Nissan Frontier. Instruction — part 659

P0420, P0430 THREE WAY CATALYST FUNCTION

EC-1207

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

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• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.

NOTE:

When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-

functioning.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 7.

7.

CHECK FUNCTION OF IGNITION COIL-II

1. Turn ignition switch OFF.

2. Disconnect spark plug and connect a known-good spark plug.

3. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark

plug and the grounded metal portion.

OK or NG

OK

>> GO TO 8.

NG

>> Check that ignition coil, power transistor and their circuits. Refer to

EC-1354

.

8.

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.
OK or NG

OK

>> Replace spark plug(s) with standard type one(s). For

spark plug type, refer to

EM-132, "Removal and Installa-

tion"

.

NG

>> 1. Repair or clean spark plug.

2. GO TO 9.

9.

CHECK FUNCTION OF IGNITION COIL-III

1. Reconnect the initial spark plugs.

2. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug

and the grounded portion.

OK or NG

OK

>> INSPECTION END

NG

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to

EM-132, "Removal

and Installation"

.

10.

CHECK FUEL INJECTOR

1. Turn ignition switch OFF.

2. Remove fuel injector assembly.

Refer to

EM-162, "Removal and Installation"

.

Keep fuel hose and all fuel injectors connected to fuel tube.

3. Reconnect all fuel injector harness connectors.

4. Disconnect all ignition coil harness connectors.

5. Turn ignition switch ON.

Check fuel does not drip from fuel injector.

OK or NG

OK (Does not drip.)>>GO TO 11.

NG (Drips.)>>Replace the fuel injector(s) from which fuel is dripping. Refer to

EM-162, "Exploded View"

.

11.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

Spark should be generated.

SEF156I

Spark should be generated.

EC-1208

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

P0420, P0430 THREE WAY CATALYST FUNCTION

Trouble is fixed.>>INSPECTION END

Trouble is not fixed.>>Replace three way catalyst (manifold). Refer to

EM-147, "Removal and Installation

(Three Way Catalyst)"

.

P0442 EVAP CONTROL SYSTEM

EC-1209

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

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P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000009481854

This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.

If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister

purge volume control solenoid valve, under the following Vacuum test conditions.

The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-

ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold

vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.

CAUTION:

• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the

MIL may illuminate.

• If the fuel filler cap is not tightened properly, the MIL may illuminate.

• Use only a genuine NISSAN rubber tube as a replacement.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0442
0442

EVAP control system
small leak detected
(negative pressure)

EVAP control system has a leak, EVAP
control system does not operate prop-
erly.

• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP

canister purge volume control solenoid valve.

• Foreign matter caught in EVAP canister vent con-

trol valve.

• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid

valve and the circuit

• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is

missing or damaged

• Drain filter
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Fuel level sensor and the circuit
• Refueling EVAP vapor cut valve
• ORVR system leaks

PBIB3640E

EC-1210

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

P0442 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000009481855

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next step.

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.

TESTING CONDITION:

• Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed

on flat level surface.

• Always perform test at a temperature of 0 to 30

°C (32 to 86°F).

WITH CONSULT

1. Turn ignition switch ON.

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

3. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.

4. Check that the following conditions are met.

COOLAN TEMP/S: 0 - 70

°C (32 - 158°F)

INT/A TEMP SE: 0 - 30

°C (32 - 86°F)

5. Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode

with CONSULT.

Follow the instructions displayed.

NOTE:

If the engine speed cannot be maintained within the range displayed on the CONSULT screen, go to

EC-

1068, "Basic Inspection"

.

6. Check that “OK” is displayed.

If “NG” is displayed, refer to

EC-1210, "Diagnosis Procedure"

.

NOTE:

Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve

properly.

WITH GST

NOTE:

Be sure to read the explanation of Driving Pattern ON

EC-1079, "SRT Set Driving Pattern"

before driving vehi-

cle.

1. Start engine.

2. Drive vehicle according to Driving Pattern,

EC-1002, "DIAGNOSIS DESCRIPTION : Driving Pattern"

.

3. Stop vehicle.

4. Turn ignition switch OFF, wait at least 10 seconds.

5. Turn ignition switch ON.

6. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

7. Select Service $07 with GST.

-

If P0442 is displayed on the screen, go to

EC-1210, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009481856

1.

CHECK FUEL FILLER CAP DESIGN

1. Turn ignition switch OFF.

2. Check for genuine NISSAN fuel filler cap design.
OK or NG

OK

>> GO TO 2.

NG

>> Replace with genuine NISSAN fuel filler cap.

SEF915U