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Nissan Frontier D40. Manual - part 549

ECM

EC-887

< ECU DIAGNOSIS >

[VQ40DE]

COOLING FAN

• Engine: After warming up, idle the

engine

• Air conditioner switch: OFF

Engine coolant temperature: 97

(207

F) or less

OFF

Engine coolant temperature: Between
98

C (208

F) and 104

C (219

LOW

Engine coolant temperature: 105

(221

F) or more

HO2S2 HTR (B1)
HO2S2 HTR (B2)

• 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

• Engine speed: Above 3,600 rpm

OFF

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as the
speedometer indication

VEHICLE SPEED

• Turn drive wheels and compare the CONSULT-III value with speedometer

indication.

Almost the same speed as the
speedometer indication

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has
turned ON.

0 - 65,535 km
(0 - 40,723 mile)

A/F S1 HTR (B1)
A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

4 - 100%

AC PRESS SEN

• Engine: Idle
• Both A/C switch blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

VHCL SPEED SE

• Turn drive wheels and compare speedometer indication with the CON-

SULT-III value.

Almost the same speed as the
CONSULT-III value

SET VHCL SPD

• Engine: Running

ASCD: Operating.

The preset vehicle speed is dis-
played.

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

• Ignition switch: ON

Brake pedal: Fully released

Brake pedal: Slightly depressed

OFF

BRAKE SW2

• 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

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

ASCD: Operating

ASCD: Not operating

OFF

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle

• Battery: Fully charged*

• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load

Approx. 2,600 - 3,500 mV

MONITOR ITEM

CONDITION

SPECIFICATION

EC-888

< ECU DIAGNOSIS >

[VQ40DE]

ECM

*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:0000000005273895

ECM Terminal and Reference Value

INFOID:0000000005273896

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 ECMs transistor. Use a ground other than ECM terminals, such as the ground.

ALT DUTY SIG

• Power generation voltage variable control: Operating

• Power generation voltage variable control: Not operating

OFF

HO2 S2 DIAG1 (B1)

DTC P0139 self-diagnosis (delayed response) is incomplete.

INCMP

DTC P0139 self-diagnosis (delayed response) is complete.

CMPLT

HO2 S2 DIAG1 (B2)

DTC P0159 self-diagnosis (delayed response) is incomplete.

INCMP

DTC P0159 self-diagnosis (delayed response) is complete.

CMPLT

HO2 S2 DIAG2 (B1)

DTC P0139 self-diagnosis (slow response) is incomplete.

INCMP

DTC P0139 self-diagnosis (slow response) is complete.

CMPLT

HO2 S2 DIAG2 (B2)

DTC P0159 self-diagnosis (slow response) is incomplete.

INCMP

DTC P0159 self-diagnosis (slow response) is complete.

CMPLT

MONITOR ITEM

CONDITION

SPECIFICATION

MBIB0045E

BBIA0537E

ECM

EC-889

< ECU DIAGNOSIS >

[VQ40DE]

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

ECM ground

[Engine is running]
• Idle speed

Body ground

A/F sensor 1 heater (Bank 1)

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

(More than 140 seconds after starting en-
gine)

Approximately 2.9 - 8.8V

Throttle control motor relay
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), 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), 1st (M/T)
• Accelerator pedal: Fully depressed

0 - 14V

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)

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: 2,500 rpm

7 - 12V

PBIA8148J

PBIB1104E

PBIB1105E

PBIB1790E

EC-890

< ECU DIAGNOSIS >

[VQ40DE]

ECM

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: 2,500 rpm

7 - 12V

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

Crankshaft position sensor
(POS)

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

NOTE:
The pulse cycle changes depending on rpm
at idle

Approximately 10V

[Engine is running]
• Engine speed: 2,000 rpm

Approximately 10V

Camshaft position sensor
(PHASE) (Bank 2)

[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
(Bank 1)

[Engine is running]
• Idle speed

Approximately 2.5V

A/F sensor 1 (Bank 2)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

Approximately 1.8V
Output voltage varies with air fuel
ratio.

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1790E

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

Content .. 547 548 549 550 ..