Infiniti QX4 (R50). Manual — part 41
SAT159J
Component Inspection
NBAT0056
SOLENOID VALVES
NBAT0056S01
I
For removal, refer to AT-273.
Resistance Check
NBAT0056S0101
I
Check resistance between terminals (6 or 7) and ground.
Solenoid valve
Terminal No.
Resistance (Approx.)
Line pressure solenoid valve
6
Ground
2.5 - 5
Ω
Torque converter clutch
solenoid valve
7
10 - 20
Ω
SAT158J
Operation Check
NBAT0056S0102
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminals (6 or 7) and ground.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0744 IMPROPER LOCK-UP OPERATION
Component Inspection
AT-161
SAT341H
Description
NBAT0057
The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.
The line pressure duty cycle value is not consistent when the
closed throttle position switch is “ON”. To confirm the line
pressure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is
“OFF”.
CONSULT-II REFERENCE VALUE IN DATA MONITOR
MODE
NBAT0057S02
Remarks: Specification data are reference values.
Monitor item
Condition
Specification
Line pressure solenoid
valve duty
Small throttle opening (Low line pressure)
"
Large throttle opening (High line pressure)
Approximately 24%
"
Approximately 95%
NOTE:
The line pressure duty cycle value is not consistent when the closed throttle position switch is “ON”. To confirm the line pressure duty
cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is “OFF”.
TCM TERMINALS AND REFERENCE VALUE
NBAT0057S03
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
1
GY
Line pressure
solenoid valve
When releasing accelerator pedal after warm-
ing up engine.
1.5 - 3.0V
When depressing accelerator pedal fully after
warming up engine.
0V
2
BR/Y
Line pressure
solenoid valve
(with dropping
resistor)
When releasing accelerator pedal after warm-
ing up engine.
5 - 14V
When depressing accelerator pedal fully after
warming up engine.
0V
ON BOARD DIAGNOSIS LOGIC
NBAT0057S04
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: L/PRESS SOL/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Line pressure solenoid valve
: P0745
DTC P0745 LINE PRESSURE SOLENOID VALVE
Description
AT-162
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0057S01
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
for “ENGINE” with CONSULT-II.
2)
Depress accelerator pedal completely and wait at least 1 sec-
ond.
With GST
Follow the procedure “With CONSULT-II”.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0745 LINE PRESSURE SOLENOID VALVE
Description (Cont’d)
AT-163
Wiring Diagram — AT — LPSV
NBAT0196
MAT914A
DTC P0745 LINE PRESSURE SOLENOID VALVE
Wiring Diagram — AT — LPSV
AT-164
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