Nissan Frontier D22. Instruction — part 444
DTC P0400 EGR FUNCTION
EC-879
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
UBS00DK2
BBWA0504E
EC-880
[VG33E]
DTC P0400 EGR FUNCTION
Diagnostic Procedure
UBS00DK3
1.
CHECK EXHAUST GAS LEAK
1.
Start engine and run it at idle.
2.
Listen for an exhaust gas leak before three way catalyst (manifold).
OK or NG
OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 3.
NG
>> Repair or replace.
2.
CHECK VACUUM SOURCE TO EGR VALVE
With CONSULT-II
1.
Warm engine up to normal operating temperature.
2.
Disconnect vacuum hose to EGR valve.
3.
Check for vacuum existence at idle.
4.
Select “EGRC SOLENOID VALVE” in “ACTIVE TEST” mode
with CONSULT-II and turn the solenoid valve ON.
5.
Check for vacuum existence when revving engine from idle up
to 3,000rpm.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 5.
SEC502D
Vacuum should not exist at idle.
AEC648A
Vacuum should exist when revving engine.
SEF129Y
DTC P0400 EGR FUNCTION
EC-881
[VG33E]
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.
4.
Check for vacuum existence when revving engine from idle up
to 3,000 rpm quickly.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 5.
4.
CHECK EGR VALVE
Refer to
EC-883, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> 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.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace EGRC-solenoid valve or repair circuit.
Vacuum should not exist at idle.
Vacuum should exist when revving engine.
AEC648A
SEF109L
Clicking noise should be heard.
SEF129Y
EC-882
[VG33E]
DTC P0400 EGR FUNCTION
7.
CHECK EGRC-SOLENOID VALVE OPERATION
Without CONSULT-II
1.
Disconnect ECM harness connector.
2.
Turn ignition switch ON.
3.
Connect a suitable jumper wire between ECM terminal 103 and engine ground.
4.
Check operating sound of EGRC-solenoid valve when disconnecting and connecting the jumper wire.
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace EGRC-solenoid valve or repair circuit.
8.
CHECK EGRC-SOLENOID VALVE
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 10.
NG
>> Repair EGRC-solenoid valve.
9.
CHECK EGRC-SOLENOID VALVE
1.
Check air passage continuity and operation delay time under the
following conditions.
OK or NG
OK
>> GO TO 10.
NG
>> Repair EGRC-solenoid valve.
10.
CHECK EGRC-BPT VALVE
EC-883, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace EGRC-BPT valve.
11.
CHECK EGR TEMPERATURE SENSOR
EC-895, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EGR temperature sensor.
Clicking noise should be heard.
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
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