Infiniti I30 (A33). Manual — part 40
This malfunction will be caused when shift solenoid valve B is stuck
closed.
Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 posi-
tions
In case of gear position with shift solenoid valve B stuck closed: 1,
2, 2 and 1* positions to each gear position above
*: P0744 is detected.
Diagnostic trouble code A/T TCC S/V FNCTN with CONSULT-II or
P0744 without CONSULT-II is detected when A/T cannot perform
lock-up even if electrical circuit is good.
Possible Cause
NHAT0229
Check the following items.
I
Line pressure solenoid valve
I
Torque converter clutch solenoid valve
I
Each clutch
I
Hydraulic control circuit
SAT014K
SAT971J
SAT021J
Diagnostic Trouble Code (DTC) Confirmation
Procedure
NHAT0230
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” 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
NHAT0230S01
1)
Start engine and select “DATA MONITOR” mode for “A/T” with
CONSULT-II.
2)
Make sure that output voltage of A/T fluid temperature sensor
is within the range below.
FLUID TEMP SEN: 0.4 - 1.5V
If out of range, drive vehicle to decrease voltage (warm up the
fluid) or stop engine to increase voltage (cool down the fluid).
3)
Select “TCC S/V FNCTN P0744” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4)
Accelerate vehicle to more than 70 km/h (43 MPH) and main-
tain the following condition continuously until “TESTING” has
turned to “COMPLETE”. (It will take approximately 30 seconds
after “TESTING” shows.)
THROTTLE POSI: 1.0/8 - 2.0/8 (at all times during step 4)
Selector lever: D position (O/D ON)
TCC S/V DUTY: More than 94%
VHCL/S SE·A/T: Constant speed of more than 70 km/h (43
MPH)
I
Check that “GEAR” shows “4”.
I
For shift schedule, refer to SDS, AT-382.
I
If “TESTING” does not appear on CONSULT-II for a long
time, select “SELF-DIAG RESULTS”. In case a 1st trip DTC
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)
On Board Diagnosis Logic (Cont’d)
AT-157
other than P0744 is shown, refer to applicable “TROUBLE
DIAGNOSIS FOR DTC”.
5)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”, AT-160.
Refer to shift schedule, AT-382.
WITH GST
NHAT0230S02
Follow the procedure “With CONSULT-II”.
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Diagnostic Trouble Code (DTC) Confirmation Procedure (Cont’d)
AT-158
Wiring Diagram — AT — TCCSIG
=NHAT0062
MAT057B
SAT306K
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-159
Diagnostic Procedure
NHAT0063
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 6.
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Diagnostic Procedure
AT-160
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