Infiniti I35 (A33). Manual — part 42
Wiring Diagram — AT — TCCSIG
=NHAT0062
MAT481B
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Wiring Diagram — AT — TCCSIG
AT-165
Diagnostic Procedure
NHAT0063
1
CHECK SHIFT UP (D
3
TO D
4
)
During “Cruise test — Part 1” (AT-77), does A/T shift from D
3
to D
4
at the specified speed?
SAT988H
Yes or No
Yes
©
GO TO 11.
No
©
GO TO 2.
2
CHECK LINE PRESSURE
Perform line pressure test.
Refer to AT-68.
MTBL1183
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 6.
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Diagnostic Procedure
AT-166
3
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-314.
2. Check to ensure that:
I
Valve, sleeve and plug slide along valve bore under their own weight.
I
Valve, sleeve and plug are free from burrs, dents and scratches.
I
Control valve springs are free from damage, deformation and fatigue.
I
Hydraulic line is free from obstacles.
SAT367H
OK or NG
OK
©
GO TO 4.
NG
©
Repair control valve.
4
CHECK SHIFT UP (D
3
TO D
4
)
Does A/T shift from D
3
to D
4
at the specified speed?
OK or NG
OK
©
GO TO 5.
NG
©
Check control valve again. Repair or replace control valve assembly.
5
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-163.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 11.
Check for proper lock-up.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Diagnostic Procedure (Cont’d)
AT-167
6
CHECK SOLENOID VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-282.
I
Line pressure solenoid valve
2. Check resistance to the terminal and ground.
SAT829K
OK or NG
OK
©
GO TO 7.
NG
©
Replace solenoid valve assembly.
7
CHECK SOLENOID VALVE OPERATION
1. Remove control valve assembly. Refer to AT-314.
I
Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
SAT830K
OK or NG
OK
©
GO TO 8.
NG
©
Replace solenoid valve assembly.
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Diagnostic Procedure (Cont’d)
AT-168
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