Infiniti I30 (A33). Manual — part 38
7
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-280.
I
Line pressure solenoid valves
2. Check resistance to the terminal and ground.
SAT625J
OK or NG
OK
©
GO TO 9.
NG
©
Replace solenoid valve assembly.
8
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-280.
I
Line pressure solenoid valves
2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
SAT626J
OK or NG
OK
©
GO TO 9.
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 (Cont’d)
AT-149
9
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-312.
2. Check line pressure circuit valves for sticking.
I
Pressure regulator valve
I
Pilot valve
I
Pressure modifier valve
SAT367H
OK or NG
OK
©
GO TO 10.
NG
©
Repair control valve.
10
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.
11
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-144.
OK or NG
OK
©
INSPECTION END
NG
©
Perform “Cruise test — Part 1” again and return to the start point of this test group.
DTC P0734 A/T 4TH GEAR FUNCTION
Diagnostic Procedure (Cont’d)
AT-150
SAT283HB
Description
NHAT0058
The torque converter clutch solenoid valve is activated, with the
gear in D
4
, by the TCM in response to signals sent from the vehicle
speed and throttle position sensors. Lock-up piston operation will
then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up
condition, the engine speed should not change abruptly. If there is
a big jump in engine speed, there is no lock-up.
CONSULT-II REFERENCE VALUE IN DATA MONITOR
MODE
NHAT0058S01
Remarks: Specification data are reference values.
Monitor item
Condition
Specification
Torque converter clutch
solenoid valve duty
Lock-up OFF
"
Lock-up ON
Approximately 4%
"
Approximately 94%
TCM TERMINALS AND REFERENCE VALUE
NHAT0058S02
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
3
G/B
Torque converter
clutch solenoid
valve
When A/T performs lock-up.
8 - 15V
When A/T does not perform lock-up.
0V
On Board Diagnosis Logic
NHAT0225
Diagnostic trouble code TCC SOLENOID/CIRC with CONSULT-II
or P0740 without CONSULT-II is detected when TCM detects an
improper voltage drop when it tries to operate the solenoid valve.
Possible Cause
NHAT0226
Check the following items.
I
Torque converter clutch solenoid valve
I
Harness or connectors
(The solenoid circuit is open or shorted.)
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Description
AT-151
SAT014K
SEF949Y
Diagnostic Trouble Code (DTC) Confirmation
Procedure
NHAT0227
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
NHAT0227S01
1)
Turn ignition switch ON.
2)
Select “DATA MONITOR” mode for “ENGINE” with CON-
SULT-II and wait at least 1 second.
WITH GST
NHAT0227S02
Follow the procedure “With CONSULT-II”.
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Trouble Code (DTC) Confirmation Procedure
AT-152
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст