION >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*1: 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.

*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-159, "How to Handle Battery"

.

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:
• Specification data are reference values and are measured between each terminals.
• Pulse signal is measured by CONSULT-III.

FUEL PRES SEN V

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 1150 mV

2,000 rpm

Approx. 1200 mV

L/FUEL PRES SEN

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 0.45 MPa

2,000 rpm

Approx. 0.45 MPa

L/FUEL PRES SEN V

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Approx. 3250 mV

3,000 rpm

Approx. 3100 mV

ECM TEMP 1

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Indicates the temperature of 
ECM internal circuit 1.

ECM TEMP 2

• Engine: After warming up
• Selector lever: P or N position
• A/C switch: OFF
• No  load

Idle

Indicates the temperature of 
ECM internal circuit 2.

FUEL PUMP DUTY

• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No  load

Engine speed: Idle

30 - 40%

Monitor Item

Condition

Values/Status

JPBIA3371ZZ

 

 

 

 

 

 

 

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