Nissan Frontier D22. Manual - part 490

DTC P1402 EGR FUNCTION

EC-1063

[VG33E]

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Diagnostic Procedure

UBS00DOH

1. 

CHECK VACUUM HOSE

Check vacuum hose for clogging, cracks or improper connection.

OK or NG

OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 3.
NG

>> Repair or replace vacuum hose.

2. 

CHECK EGRC-SOLENOID VALVE CIRCUIT

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Turn EGRC-solenoid valve “ON” and “OFF” in “ACTIVE TEST”
mode with CONSULT-II and check operating sound.
Clicking noise should be heard.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

3. 

CHECK EGRC-SOLENOID VALVE CIRCUIT

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Disconnect EGRC-solenoid valve harness connector.

3.

Turn ignition switch ON.

4.

Check operating sound of the solenoid valve when disconnecting and reconnecting EGRC-solenoid valve
harness connector. (The DTC or the 1st trip DTC for the EGRC-solenoid valve will be displayed, however,
ignore it.)

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E43, M65

●

Harness connectors M59, F27

●

Fuse block (J/B) connector E49

●

10A fuse

●

Harness for open or short between fuse and EGRC-solenoid valve

●

Harness for open or short between ECM and EGRC-solenoid valve

>> Repair open circuit or short to ground or short to power in harness or connectors.

SEF109L

SEF716Z

EC-1064

[VG33E]

DTC P1402 EGR FUNCTION

5. 

CHECK EGRC-SOLENOID VALVE

 With CONSULT-II

1.

Perform “EGRC SOLENOID VALVE” in “ACTIVE TEST” mode.

2.

Check air passage continuity and operation delay time under the
following conditions.

OK or NG

OK

>> GO TO 7.

NG

>> Replace EGRC-solenoid valve.

6. 

CHECK EGRC-SOLENOID VALVE

 Without CONSULT-II

1.

Check air passage continuity and operation delay time under the
following conditions.

OK or NG

OK

>> GO TO 7.

NG

>> Replace EGRC-solenoid valve.

7. 

CHECK EGR VALVE

Refer to 

EC-1065, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EGR valve.

8. 

CHECK EGRC-BPT VALVE

Refer to 

EC-1065, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace EGRC-BPT valve.

9. 

CHECK EGR TEMPERATURE SENSOR

Refer to 

EC-895, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace EGR temperature sensor.

Conditions

Air passage continuity 

between A and B

Air passage continuity 

between A and C

ON

Yes

No

OFF

No

Yes

SEF129Y

Conditions

Air passage continuity 

between A and B

Air passage continuity 

between A and C

12V direct current supply 
between terminals 1 and 
2

Yes

No

No supply

No

Yes

AEC919

DTC P1402 EGR FUNCTION

EC-1065

[VG33E]

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10. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Component Inspection

UBS00DOI

EGR VALVE

1.

Apply vacuum to EGR vacuum port with a hand vacuum pump.

2.

Check for sticking.

3.

If NG, repair or replace EGR valve.

EGRC-BPT VALVE

1.

Plug one of two ports of EGRC-BPT valve.

2.

Vacuum from the other port and check for leakage while apply-
ing a pressure above 0.981 kPa (100 mmH

2

  O,  3.94  inH

2

 O)

from under EGRC-BPT valve.

3.

If a leakage is noted, replace the valve.

EGR valve spring should lift.

MEF137D

SEF083P

EC-1066

[VG33E]

DTC P1442 EVAP CONTROL SYSTEM

DTC P1442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

UBS00DOJ

NOTE:
If DTC P1442 is displayed with P1448, perform trouble diagnosis for DTC P1448 first. (See 

EC-1083

 .)

This diagnosis detects leaks in the EVAP purge line using of vapor pressure in the fuel tank.
The EVAP canister vent control valve is closed to shut the EVAP purge line. The vacuum cut valve bypass
valve will then be opened to clear the line between the fuel tank and the EVAP canister purge volume control
solenoid valve. The EVAP control system pressure sensor can now monitor the pressure inside the fuel tank.
If pressure increases, the ECM will check for leaks in the line between the vacuum cut valve and EVAP canis-
ter purge volume control solenoid valve.

PBIB1438E