Nissan Frontier D22. Manual — part 295
DTC P0400 EGR FUNCTION
EC-283
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
EC-291, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace EGRC solenoid valve.
10.
CHECK EGRC-BPT VALVE
EC-285, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace EGRC-BPT valve.
11.
CHECK EGR TEMPERATURE SENSOR
EC-285, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EGR temperature sensor.
12.
CHECK INTERMITTENT INCIDENT
EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
DTC P0400 EGR FUNCTION
EC-285
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
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
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