Nissan Frontier D22. Manual — part 446
DTC P0402 EGRC-BPT VALVE FUNCTION
EC-887
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
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
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]
C
D
E
F
G
H
I
J
K
L
M
A
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
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