Nissan Frontier D22. Instruction — part 490
DTC P1402 EGR FUNCTION
EC-1063
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
EC-1065, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EGR valve.
8.
CHECK EGRC-BPT VALVE
EC-1065, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace EGRC-BPT valve.
9.
CHECK EGR TEMPERATURE SENSOR
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]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
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
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