Infiniti I30 (A33). Manual — part 33
3
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to “Control Valve Assembly”, 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 4.
NG
©
Repair control valve assembly.
4
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-125.
OK or NG
OK
©
INSPECTION END
NG
©
Check control valve again. Repair or replace control valve assembly.
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DTC P0731 A/T 1ST GEAR FUNCTION
Diagnostic Procedure (Cont’d)
AT-129
Description
NHAT0049
I
This is an OBD-II self-diagnostic item and not available in TCM
self-diagnosis.
I
This malfunction will not be detected while the O/D OFF indi-
cator lamp is indicating another self-diagnosis malfunction.
I
This malfunction is detected when the A/T does not shift into
second gear position as instructed by the TCM. This is not
caused by electrical malfunction (circuits open or shorted) but
by mechanical malfunction such as control valve sticking,
improper solenoid valve operation, etc.
Gear position
1
2
3
4
Shift solenoid valve A
ON (Closed)
OFF (Open)
OFF (Open)
ON (Closed)
Shift solenoid valve B
ON (Closed)
ON (Closed)
OFF (Open)
OFF (Open)
TCM TERMINALS AND REFERENCE VALUE
NHAT0049S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
12
LG/B
Shift solenoid
valve B
When shift solenoid valve B operates.
(When driving in D
1
or D
2
.)
Battery volt-
age
When shift solenoid valve B does not oper-
ate.
(When driving in D
3
or D
4
.)
0V
On Board Diagnosis Logic
NHAT0216
This diagnosis monitors actual gear position by checking the torque
converter slip ratio calculated by TCM as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (2nd) sup-
posed by TCM, the slip ratio will be more than normal. In case the
ratio exceeds the specified value, TCM judges this diagnosis mal-
function.
This malfunction will be caused when shift solenoid valve B is stuck
open.
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 open: 4,
3*, 3 and 4 positions to each gear position above
*: P0732 is detected.
Diagnostic trouble code A/T 2ND GR FNCTN with CONSULT-II or
P0732 without CONSULT-II is detected when A/T cannot be shifted
to the 2nd gear position even if electrical circuit is good.
DTC P0732 A/T 2ND GEAR FUNCTION
Description
AT-130
Possible Cause
NHAT0217
Check the following items.
I
Shift solenoid valve B
I
Each clutch
I
Hydraulic control circuit
SAT014K
SAT971J
SAT021J
Diagnostic Trouble Code (DTC) Confirmation
Procedure
NHAT0218
CAUTION:
I
Always drive vehicle at a safe speed.
I
Be careful not to rev engine into the red zone on the
tachometer.
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.
TESTING CONDITION:
Always drive vehicle on a level road to improve the accuracy
of test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
WITH CONSULT-II
NHAT0218S01
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 the vehicle to decrease the voltage (warm
up the fluid) or stop engine to increase the voltage (cool down
the fluid).
3)
Select “2ND GR FNCTN P0732” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4)
Accelerate vehicle to 63 to 68 km/h (39 to 42 MPH) under the
following condition and release the accelerator pedal com-
pletely.
THROTTLE POSI: Less than 1.0/8
Selector lever: D position (O/D ON)
I
Check that “GEAR” shows “3” or “4” after releasing pedal.
5)
Depress accelerator pedal to WOT (more than 7.0/8 of
“THROTTLE POSI”) quickly from a speed of 63 to 68 km/h (39
to 42 MPH) until “TESTING” changes to “STOP VEHICLE” or
“COMPLETE”. (It will take approximately 3 seconds.)
If the check result NG appears on CONSULT-II screen, go to
“DIAGNOSTIC PROCEDURE”, AT-134.
If “STOP VEHICLE” appears on CONSULT-II screen, go to
following step.
I
Check that “GEAR” shows “2” when depressing accelera-
tor pedal to WOT.
I
If “TESTING” does not appear on CONSULT-II for a long
time, select “SELF-DIAG RESULTS” for “ENGINE”. In case
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DTC P0732 A/T 2ND GEAR FUNCTION
Possible Cause
AT-131
a 1st trip DTC other than P0732 is shown, refer to appli-
cable “TROUBLE DIAGNOSIS FOR DTC”.
6)
Stop vehicle.
7)
Follow the instruction displayed. (Check for normal shifting
referring to the table below.)
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 P0732 exists.
4
,
3
,
3
,
4
8)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”, AT-134.
Refer to shift schedule, AT-382.
WITH GST
NHAT0218S02
Follow the procedure “With CONSULT-II”.
DTC P0732 A/T 2ND GEAR FUNCTION
Diagnostic Trouble Code (DTC) Confirmation Procedure (Cont’d)
AT-132
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