Nissan Frontier D22. Manual - part 295

DTC P0400 EGR FUNCTION

EC-283

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3. 

CHECK VACUUM SOURCE TO EGR VALVE

 Without CONSULT-II

1.

Warm engine up to normal operating temperature.

2.

Disconnect vacuum hose to EGR valve.

3.

Check for vacuum existence at idle.
Vacuum should not exist at idle.

4.

Disconnect EGRC solenoid valve harness connector. (The 1st
trip DTC for EGRC solenoid valve will be displayed, but ignore
it.)

5.

Check for vacuum existence when revving engine from 2,000
rpm up to 4,000 rpm.
Vacuum should exist when revving engine.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 5.

4. 

CHECK EGR VALVE

Refer to 

EC-285, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Repair or replace EGR valve.

5. 

CHECK VACUUM HOSE

1.

Turn ignition switch OFF.

2.

Check vacuum hose for clogging, cracks or improper connec-
tion.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Repair or replace vacuum hose.

6. 

CHECK EGRC SOLENOID VALVE OPERATION

 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 9.

NG

>> GO TO 8.

SEF337V

SEF109L

SEF716Z

EC-284

[KA24DE]

DTC P0400 EGR FUNCTION

7. 

CHECK EGRC SOLENOID VALVE OPERATION

 Without CONSULT-II

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

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

CHECK EGRC SOLENOID VALVE CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Check the following.

–

Harness connectors E43, M65

–

Harness connectors M59, F27

–

10A fuse

–

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

–

Harness for open or short between ECM and EGRC solenoid valve

OK or NG

OK

>> GO TO 9.

NG

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

9. 

CHECK EGRC SOLENOID VALVE

Refer to 

EC-291, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10. 

NG

>> Replace EGRC solenoid valve.

10. 

CHECK EGRC-BPT VALVE

Refer to 

EC-285, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace EGRC-BPT valve.

11. 

CHECK EGR TEMPERATURE SENSOR

Refer to 

EC-285, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace EGR temperature sensor.

12. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

DTC P0400 EGR FUNCTION

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Component Inspection

UBS00D6O

EGR VALVE

●

Apply vacuum to EGR vacuum port with a hand vacuum pump.
EGR valve spring should lift.

●

Check for sticking.

EGRC SOLENOID VALVE

 With CONSULT-II

Check air passage continuity.
Perform “EGRC SOLENOID VALVE” in “ACTIVE TEST” mode.

 Without CONSULT-II

Check air passage continuity shown in the figure.

MEF137D

LEC036A

LEC037A

EC-286

[KA24DE]

DTC P0400 EGR FUNCTION

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 TEMPERATURE SENSOR

Check resistance change and resistance value.

<Reference data>

Removal and Installation

UBS00D6P

EGR VALVE

Refer to 

EM-13, "OUTER COMPONENT PARTS"

 .

SEF083P

SEF643Q

EGR temperature 

°C (°F)

Voltage [V]

Resistance M

Ω

0 (32)

4.56

 0.62 - 1.05

50 (122)

2.25

0.065 - 0.094

100 (212)

0.59

0.011 - 0.015

SEF068XB