Nissan Titan. Manual - part 190

ECM

EC-61

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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CLSD THL POS

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

ON

Accelerator pedal: Slightly de-
pressed

OFF

AIR COND SIG

• Engine: After warming up, 

idle the engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor: Operates.)

ON

PW/ST SIGNAL

• Engine: After warming up, 

idle the engine

Steering wheel: Not being turned
(Forward direction)

OFF

Steering wheel: Being turned

ON

LOAD SIGNAL

• Ignition switch: ON

Rear window defogger switch is 
ON and/or lighting switch is in 2nd.

ON

Rear window defogger switch is 
OFF and lighting switch is OFF.

OFF

IGNITION SW

• Ignition switch: ON 

→ OFF → ON

ON 

→ OFF → ON

HEATER FAN SW

• Engine: After warming up, 

idle the engine

Heater fan control switch: OFF

OFF

Heater fan control switch: ON

ON

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

INJ PULSE-B1
INJ PULSE-B2

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

2.0 - 2.8 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

10

° - 20° BTDC

2,000 rpm

25

° - 45° BTDC

CAL/LD VALUE

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

14% - 33%

2,500 rpm

12% - 25%

MASS AIRFLOW

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

3.0 - 9.0 g/s

2,500 rpm

9.0 - 28.0 g/s

PURG VOL C/V

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle
(Accelerator pedal: Not depressed 
even slightly, after engine starting.)

0%

2,000 rpm

—

INT/V TIM (B1)
INT/V TIM (B2)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

(

−5)° - (+5)°CA

2,000 rpm

Approx. 0

° - 20°CA

INT/V SOL (B1)
INT/V SOL (B2)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

2,000 rpm

Approx. 25% - 50%

AIR COND RLY

• Engine: After warming up, 

idle the engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor: Operates)

ON

FUEL PUMP RLY

• For 1 second after turning ignition switch ON
• Engine running or cranking

ON

• Except above conditions

OFF

MONITOR ITEM

CONDITION

SPECIFICATION

EC-62

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

FPCM*

2

• Engine: Cranking

HI

• Engine: Idle
• Engine coolant temperature: More than 10

°C (50°F)

LOW

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

ON

A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

4 - 100%

HO2S2 HTR (B1)
HO2S2 HTR (B2)

• 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

ON

• Engine speed: Above 3,600 rpm

OFF

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

I/P PULLY SPD

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

Almost the same speed as the 
tachometer indication

VEHICLE SPEED

• Turn drive wheels and compare CONSULT value with the speed-

ometer indication.

Almost the same speed as the 
speedometer indication

IDL A/V LEARN

• Engine: Running

Idle air volume learning has not 
been performed yet.

YET

Idle air volume learning has al-
ready been performed successful-
ly.

CMPLT

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)

• Engine: After warming up, idle the engine

4 - 100%

VHCL SPEED SE

• Turn drive wheels and compare CONSULT value with the speed-

ometer indication.

Almost the same speed as the 
speedometer indication

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: 
Released

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

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

MONITOR ITEM

CONDITION

SPECIFICATION

ECM

EC-63

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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*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: For Flexible Fuel Vehicle
*3: Before measuring the terminal voltage, confirm the battery is fully charged. 

CRUISE LAMP

• Ignition switch: ON

MAIN switch: Pressed at the 1st 
time 

→ at the 2nd time

ON 

→ OFF

SET LAMP

• MAIN switch: ON
• Vehicle speed: Between 40 

km/h (25 MPH) and 144 km/h 
(89 MPH)

ASCD: Operating

ON

ASCD: Not operating

OFF

ETHANOL M/R*

2

• Ignition switch: ON

0 - 85%

ALT DUTY

• Engine: Idle

0 - 80%

BAT CUR SEN

• Engine speed: Idle
• Battery: Fully charged*

3

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

Approx. 2,600 - 3,500mV

A/F ADJ-B1

• Engine: Running

(–0.330) - (+0.330)

A/F ADJ-B2

• Engine: Running

(–0.330) - (+0.330)

P/N POSI SW

• Ignition switch: ON

Shift lever: P or N

ON

Shift lever: Except above

OFF

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air tempera-
ture.

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor oper-

ates.)

1.0 - 4.0V

A/F SEN1 (B2)

• Engine: After warming up

Maintaining engine speed at 2,000 
rpm

Fluctuates around 2.2 V

VTC DTY EX B2

—

—

FPCM DR VOLT

• Not used.

—

THRTL STK CNT B1

NOTE:
The item is indicated, but not used.

—

HO2 S2 DIAG2 (B1)

NOTE:
The item is indicated, but not used.

—

HO2 S2 DIAG2 (B2)

NOTE:
The item is indicated, but not used.

—

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.

A/F SEN1 DIAG2 (B1)

NOTE:
The item is indicated, but not used.

—

A/F SEN1 DIAG2 (B2)

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

EC-64

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

ECM Harness Connector Terminal Layout

INFOID:0000000009886514

ECM Terminal and Reference Value

INFOID:0000000009886515

PREPARATION

ECM is located in the engine room passenger side behind battery.

ECM INSPECTION TABLE

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT.

CAUTION:

Do not 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.

PBIB3368E

BBIA0386E

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

B

ECM ground

[Engine is running]
• Idle speed

Body ground

2

LG/B

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

L

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
• Selector lever: D
• Accelerator pedal: Fully released

0 - 14V

PBIA8148J

PBIB1104E