Infiniti I30 (A33). Manual — part 37
Vehicle condition
Gear on actual transmission shift pattern when
screen is changed to 1
,
2
,
3
,
4
No malfunction exists
1
,
2
,
3
,
4
Malfunction for P0734 exists.
1
,
2
,
2
,
1
8)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”, AT-147.
Refer to shift schedule, AT-382.
WITH GST
NHAT0224S02
Follow the procedure “With CONSULT-II”.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0734 A/T 4TH GEAR FUNCTION
Diagnostic Trouble Code (DTC) Confirmation Procedure (Cont’d)
AT-145
Wiring Diagram — AT — 4TH
NHAT0056
MAT811A
SAT300K
DTC P0734 A/T 4TH GEAR FUNCTION
Wiring Diagram — AT — 4TH
AT-146
Diagnostic Procedure
NHAT0057
1
CHECK SHIFT UP (D
3
TO D
4
)
During “Cruise test − Part 1” (AT-74), 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-65.
MTBL0308
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 7.
3
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-280.
I
Shift solenoid valve A
I
Shift solenoid valve B
2. Check resistance between two terminals.
SAT043KA
OK or NG
OK
©
GO TO 5.
NG
©
Replace solenoid valve assembly.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0734 A/T 4TH GEAR FUNCTION
Diagnostic Procedure
AT-147
4
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-280.
I
Shift solenoid valve A
I
Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
SAT044K
OK or NG
OK
©
GO TO 5.
NG
©
Replace solenoid valve assembly.
5
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-312.
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 6.
NG
©
Repair control valve.
6
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 11.
NG
©
Check control valve again. Repair or replace control valve assembly.
DTC P0734 A/T 4TH GEAR FUNCTION
Diagnostic Procedure (Cont’d)
AT-148
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