Infiniti FX35, FX50 (S51). Manual — part 899
ECM
EC-1137
< ECU DIAGNOSIS INFORMATION >
[VK50VE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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 terminals.
• Pulse signal is measured by CONSULT-III.
JMBIA0070ZZ
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
1
(P)
128
(B)
Throttle control motor power
supply (bank 2)
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
2
(L)
128
(B)
Throttle control motor (bank 2)
(Open)
Output
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed
0 - 14 V
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released
0 - 14 V
3
(Y)
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
4
(G)
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
JMBIA0031GB
JMBIA0032GB
JMBIA0030GB
JMBIA0030GB
EC-1138
< ECU DIAGNOSIS INFORMATION >
[VK50VE]
ECM
5
(R)
128
(B)
Throttle control motor (bank 2)
(Close)
Output
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: In the middle of
releasing operation
0 - 14 V
6
(GR)
—
ECM ground
—
—
—
8
(W)
128
(B)
EVAP canister purge volume
control solenoid valve
Output
[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed
even slightly, after engine starting
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Engine speed: About 2,000 rpm
(More than 100 seconds after start-
ing engine)
BATTERY VOLTAGE
(11 - 14 V)
9
(G)
128
(B)
Ignition signal No. 2
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending
on rpm at idle
0 - 0.2 V
10
(Y)
Ignition signal No. 1
13
(V)
Ignition signal No. 3
14
(GR)
Ignition signal No. 4
18
(SB)
Ignition signal No. 5
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
0.1 - 0.4 V
22
(LG)
Ignition signal No. 6
26
(L)
Ignition signal No. 7
30
(Y)
Ignition signal No. 8
15
(O)
128
(B)
ECM relay (Self shut-off)
Output
[Engine is running]
[Ignition switch: OFF]
• A few seconds after turning ignition
switch OFF
0 - 1.5 V
[Ignition switch: OFF]
• More than a few seconds after turn-
ing ignition switch OFF
BATTERY VOLTAGE
(11 - 14 V)
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JMBIA0033GB
JMBIA0039GB
JMBIA0040GB
PBIB0044E
PBIB0045E
ECM
EC-1139
< ECU DIAGNOSIS INFORMATION >
[VK50VE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
17
(R)
128
(B)
Fuel injector No. 3
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending
on rpm at idle
BATTERY VOLTAGE
(11 - 14 V)
21
(W)
Fuel injector No. 2
25
(P)
Fuel injector No. 1
29
(O)
Fuel injector No. 7
33
(G)
Fuel injector No. 8
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14 V)
37
(BR)
Fuel injector No. 4
41
(W)
Fuel injector No. 5
45
(V)
Fuel injector No. 6
19
(L)
128
(B)
Throttle control motor relay
Output
[Ignition switch: ON
→
OFF]
0 - 1.0 V
↓
BATTERY VOLTAGE
(11 - 14 V)
↓
0 V
[Ignition switch: ON]
0 - 1.0 V
23
(BR)
—
Sensor ground
(Engine coolant temperature
sensor)
—
—
—
24
(Y)
23
(BR)
Engine coolant temperature
sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with engine
coolant temperature.
31
(B)
—
Sensor ground
(Heated oxygen sensor 2)
—
—
—
32
(W)
31
(B)
Heated oxygen sensor 2
(bank 1)
Input
[Engine is running]
• Revving engine from idle to 3,000
rpm quickly after the following condi-
tions 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
0 - 1.0 V
34
(V)
—
Sensor ground
(Engine oil temperature sen-
sor)
—
—
—
35
(B/W)
—
Sensor ground
(Knock sensor)
—
—
—
36
(LG)
31
(B)
Heated oxygen sensor 2
(bank 2)
Input
[Engine is running]
• Revving engine from idle to 3,000
rpm quickly after the following condi-
tions 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
0 - 1.0 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
PBIB0042E
PBIB0043E
EC-1140
< ECU DIAGNOSIS INFORMATION >
[VK50VE]
ECM
38
(GR)
—
Sensor ground
[Mass air flow sensor (bank 2)]
—
—
—
39
(R)
34
(V)
Engine oil temperature sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with engine
oil temperature.
40
(W)
35
(B/W)
Knock sensor (bank 1)
Input
[Engine is running]
• Idle speed
2.5 V*
1
42
(B)
—
Sensor ground
[Mass air flow sensor (bank 1)/
Intake air temperature sensor]
—
—
—
43
(SB)
38
(GR)
Mass air flow sensor (bank 2)
Input
[Engine is running]
• Warm-up condition
• Idle speed
0.8 - 1.1 V
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
1.3 - 1.6 V
44
(W)
35
(B/W)
Knock sensor (bank 2)
Input
[Engine is running]
• Idle speed
2.5 V*
1
47
(L)
42
(B)
Mass air flow sensor (bank 1)
Input
[Engine is running]
• Warm-up condition
• Idle speed
0.8 - 1.1 V
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
1.3 - 1.6 V
48
(Y)
42
(B)
Intake air temperature sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with intake
air temperature.
49
(V)
128
(B)
Throttle control motor power
supply (bank 1)
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
50
(G)
128
(B)
Throttle control motor (bank 1)
(Open)
Output
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed
0 - 14 V
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released
0 - 14 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JMBIA0031GB
JMBIA0032GB
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