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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