Infiniti QX4 (R50). Manual — part 246
SEF354Z
Component Description
NBEC0697
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
CONSULT-II Reference Value in Data Monitor
Mode
NBEC0698
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
INT/V SOL (B1)
INT/V SOL (B2)
I
Engine: After warming up
I
Shift lever “N”
I
Quickly depressed accelerator
pedal
I
No-load
Idle
0%
2,000 rpm
Approximately 40%
ECM Terminals and Reference Value
NBEC0699
Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than the ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
13
OR/B
Intake valve timing
control solenoid valves
(RH)
[Engine is running]
I
Warm-up condition
I
Idle speed
Battery voltage
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
7 - 8V
SEF350Z
15
P/L
Intake valve timing
control solenoid valves
(LH)
[Engine is running]
I
Warm-up condition
I
Idle speed
Battery voltage
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
7 - 8V
SEF350Z
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1111 (RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
Component Description
EC-451
On Board Diagnosis Logic
NBEC0700
Malfunction is detected when an improper voltage is sent to the
ECM through intake valve timing control solenoid valve.
Possible Cause
NBEC0701
I
Harness or connectors
(Intake valve timing control solenoid valve circuit is open or
shorted.)
I
Intake valve timing control solenoid valve.
SEF353Z
DTC Confirmation Procedure
NBEC0702
NOTE:
If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
WITH CONSULT-II
NBEC0702S01
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Maintain the following conditions for at least 5 seconds.
Engine speed
More than Idle speed
Selector lever
“P” or “N” position
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-455.
WITH GST
NBEC0702S02
Follow the procedure “With CONSULT-II” above.
DTC P1111 (RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
On Board Diagnosis Logic
EC-452
Wiring Diagram
NBEC0703
RIGHT BANK
NBEC0703S01
MEC989C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1111 (RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
Wiring Diagram
EC-453
LEFT BANK
NBEC0703S02
MEC988C
DTC P1111 (RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
Wiring Diagram (Cont’d)
EC-454
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