Nissan Frontier D22. Manual — part 489
DTC P1402 EGR FUNCTION
EC-1059
[VG33E]
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EC
EGRC-solenoid Valve
The EGRC-solenoid valve responds to signals from the ECM. When
the ECM sends an ON (ground) signal, the coil in the solenoid valve
is energized. Vacuum signal (from the intake manifold collector)
passes through the solenoid valve. The signal then reaches the EGR
valve.
When the ECM sends an OFF signal, a plunger will then move to cut
the vacuum signal from the intake manifold collector to the EGR
valve.
On Board Diagnosis Logic
UBS00DOE
If EGR temperature sensor detects EGR flow under the condition
that does not call for EGR, a high-flow malfunction is diagnosed.
NOTE:
Diagnosis for this DTC will occur when engine coolant temperature
is approx. 50 to 60
°C (122 to 140°F). Therefore, it will be better to
turn ignition switch ON (Start engine) at the engine coolant tempera-
ture below 40
°C (104°F) when starting DTC confirmation procedure.
DTC Confirmation Procedure
UBS00DOF
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
●
Engine coolant temperature and EGR temperature must be
verified in “DATA MONITOR” mode with CONSULT-II before
starting DTC WORK SUPPORT test. If it is out of range
below, the test cannot be conducted.
COOLAN TEMP/S:
−10 to 40°C (14 to 104°F)*
EGR TEMP SEN: Less than 4.8V
If the values are out of the ranges indicated above, park the
vehicle in a cool place and allow the engine temperature to
stabilize. Do not attempt to reduce the engine coolant or
EGR temperature with a fan or means other than ambient
air. Doing so may produce an inaccurate diagnostic result.
*: Although CONSULT-II screen displays “
−10 to 40°C (14 to 104°F)”
as a range of engine coolant temperature, ignore it.
WITH CONSULT-II
1.
Turn ignition switch OFF and wait at least 5 seconds, then turn ignition switch ON.
SEF318UA
SEF073P
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible Cause
P1402
EGRC-solenoid valve cir-
cuit open
●
EGR flow is detected under conditions that
do not call for EGR.
●
EGRC-solenoid valve
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EGR valve leaking or stuck open
●
EGR temperature sensor
●
EGRC-BPT valve
SEF202Y
EC-1060
[VG33E]
DTC P1402 EGR FUNCTION
2.
Select “EGR SYSTEM P1402” of “EGR SYSTEM” in “DTC
WORK SUPPORT” mode with CONSULT-II.
3.
Touch “START”. Follow instruction of CONSULT-II.
4.
Start engine and let it idle until “TESTING” on CONSULT-II
screen is turned to “COMPLETED”. (It will take 60 seconds or
more.)
If “TESTING” is not displayed after 5 minutes, turn ignition
OFF and cool the engine coolant temperature to the range
of
−10 to 40°C (14 to 104°F). Retry from step 1.
5.
Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to
WITH GST
1.
Turn ignition switch ON and select MODE 1 with GST.
2.
Check that engine coolant temperature is within the range of
−10 to 40°C (14 to 104°F).
3.
Check that voltage between ECM terminal 63 (EGR temperature sensor signal) and ground is less than
4.8V.
4.
Start engine and let it idle for at least 60 seconds.
5.
Stop engine.
6.
Perform from step 1 to 4.
PEF803W
SEF203Y
SEF204Y
SEF236Y
DTC P1402 EGR FUNCTION
EC-1061
[VG33E]
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EC
7.
Select MODE 3 with GST.
8.
If 1st trip DTC is detected, go to
EC-1063, "Diagnostic Procedure"
.
EC-1062
[VG33E]
DTC P1402 EGR FUNCTION
Wiring Diagram
UBS00DOG
BBWA0504E
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