Nissan Frontier D40. Manual — part 427
ECM
EC-399
< ECU DIAGNOSIS >
[QR25DE]
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
ECM Harness Connector Terminal Layout
INFOID:0000000005273432
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion
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
(ASCD brake switch)
• Ignition switch: ON
• Brake pedal: Fully released (A/T)
• Clutch pedal and/or brake pedal: Fully
released (M/T)
ON
• Brake pedal: Slightly depressed (A/T)
• Clutch pedal and/or brake pedal:
Slightly depressed (M/T)
OFF
BRAKE SW2
(STOP lamp switch)
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
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
ALT DUTY
• Engine: Idle
0 - 80%
BAT CUR SEN
• Engine: Idle
• Battery: Fully charged*
2
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500mV
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
PBIB1192E
EC-400
< ECU DIAGNOSIS >
[QR25DE]
ECM
ECM Terminal and Reference Value
INFOID:0000000005273433
PREPARATION
ECM located in the engine room passenger side behind reservoir
tank.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
BBIA0537E
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
BR
ECM ground
[Engine is running]
• Idle speed
Body ground
2
Y
A/F sensor 1 heater
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 5V
3
V
Throttle control motor power
supply
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
4
L/W
Throttle control motor (Close)
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
0 - 14V
5
L/B
Throttle control motor
(Open)
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
0 - 14V
PBIB1584E
PBIB0534E
PBIB0533E
ECM
EC-401
< ECU DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
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EC
N
P
O
11
LG
Intake valve timing control
solenoid valve
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
7 - 10V
12
P
Power steering pressure
sensor
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.0V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8V
13
G
Crankshaft position sensor
(POS)
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle.
Approximately 3.0V
[Engine is running]
• Engine speed: 2,000 rpm
Approximately 3.0V
14
Y
Camshaft position sensor
(PHASE)
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle.
1.0 - 4.0V
[Engine is running]
• Engine speed: 2,000 rpm
1.0 - 4.0V
15
W
Knock sensor
[Engine is running]
• Idle speed
Approximately 2.5V
16
V
A/F sensor 1
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 3.1V
35
O
Approximately 2.6V
56
W
Approximately 2.3V
75
L
Approximately 2.3V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1790E
PBIB0527E
PBIB0528E
PBIB0525E
PBIB0526E
EC-402
< ECU DIAGNOSIS >
[QR25DE]
ECM
22
23
41
42
LG
SB
R
O
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 4
Fuel injector No. 2
[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)
25
P
Heated oxygen sensor 2
heater
[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 on load
Approximately 5V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
32
GR
EVAP control system pres-
sure sensor
[Ignition switch: ON]
Approximately 1.8 - 4.8V
34
BR
Intake air temperature
sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
45
R
EVAP canister purge volume
control solenoid valve
[Engine is running]
• Idle speed
• Accelerator pedal: 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)
Approximately 1V
47
L
Sensor power supply
(Throttle position sensor)
[Ignition switch: ON]
Approximately 5V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0529E
PBIB0530E
SEC981D
PBIB0050E
PBIB2652E
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