Nissan Frontier. Manual — part 491
ECM
EC-535
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
31
BR
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
• More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
33
46
48
SB
W
LG
Fuel injector No. 1
Fuel injector No. 5
Fuel injector No. 3
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
34
O
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
37
P
Heated oxygen sensor 2
heater (Bank 1)
[Engine is running]
• 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
0 - 1.0V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
39
G
VIAS control solenoid valve
[Engine is running]
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Engine speed: Between 2,200 and 3,300
rpm
0 - 1.0V
41
R
Heated oxygen sensor 2
heater (Bank 2)
[Engine is running]
• 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
0 - 1.0V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC984C
SEC985C
EC-536
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
ECM
42
Y
EVAP canister purge volume
control solenoid valve
[Engine is running]
• Idle speed
• Accelerator pedal is not depressed even
slightly, after engine starting
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)
BATTERY VOLTAGE
(11 - 14V)
43
V
Fuel pump relay
[Ignition switch: ON]
• For 1 second after turning ignition switch
ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
• More than 1 second after turning ignition
switch ON
BATTERY VOLTAGE
(11 - 14V)
44
45
47
O
V
R
Fuel injector No. 2
Fuel injector No. 6
Fuel injector No. 4
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
49
GR
Intake manifold runner con-
trol valve motor power supply
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
50
BR
Intake manifold runner con-
trol valve motor (Open)
[Ignition switch: ON]
• Engine coolant temperature: Between –
12
°C (10°F) and 20°C (68°F)
• Accelerator pedal: Fully released
→ de-
pressed
Battery voltage appears for about
1 second.
53
Y
Intake manifold runner con-
trol valve motor (Close)
[Ignition switch: ON]
• Engine coolant temperature: Between –
12
°C (10°F) and 20°C (68°F)
• Accelerator pedal: Depressed
→ fully re-
leased
Battery voltage appears for about
1 second.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC990C
SEC991C
SEC984C
SEC985C
ECM
EC-537
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
54
O
Sensor power supply (Intake
manifold runner control valve
position sensor)
[Ignition switch: ON]
Approximately 5.0 V
55
L
Intake valve timing control so-
lenoid valve (Bank 1)
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
7 - 12V
56
B
Intake valve timing control so-
lenoid valve (Bank 2)
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
7 - 12V
57
W
Heated oxygen sensor 2
(Bank 1)
[Engine is running]
• Revving engine from idle to 3,000 rpm
quickly 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
0 - Approximately 1.0V
58
G
Heated oxygen sensor 2
(Bank 2)
[Engine is running]
• Revving engine from idle to 3,000 rpm
quickly 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
0 - Approximately 1.0V
59
GR
Sensor ground
(Heated oxygen sensor 2)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
63
BR
Refrigerant pressure sensor
[Engine is running]
• Warm-up condition
• Both A/C switch and blower switch: ON
(Compressor operates)
1.0 - 4.0V
64
LG
Sensor ground
(Refrigerant pressure sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
65
P
Power steering pressure sen-
sor
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.5V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
JMBIA1638GB
JMBIA1638GB
EC-538
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
ECM
66
R
Battery current sensor
[Engine is running]
• Battery: Fully charged
*1
• Idle speed
Approximately 2.6 - 3.5V
68
B
Sensor ground
(Battery current sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
69
O/L
A/F sensor 1 (Bank 1)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
Approximately 2.2V
Output voltage varies with air fuel
ratio.
70
Y
Engine coolant temperature
sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with engine
coolant temperature.
72
R
Sensor ground
(Power steering pressure
sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
73
W/L
A/F sensor 1 (Bank 1)
[Ignition switch: ON]
Approximately 1.8V
74
SB
Intake air temperature sensor [Engine is running]
Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
75
P
Sensor power supply
(Battery current sensor)
[Ignition switch: ON]
Approximately 5V
76
BR
Sensor ground
(Engine coolant temperature
sensor, Engine oil tempera-
ture sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
77
BR
A/F sensor 1 (Bank 2)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
Approximately 2.2V
Output voltage varies with air fuel
ratio.
78
V
Engine oil temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with engine
oil temperature.
79
G
Sensor power supply
(Power steering pressure
sensor)
[Ignition switch: ON]
Approximately 5V
80
B
Sensor ground
(Mass air flow sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
81
B/R
A/F sensor 1 (Bank 2)
[Ignition switch: ON]
Approximately 1.8V
82
P
Mass air flow sensor
[Engine is running]
• Warm-up condition
• Idle speed
0.9 - 1.2V
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
1.5 - 1.8V
84
LG
Sensor ground
(Intake manifold runner con-
trol valve position sensor)
—
—
85
W
Knock sensor
(Bank 1)
[Engine is running]
• Idle speed
Approximately 2.5V
86
W
Knock sensor
(Bank 2)
[Engine is running]
• Idle speed
Approximately 2.5V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
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