Nissan Frontier D40. Instruction — part 428
ECM
EC-403
< ECU DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
48
SB
Sensor power supply
(EVAP control system pres-
sure sensor)
[Ignition switch: ON]
Approximately 5V
49
P
Sensor power supply
(Refrigerant pressure
sensor, Battery current sen-
sor)
[Ignition switch: ON]
Approximately 5V
50
W
Throttle position sensor 1
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
Less than 4.75V
51
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 - 1.9V
61
62
80
81
L
Y
GR
G
Ignition signal No. 3
Ignition signal No. 1
Ignition signal No. 4
Ignition signal No. 2
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle.
0 - 0.1V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
0 - 0.2V
66
B
Sensor ground
(Throttle position sensor)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
67
B
Sensor ground
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
68
G
Sensor power supply
(Power steering pressure
sensor)
[Ignition switch: ON]
Approximately 5V
69
R
Throttle position sensor 2
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
Less than 4.75V
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
More than 0.36V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0521E
PBIB0522E
EC-404
< ECU DIAGNOSIS >
[QR25DE]
ECM
70
BR
Refrigerant pressure sensor
[Engine is running]
• Warm-up condition
• Both A/C switch and blower fan switch: ON
(Compressor operates)
1.0 - 4.0V
71
R
Battery current sensor
[Engine is running]
• Battery: Fully charged
*1
• Idle speed
Approximately 2.6 - 3.5V
73
Y
Engine coolant temperature
sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with engine
coolant temperature.
74
W
Heated oxygen sensor 2
[Engine is running]
• Revving engine from idle up 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
78
B
Sensor ground
(Heated oxygen sensor 2)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
82
B
Sensor ground
(Accelerator pedal position
sensor 1)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
83
B
Sensor ground
(Accelerator pedal position
sensor 2)
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
85
W
DATA link connector
—
—
86
P
CAN communication line
—
—
90
L
Sensor power supply
(Accelerator pedal position
sensor 1)
[Ignition switch: ON]
Approximately 5V
91
G
Sensor power supply
(Accelerator pedal position
sensor 2)
[Ignition switch: ON]
Approximately 5V
94
L
CAN communication line
—
—
98
GR
Accelerator pedal position
sensor 2
[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully released
0.3 - 0.45V
[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully depressed
Less than 2.4V
99
SB
ASCD steering switch
[Ignition switch: ON]
• ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]
• MAIN switch: Pressed
Approximately 0V
[Ignition switch: ON]
• CANCEL switch: Pressed
Approximately 1V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: Pressed
Approximately 3V
[Ignition switch: ON]
• SET/COAST switch: Pressed
Approximately 2V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
ECM
EC-405
< ECU DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
101
LG
Stop lamp switch
[Ignition switch: ON]
• Brake pedal: Fully released
Approximately 0V
[Ignition switch: ON]
• Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
102
O
*2
G
*3
PNP signal
[Ignition switch: ON]
• Shift lever: P or N (A/T), Neutral (M/T)
Approximately 0V
[Ignition switch: ON]
• Shift lever: Except above
BATTERY VOLTAGE
(11 - 14V)
104
O
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
106
R
Accelerator pedal position
sensor 1
[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully released
0.6 - 0.95V
[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully depressed
Less than 4.75V
107
Y
Fuel tank temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
108
LG
ASCD brake switch
[Ignition switch: ON]
• Brake pedal: Slightly depressed (A/T)
• Clutch pedal and/or clutch pedal:
Slightly depressed (M/T)
Approximately 0V
[Ignition switch: ON]
• Brake pedal: Fully released (A/T)
• Clutch pedal and brake pedal:
Fully released (M/T)
BATTERY VOLTAGE
(11 - 14V)
109
W/R
Ignition switch
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
111
BR
ECM relay (Self shut-off)
[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF
0 - 1.0V
[Ignition switch: OFF]
• More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
113
V
Fuel pump relay
[Ignition switch: ON]
• For 1 second after turning ignition switch
ON
[Engine is running]
0 - 1.0V
[Ignition switch: ON]
• More than 1 second after turning ignition
switch ON
BATTERY VOLTAGE
(11 - 14V)
115
116
B
GR
ECM ground
[Engine is running]
• Idle speed
Body ground
117
G
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
119
120
R
P
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
121
R/B
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
EC-406
< ECU DIAGNOSIS >
[QR25DE]
ECM
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*1: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
*2: M/T models
*3: A/T models
Wiring Diagram
INFOID:0000000005273434
ABBWA0346GB
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