Nissan Frontier. Manual - part 612

 

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Nissan Frontier. Manual - part 612

 

 

ECM

EC-1019

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR MEXICO]

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EC

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COOLING FAN

• Engine: After warming up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature: 97

°C 

(207

°F) or less

OFF

Engine coolant temperature: Between 
98

°C (208°F) and 104°C (219°F)

LOW

Engine coolant temperature: 105

°C 

(221

°F) or more

HI

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

ON

• 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 value with speedometer in-

dication.

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 CONSULT 

value.

Almost the same speed as the 
CONSULT value

SET VHCL SPD

• Engine: Running

ASCD: Operating.

The preset vehicle speed is dis-
played.

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

• Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW2

• 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 

40km/h (25MPH) and 144km/h 
(89MPH)

ASCD: Operating

ON

ASCD: Not operating

OFF

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle
• Battery: Fully charged*

2

• Shift lever: P or N
• Air conditioner switch: OFF
• No load

Approx. 2,600 - 3,500 mV

MONITOR ITEM

CONDITION

SPECIFICATION

EC-1020

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR MEXICO]

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:0000000009481705

ECM Terminal and Reference Value

INFOID:0000000009481706

PREPARATION

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

EVAP LEAK DIAG

• Ignition switch: ON

Indicates the condition of EVAP 
leak diagnosis.

EVAP DIAG READY

• Ignition switch: ON

Indicates the ready condition of 
EVAP leak diagnosis.

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

THRTL STK CNT B1

NOTE:
The item is indicated, but not used.

—

A/F-S ATMSPHRC 
CRCT B1

Engine: After warming up, idle the engine

Varies depending on vehicle 
environment.

A/F-S ATMSPHRC 
CRCT B2

Engine: After warming up, idle the engine

Varies depending on vehicle 
environment.

A/F-S ATMSPHRC 
CRCT UP B1

Engine: Running

Varies depending on the num-
ber of updates.

A/F-S ATMSPHRC 
CRCT UP B2

Engine: Running

Varies depending on the num-
ber of updates.

MONITOR ITEM

CONDITION

SPECIFICATION

AWBIA2014ZZ

ECM

EC-1021

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR MEXICO]

C

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EC

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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.

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.

BBIA0537E

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

BR

ECM ground

[Engine is running]
• Idle speed

Body ground

2

G

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

3

V

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

L/W

Throttle control motor (Close)

[Ignition switch: ON]
• Engine: Stopped
• Shift  lever:  D
• Accelerator pedal: Fully released

0 - 14V

5

L/B

Throttle control motor (Open)

[Ignition switch: ON]
• Engine: Stopped
• Shift  lever:  D
• Accelerator pedal: Fully depressed

0 - 14V

PBIA8148J

PBIB1104E

PBIB1105E

EC-1022

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR MEXICO]

ECM

6

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)

10

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: 2,500 rpm

7 - 12V

11

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: 2,500 rpm

7 - 12V

12

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

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 10V

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

Approximately 10V

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1790E

PBIB1790E

PBIB1041E

PBIB1042E

 

 

 

 

 

 

 

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