Infiniti QX4 (R50). Manual — part 249
Diagnostic Procedure
NBEC0530
PROCEDURE A
NBEC0530S01
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SWIRL CONT SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” on CONSULT-II screen.
SEF003Z
4. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 3.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure
EC-463
3
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect swirl control valve control solenoid valve harness connector.
SEF002Z
3. Turn ignition switch “ON”.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester.
SEF619X
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M32, F23
I
15A fuse
I
Harness for open or short between swirl control valve control solenoid valve and fuse
©
Repair harness or connectors.
5
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
Repair open circuit, short to ground or short to power in harness connectors.
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-464
6
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
With CONSULT-II
1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select “SWIRL CONT SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.
SEF004Z
Without CONSULT-II
1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.
SEF005Z
OK or NG
OK
©
GO TO 7.
NG
©
Replace intake manifold collector assembly.
7
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-140.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-465
PROCEDURE B
NBEC0530S02
1
CHECK INTAKE SYSTEM
1. Start engine and let it idle.
2. Check intake air system for air leaks.
OK or NG
OK (With CONSULT-II)
©
GO TO 2.
OK (Without CONSULT-
II)
©
GO TO 3.
NG
©
Repair intake system.
2
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT
With CONSULT-II
1. Select “SWIRL CONT SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
2. Touch “ON” and “OFF” on CONSULT-II screen.
SEF003Z
3. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 3.
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-466
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