Nissan Frontier D22. Manual - part 236

BASIC SERVICE PROCEDURE

EC-47

[KA24DE]

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EC

 Without CONSULT-II

1.

Remove fuse for fuel pump.

2.

Start engine.

3.

After engine stalls, crank it two or three times to release all fuel
pressure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:

●

When reconnecting fuel line, always use new clamps.

●

Make sure that clamp screw does not contact adjacent parts.

●

Use a torque driver to tighten clamps.

●

Use Pressure Gauge to check fuel pressure.

●

Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate
false readings.

1.

Release fuel pressure to zero.

2.

Disconnect fuel hose between fuel filter and fuel tube (engine side).

3.

Install pressure gauge between fuel filter and fuel tube.

4.

Start engine and check for fuel leakage.

5.

Read the indication of fuel pressure gauge.

If results are unsatisfactory, perform 

EC-48, "Fuel Pressure

Regulator Check"

 .

SEF164X

AEC064B

At idle speed:

With vacuum hose con-
nected

Approximately 235 kPa 

(2.4 kg/cm

2

 , 34 psi)

With vacuum hose dis-
connected

Approximately 294 kPa 

(3.0 kg/cm

2

 , 43 psi)

SEF318V

EC-48

[KA24DE]

BASIC SERVICE PROCEDURE

Fuel Pressure Regulator Check

UBS00D16

1.

Stop engine and disconnect fuel pressure regulator vacuum
hose from intake manifold.

2.

Plug intake manifold with a rubber cap.

3.

Connect variable vacuum source to fuel pressure regulator.

4.

Start engine and read indication of fuel pressure gauge as vac-
uum is changed.

Fuel pressure should decrease as vacuum increases. If results
are unsatisfactory, replace fuel pressure regulator.

SEF718B

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-49

[KA24DE]

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EC

ON BOARD DIAGNOSTIC (OBD) SYSTEM

PFP:00028

Introduction

UBS00D17

The ECM has an on board diagnostic system which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:

The above information can be checked using procedures listed in the table below.

X: Applicable

—: Not applicable

*: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.

The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to 

EC-73

 .)

Two Trip Detection Logic

UBS00D18

When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd
trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.

X: Applicable

—: Not applicable

*: Except “ECM”

Diagnostic Trouble Code (DTC)

Mode 3 of SAE J1979

Freeze Frame data

Mode 2 of SAE J1979

System Readiness Test (SRT) code

Mode 1 of SAE J1979

1st Trip Diagnostic Trouble Code (1st Trip DTC)

Mode 7 of SAE J1979

1st Trip Freeze Frame data

Test values and Test limits

Mode 6 of SAE J1979

Calibration ID

Mode 9 of SAE J1979

DTC

1st trip DTC

Freeze Frame 

data

1st trip Freeze 

Frame data

SRT code

Test value

CONSULT-II

X

X

X

X

X

—

GST

X

X*

X

—

X

X

Items

MIL

DTC

1st trip DTC

1st trip

2nd trip

1st trip 

display-

ing

2nd trip 

display-

ing

1st trip 

display-

ing

2nd trip 

display-

ing

Blinking

Lighting 

up

Blinking

Lighting 

up

Misfire (Possible three way catalyst 
damage) — DTC: P0300 - P0304 is 
being detected

X

—

—

—

—

—

X

—

Misfire (Possible three way catalyst 
damage) — DTC: P0300 - P0304 is 
being detected

—

—

X

—

—

X

—

—

One trip detection diagnoses
(Refer to 

EC-18

 .)

—

X

—

—

X

—

—

 —

Fail-safe items (Refer to 

EC-73

 .)

—

X

—

—

X*

—

—

 —

Except above

—

—

—

X

—

X

X

—

EC-50

[KA24DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Emission-related Diagnostic Information

UBS00D19

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

X: Applicable

—: Not applicable

Items

(CONSULT-II screen terms)

DTC*1*2

SRT code

Test value/

Test limit

(GST only)

1st trip DTC

Reference page

CONSULT-II

GST

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

—

—

—

—

HO2S1 HTR (B1)

P0031

X

X

X*4

EC-126

HO2S1 HTR (B1)

P0032

X

X

X*4

EC-126

HO2S2 HTR (B1)

P0037

X

X

X*4

EC-131

HO2S2 HTR (B1)

P0038

X

X

X*4

EC-131

MAF SEN/CIRCUIT

P0101

—

—

X

EC-136

MAF SEN/CIRCUIT

P0102

—

—

—

EC-143

MAF SEN/CIRCUIT

P0103

—

—

—

EC-143

IAT SEN/CIRCUIT

P0112

—

—

—

EC-149

IAT SEN/CIRCUIT

P0113

—

—

—

EC-149

ECT SEN/CIRCUIT

P0117

—

—

—

EC-154

ECT SEN/CIRCUIT

P0118

—

—

—

EC-154

TP SEN/CIRCUIT

P0121

—

—

X

EC-159

TP SEN/CIRCUIT

P0122

—

—

—

EC-168

TP SEN/CIRCUIT

P0123

—

—

—

EC-168

ECT SENSOR

P0125

—

—

X

EC-174

IAT SENSOR

P0127

—

—

X

EC-179

THERMSTAT FNCTN

P0128

—

—

X

EC-184

HO2S1 (B1)

P0132

— 

X

X

EC-186

HO2S1 (B1)

P0133

X

X

X*4

EC-192

HO2S1 (B1)

P0134

— 

X

X

EC-202

HO2S2 (B1)

P0138

— 

X

X

EC-209

HO2S2 (B1)

P0139

X

X

X*4

EC-216

FUEL SYS-LEAN-B1

P0171

—

—

X

EC-225

FUEL SYS-RICH-B1

P0172

—

—

X

EC-232

FTT SENSOR

P0181

—

—

X

EC-239

FTT SEN/CIRCUIT

P0182

 —

—

X

EC-244

FTT SEN/CIRCUIT

P0183

—

—

X

EC-244

ENG OVER TEMP

P0217

—

—

— 

EC-248

MULTI CYL MISFIRE

P0300

—

—

X

EC-252

CYL1 MISFIRE

P0301

—

—

X

EC-252

CYL2 MISFIRE

P0302

—

—

X

EC-252

CYL3 MISFIRE

P0303

—

—

X

EC-252

CYL4 MISFIRE

P0304

—

—

X

EC-252

KNOCK SEN/CIRC-B1

P0327

—

—

—

EC-259

KNOCK SEN/CIRC-B1

P0328

—

—

—

EC-259

CKP SEN/CIRCUIT

P0335

—

—

X

EC-263

CMP SEN/CIRCUIT

P0340

—

—

X

EC-269

EGR SYSTEM

P0400

X

X

X*4

EC-276