Infiniti QX4 (R50). Manual — part 38
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0051S01
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”.
2)
Select “DATA MONITOR” mode for “ENGINE” with CON-
SULT-II and wait at least 1 second.
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 P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Description (Cont’d)
AT-149
Wiring Diagram — AT — TCV
NBAT0194
MAT735A
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Wiring Diagram — AT — TCV
AT-150
Diagnostic Procedure
NBAT0052
1
CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 7 and ground.
SAT156J
Is resistance approx. 10 - 20
Ω
?
Yes
©
GO TO 3.
No
©
GO TO 2.
2
CHECK VALVE OPERATION
1. Remove oil pan. Refer to AT-273.
2. Check the following items:
I
Torque converter clutch solenoid valve
Refer to “Component Inspection”, AT-152.
I
Harness of terminal cord assembly for short or open
OK or NG
OK
©
GO TO 3.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
3
CHECK RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 7 and TCM harness connector terminal 3. Refer to wiring diagram — AT — TCV.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-149.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 5.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
AT-151
5
CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
©
INSPECTION END
NG
©
Repair or replace damaged parts.
SAT160J
Component Inspection
NBAT0053
TORQUE CONVERTER CLUTCH SOLENOID VALVE
NBAT0053S01
I
For removal, refer to AT-273.
Resistance Check
NBAT0053S0101
I
Check resistance between terminal 7 and ground.
Solenoid valve
Terminal No.
Resistance (Approx.)
Torque converter clutch
solenoid valve
7
Ground
10 - 20
Ω
SAT161J
Operation Check
NBAT0053S0102
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal 7 and ground.
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure (Cont’d)
AT-152
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