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