Nissan Frontier D40. Manual - part 427

ECM

EC-399

< ECU DIAGNOSIS >

[QR25DE]

*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

PG-4, "How to Handle Battery"

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

MAIN switch: Released

OFF

CANCEL SW

• Ignition switch: ON

CANCEL switch: Pressed

CANCEL switch: Released

OFF

RESUME/ACC SW

• Ignition switch: ON

RESUME/ACCELERATE switch:
Pressed

RESUME/ACCELERATE switch: Re-
leased

OFF

SET SW

• Ignition switch: ON

SET/COAST switch: Pressed

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)

• 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

CRUISE LAMP

• Ignition switch: ON

MAIN switch: Pressed at the 1st time

→

at the 2nd time

→

OFF

SET LAMP

• MAIN switch: ON
• When vehicle speed is between

40 km/h (25 MPH) and 144 km/h (89
MPH)

ASCD: Operating

ASCD: Not operating

OFF

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine: Idle

• Battery: Fully charged*

• 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

• 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)

ECM ground

[Engine is running]
• Idle speed

Body ground

A/F sensor 1 heater

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 5V

Throttle control motor power
supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

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

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]

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

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

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

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

Knock sensor

[Engine is running]
• Idle speed

Approximately 2.5V

A/F sensor 1

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 3.1V

Approximately 2.6V

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)

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)

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

Intake air temperature
sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.

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

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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