Infiniti FX35, FX50 (S51). Manual — part 740
ECM
EC-501
< ECU DIAGNOSIS INFORMATION >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g·m/s
2,500 rpm
7.0 - 20.0 g·m/s
PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)
0%
2,000 rpm
—
INT/V TIM (B1)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner 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
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 30
°
CA
EXH/V TIM B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
Around 2,500 rpm while the engine speed
is rising
Approx. 0
°
- 30
°
CA
EXH/V TIM B2
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
Around 2,500 rpm while the engine speed
is rising
Approx. 0
°
- 30
°
CA
INT/V SOL (B1)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
INT/V SOL (B2)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
VTC DTY EX B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
Around 2,500 rpm while the engine speed
is rising
Approx. 0% - 70%
VTC DTY EX B2
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
Around 2,500 rpm while the engine speed
is rising
Approx. 0% - 70%
TP SEN 1-B2
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
TP SEN 2-B2*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
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
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
Monitor Item
Condition
Values/Status
EC-502
< ECU DIAGNOSIS INFORMATION >
[VQ35HR]
ECM
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
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 indi-
cation.
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
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)
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has illumi-
nated.
0 - 65,535 km
(0 - 40,723 miles)
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%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer indi-
cation.
Almost the same speed as
the speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating
The preset vehicle speed is
displayed
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
(ICC/ASCD brake
switch)
• Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
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
VHCL SPD CUT
• Ignition switch: ON
NON
Monitor Item
Condition
Values/Status
ECM
EC-503
< ECU DIAGNOSIS INFORMATION >
[VQ35HR]
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
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
• ECM is located behind the instrument assist lower panel. For this inspection, remove passenger side instru-
ment lower panel.
• Specification data are reference values and are measured between each terminal and ground.
• Pulse signal is measured by CONSULT-III.
LO SPEED CUT
• Ignition switch: ON
NON
AT OD MONITOR
• Ignition switch: ON
OFF
AT OD CANCEL
• Ignition switch: ON
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 40
km/h (25 MPH) and 144 km/h (89
MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
EXH V/T LEARN
• Engine: Running
Exhaust Valve Timing Control Learning
has not been performed yet.
YET
Exhaust Valve Timing Control Learning
has not been performed yet.
CMPLT
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
ALT DUTY
• Engine: Idle
0 - 80%
A/F ADJ-B1
• Engine: Running
−
0.330 - 0.330
A/F ADJ-B2
• Engine: Running
−
0.330 - 0.330
FAN DUTY
• Engine: Running
0 - 100%
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
Monitor Item
Condition
Values/Status
JMBIA0070ZZ
EC-504
< ECU DIAGNOSIS INFORMATION >
[VQ35HR]
ECM
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
1
(W)
128
(B)
A/F sensor 1 heater
(bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after start-
ing engine)
2.9 - 8.8 V
2
(G)
128
(B)
Throttle control motor
(Open) (bank 1)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed
0 - 14 V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released
0 - 14 V
3
(R)
128
(B)
Throttle control motor relay
power supply (bank 1)
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
4
(BR)
128
(B)
Throttle control motor
(Close) (bank 1)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: In the middle of
releasing operation
0 - 14 V
5
(GR)
128
(B)
A/F sensor 1 heater
(bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after start-
ing engine)
2.9 - 8.8 V
6
(SB)
128
(B)
Exhaust valve timing con-
trol magnet retarder (bank
1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Around 2,500 rpm while the engine
speed is rising
7 - 12 V
JMBIA0030GB
JMBIA0031GB
JMBIA0032GB
JMBIA0033GB
JMBIA0030GB
JMBIA0034GB
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