Nissan Frontier D22. Manual - part 446

DTC P0402 EGRC-BPT VALVE FUNCTION

EC-887

[VG33E]

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EC

Diagnostic Procedure

UBS00DKA

1. 

CHECK HOSE

Check vacuum hose for clogging and improper connection.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace vacuum hose.

2. 

CHECK EXHAUST SYSTEM

Check exhaust system for collapse.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace exhaust system.

3. 

CHECK ORIFICE

Check if orifice is installed in vacuum hose between EGRC-BPT valve and EGRC-solenoid valve.

OK or NG

OK

>> GO TO 4.

NG

>> Replace vacuum hose.

4. 

CHECK EGRC-BPT VALVE

Refer to 

EC-889, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace EGRC-BPT valve.

EC-888

[VG33E]

DTC P0402 EGRC-BPT VALVE FUNCTION

5. 

CHECK CAMSHAFT POSITION SENSOR

1.

Install any parts removed.

2.

Start engine.

3.

Check voltage between ECM terminals 44, 48 and ground, ECM terminal 49 and ground with DC range.
<Terminal 44 or 48 and engine ground>

<Terminal 49 and engine ground>

OK or NG

OK

>> GO TO 6.

NG

>> Replace camshaft position sensor.

6. 

CHECK MASS AIR FLOW SENSOR

Refer to 

EC-726, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace mass air flow sensor.

Condition

Idle

2,000 rpm

Voltage

0.3 - 0.5V

0.3 - 0.5V

Pulse sig-

nal

Condition

Idle

2,000 rpm

Voltage

Approximately 2.5V

Approximately 2.5V

Pulse sig-

nal

PBIB1424E

SEF997U

SEF998U

SEF999U

SEF001V

DTC P0402 EGRC-BPT VALVE FUNCTION

EC-889

[VG33E]

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EC

7. 

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.

Without CONSULT-II

1.

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

OK or NG

OK

>> GO TO 8.

NG

>> Replace EGRC-solenoid valve.

8. 

CHECK EGR VALVE

Refer to 

EC-883, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace EGR valve.

9. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Component Inspection

UBS00DKB

EGRC-BPT VALVE

1.

Plug one of two ports of EGRC-BPT valve.

2.

Vacuum from the other port and check leakage without applying
any pressure from under EGR-BPT valve.

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

Leakage should exist.

SEF172P

EC-890

[VG33E]

DTC P0405, P0406 EGRT SENSOR

DTC P0405, P0406 EGRT SENSOR

PFP:14710

Component Description

UBS00DKC

The EGR temperature sensor detects temperature changes in the
EGR passageway. When the EGR valve opens, hot exhaust gases
flow, and the temperature in the passageway changes. The EGR
temperature sensor is a thermistor that modifies a voltage signal
sent from the ECM. This modified signal then returns to the ECM as
an input signal. As the temperature increases, EGR temperature
sensor resistance decreases. This sensor is not used to control the
engine system.
It is used only for the on board diagnosis.

<Reference data>

*: These data are reference values and are measured between ECM terminal 63
(EGR temperature sensor) and ground.
When EGR system is operating.
Voltage: 0 - 1.5V

On Board Diagnosis Logic

UBS00DKD

DTC Confirmation Procedure

UBS00DKE

Perform PROCEDURE FOR DTC P0405 first. If 1st trip DTC cannot be confirmed, perform PROCE-
DURE FOR DTC P0406.

SEF599K

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible Cause

P0405

EGR temperature circuit 
low input

An excessively low voltage from the 
EGR temperature sensor is sent to 
ECM.

●

Harness or connectors
(The EGR temperature sensor circuit is shorted.)

●

EGR temperature sensor

●

Malfunction of EGR function, EGRC-BPT valve 
or EGRC-solenoid valve

P0406

EGR temperature circuit 
high input

An excessively high voltage from the 
EGR temperature sensor is sent to 
ECM.

●

Harness or connectors
(The EGR temperature sensor circuit is open.)

●

EGR temperature sensor

●

Malfunction of EGR function, EGRC-BPT valve 
or EGRC-solenoid valve