Nissan Titan A60. Manual - part 348

EC-58

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

ECU DIAGNOSIS INFORMATION

ECM

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000006158942

Remarks:
z

 Specification data are reference values.

z

 Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in spite of the

ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM according to the signals

input from the camshaft position sensor and other ignition timing related sensors.

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

• Run engine and compare CONSULT-III value with the tachometer 

indication.

Almost the same speed as the 
tachometer indication.

MAS A/F SE-B1

See 

EC-128

.

B/FUEL SCHDL

See 

EC-128

.

A/F ALPHA-B1
A/F ALPHA-B2

See 

EC-128

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°C (158°F)

A/F SEN1 (B1)
A/F SEN1 (B2)

• Engine: After warming up

Maintaining engine speed at 2,000 
rpm

Fluctuates around 2.2 V

HO2S2 (B1)
HO2S2 (B2)

• Revving engine from idle to 3,000 rpm quickly after the following 

conditions are met.

• After keeping engine speed between 3,500 and 4,000 rpm for 1 

minute and at idle for 1 minute under no load

0 - 0.3V 

←→ Approx. 0.6 - 1.0V

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

• Revving engine from idle to 3,000 rpm quickly after the following 

conditions are met.

- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute 

and at idle for 1 minute under no load

LEAN 

←→ RICH

VHCL SPEED SE

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

speedometer indication.

Almost the same speed as the 
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully de-
pressed

4.2 - 4.8V

ACCEL SEN 2*

1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully de-
pressed

4.2 - 4.8V

TP SEN 1-B1
TP SEN 2-B1

• Ignition switch: ON

(Engine stopped)

• Selector lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully de-
pressed

Less than 4.75V

EVAP SYS PRES

• Ignition switch: ON

Approx. 1.8 - 4.8V

START SIGNAL

• Ignition switch: ON 

→ START → ON

OFF 

→ ON → OFF

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

P/N POSI SW

• Ignition switch: ON

Shift lever: P or N

ON

Shift lever: Except above

OFF

ECM

EC-59

< ECU DIAGNOSIS INFORMATION >

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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·m/s

2,500 rpm

9.0 - 28.0 g·m/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

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

MONITOR ITEM

CONDITION

SPECIFICATION

EC-60

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

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

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-III value with the 

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 and blower fan switch: ON (Compressor oper-

ates.)

1.0 - 4.0V

VHCL SPEED SE

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

speedometer 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

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

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

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

ETHANOL M/R*

2

• Ignition switch: ON

0 - 85%

MONITOR ITEM

CONDITION

SPECIFICATION

ECM

EC-61

< ECU DIAGNOSIS INFORMATION >

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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. 

ECM Harness Connector Terminal Layout

INFOID:0000000006158943

ECM Terminal and Reference Value

INFOID:0000000006158944

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-III.

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.

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

PBIB3368E

BBIA0386E