Content .. 488 489 490 491 ..

Nissan Frontier. Manual - part 490

ECM

EC-531

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

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

VHCL SPD CUT

• Ignition switch: ON

NON

LO SPEED CUT

• Ignition switch: ON

NON

AT OD MONITOR

• Ignition switch: ON

OFF

AT OD CANCEL

• Ignition switch: ON

OFF

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

A/F ADJ-B1

• Engine: running

−0.330 - 0.330

A/F ADJ-B2

• Engine: running

−0.330 - 0.330

TUMBLE POS SEN

• Ignition switch: ON
• Engine coolant temperature: Be-

tween –12

°C (10°F) and 20°C

(68

°F)

Accelerator pedal: Fully released

Less than 1.4 V

Accelerator pedal: Fully depressed

More than 2.8 V

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air temperature

ALT DUTY SIG

• Power generation voltage variable control: Operating

• 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

VTC DTY EX B2*

—

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.

MONITOR ITEM

CONDITION

SPECIFICATION

EC-532

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

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"

*3: The item is indicated, but not used.

ECM Harness Connector Terminal Layout

INFOID:0000000009481217

ECM Terminal and Reference Value

INFOID:0000000009481218

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.

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.

A/F SEN1
DIAG1(B1)

DTC P015A and P015B self-diagnosis is incomplete.

INCMP

DTC P015A and P015B self-diagnosis is complete.

CMPLT

A/F SEN1
DIAG1(B2)

DTC P015C and P015D self-diagnosis is incomplete.

INCMP

DTC P015C and P015D self-diagnosis is complete.

CMPLT

A/F SEN1
DIAG2(B1)

DTC P014C and P014D self-diagnosis is incomplete.

INCMP

DTC P014C and P014D self-diagnosis is complete.

CMPLT

A/F SEN1
DIAG2(B2)

DTC P014E and P014F self-diagnosis is incomplete.

INCMP

DTC P014E and P014F self-diagnosis is complete.

CMPLT

A/F SEN1
DIAG3(B1)

The vehicle condition is not within the diagnosis range of DTC P014C, P014D,
P015A or P015B.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014C, P014D,
P015A or P015B.

PRSNT

A/F SEN1
DIAG3(B2)

The vehicle condition is not within the diagnosis range of DTC P014E, P014F,
P015C or P015D.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014E, P014F,
P015C or P015D.

PRSNT

MONITOR ITEM

CONDITION

SPECIFICATION

JSBIA0505ZZ

BBIA0537E

ECM

EC-533

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

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.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

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

A/F sensor 1 heater (Bank 2)

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

(More than 140 seconds after starting en-
gine)

Approximately 2.9 - 8.8V

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

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

Ignition signal No. 3
Ignition signal No. 2
Ignition signal No. 1

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

NOTE:
The pulse cycle changes depending on rpm
at idle

0 - 0.2V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

0.1 - 0.4V

PBIB1104E

PBIA8148J

PBIB1105E

PBIA8148J

SEC986C

SEC987C

EC-534

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

ECM ground

[Engine is running]
• Idle speed

Body ground

13
14
15

Ignition signal No. 6
Ignition signal No. 5
Ignition signal No. 4

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

NOTE:
The pulse cycle changes depending on rpm
at idle

0 - 0.2V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

0.1 - 0.4V

ECM ground

[Engine is running]
• Idle speed

Body ground

Sensor ground
(Throttle position sensor)

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

Approximately 0V

Intake manifold runner con-
trol valve position sensor

[Ignition switch: ON]
• Engine coolant temperature: Between –

°C (10°F) and 20°C (68°F)

• Accelerator pedal: Fully released

Less than 1.4 V

[Ignition switch: ON]
• Engine coolant temperature: Between –

°C (10°F) and 20°C (68°F)

• Accelerator pedal: Slightly depressed

More than 3.0 V

Throttle position sensor 1

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T), 1st (M/T)
• Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T), 1st (M/T)
• Accelerator pedal: Fully depressed

Less than 4.75V

Throttle position sensor 2

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T), 1st (M/T)
• Accelerator pedal: Fully released

Less than 4.75V

[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D (A/T), 1st (M/T)
• Accelerator pedal: Fully depressed

More than 0.36V

Sensor power supply (Throt-
tle position sensor)

[Ignition switch: ON]

Approximately 5V

R/B

Power supply for ECM (Back-
up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

Content .. 488 489 490 491 ..