Content .. 487 488 489 490 ..

Nissan Frontier. Manual - part 489

DIAGNOSIS SYSTEM (ECM)

EC-527

< SYSTEM DESCRIPTION >

[VQ40DE FOR USA AND CANADA]

*: DTC P1456 does not apply to D40 models but appears in DTC Work Support Mode screens.

SRT & P-DTC MODE

SRT STATUS Mode

• For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT

codes are not set, “INCMP” is displayed.

• “SRT STATUS” provides the presence or absence of permanent DTCs stored in ECM memory.

PERMANENT DTC STATUS Mode

How to display permanent DTC status

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.

NOTE:

Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pat-

tern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION:

Since the “PERMANENT DTC STATUS” screen displays the previous trip information, repeat the

following twice to update the information: “Ignition switch OFF”, “Wait for more than 10 seconds”

and “Ignition switch ON”.

NOTE:

This mode is not used in regions that permanent DTCs are not regulated by law.

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

PERMANENT DTC WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to complete the driving pattern that is required for erasing

permanent DTC.

NOTE:

This mode is not used in regions that permanent DTCs are not regulated by law.

HO2S2

HO2S2(B1) P1146

P0138

EC-680

HO2S2(B1) P1147

P0137

EC-675

HO2S2(B1) P0139

P0139

EC-688

HO2S2(B2) P1166

P0158

EC-680

HO2S2(B2) P1167

P0157

EC-675

HO2S2(B2) P0159

P0159

EC-688

Test mode

Test item

Corresponding DTC No.

Reference page

JSBIA0062GB

EC-528

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

ECU DIAGNOSIS INFORMATION

ECM

CONSULT Reference Value in Data Monitor Mode

INFOID:0000000009481216

NOTE:

• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-

ble to this vehicle, refer to CONSULT display items.

• Numerical values in the following table are reference values.

• These values are input/output values that ECM receives/transmits and may differ from actual operations.

Example:

The ignition timing shown by the timing light may differ from the ignition timing displayed on the data monitor.

This occurs because the timing light shows a value calculated by ECM according to signals received from

the cam shaft position sensor and other sensors related to ignition timing.

For outlines of following items, refer to

EC-518, "CONSULT Function"

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

• Run engine and compare CONSULT value with the tachometer indication.

Almost the same speed as the
tachometer indication.

MAS A/F SE-B1

See

EC-607

B/FUEL SCHDL

See

EC-607

A/F ALPHA-B1
A/F ALPHA-B2

See

EC-607

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

- 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.

0 - 0.3V

←→ Approx. 0.6 - 1.0

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 value with the speedometer in-

dication.

Almost the same speed as the
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14 V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.65 - 0.87 V

Accelerator pedal: Fully depressed

More than 4.3 V

ACCEL SEN 2*

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.56 - 0.96V

Accelerator pedal: Fully depressed

More than 4.0 V

TP SEN 1-B1
TP SEN 2-B1*

• Ignition switch: ON

(Engine stopped)

• Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

FUEL T/TMP SE

• Ignition switch: ON

Indicates fuel tank temperature

EVAP SYS PRES

• Ignition switch: ON

Approx. 1.8 - 4.8 V

FUEL LEVEL SE

• Ignition switch: ON

Depending on fuel level of fuel
tank

START SIGNAL

• Ignition switch: ON

→ START → ON

OFF

→ ON → OFF

CLSD THL POS

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

Accelerator pedal: Slightly depressed

OFF

ECM

EC-529

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

AIR COND SIG

• Engine: After warming up, idle the

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates.)

P/N POSI SW

• Ignition switch: ON

Shift lever: P or N (A/T), Neutral (M/T)

Shift lever: Except above

OFF

PW/ST SIGNAL

• Engine: After warming up, idle the

engine

Steering wheel: Not being turned

OFF

Steering wheel: Being turned.

LOAD SIGNAL

• Ignition switch: ON

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

Rear window defogger switch is OFF
and lighting switch is OFF

OFF

IGNITION SW

• Ignition switch: ON

→ OFF → ON

HEATER FAN SW

• Engine: After warming up, idle the

engine

Heater fan: Operating.

Heater fan: Not operating

OFF

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

INJ PULSE-B1
INJ PULSE-B2

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

° - 18° BTDC

2,000 rpm

° - 45° BTDC

CAL/LD VALUE

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

5% - 35%

2,500 rpm

5% - 35%

MASS AIRFLOW

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

2.0 - 6.0 g/s

2,500 rpm

7.0 - 20.0 g/s

PURG VOL C/V

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)

2,000 rpm

—

INT/V TIM (B1)
INT/V TIM (B2)

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

−5° - 5°CA

2,000 rpm

Approx. 0

° - 30°CA

INT/V SOL (B1)
INT/V SOL (B2)

• Engine: After warming up
• Shift lever: P or N (A/T), Neutral

(M/T)

• Air conditioner switch: OFF
• No load

Idle

0% - 2%

2,000 rpm

Approx. 0% - 50%

SWRL CONT S/V

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

tween –12

°C (10°F) and 20°C

(68

°F)

Accelerator pedal: Fully released

Accelerator pedal: Fully depressed

OFF

MONITOR ITEM

CONDITION

SPECIFICATION

EC-530

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

VIAS S/V-1

• Engine: After warming up

2,200 - 3,300 rpm

Except above conditions

OFF

AIR COND RLY

• Engine: After warming up, idle the

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

FUEL PUMP RLY

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

• Except above conditions

OFF

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

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

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 value with speedometer in-

dication.

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 already
been performed successfully.

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)
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

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

MONITOR ITEM

CONDITION

SPECIFICATION

Content .. 487 488 489 490 ..