Nissan Tiida C11. Manual — part 1257
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
TM-79
< COMPONENT DIAGNOSIS >
[TYPE 1 (4AT: RE4F03B)]
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During
TM-183, "Cruise Test - Part 1"
.
Does A/T shift from D
3
to D
4
at the specified speed?
YES
>> GO TO 10.
NO
>> Check control valve again. Repair or replace control
valve assembly.
10.
CHECK DTC
Perform
TM-76, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 11. Check for proper lock-up.
11.
CHECK LOCK-UP
During
TM-183, "Cruise Test - Part 1"
.
A/T perform lock-up at the specified speed?
YES
>> Perform “Cruise test — Part 1” again and return to the
start point of this test group.
NO
>> GO TO 12.
12.
CHECK VALVE RESISTANCE
1.
Remove control valve assembly. Refer to
TM-191, "Control Valve Assembly and Accumulators"
-
Torque converter clutch solenoid valve
2.
Check resistance between terminal cord assembly harness con-
nector terminal and ground.
OK or NG
OK
>> GO TO 13.
NG
>> Replace solenoid valve assembly.
13.
CHECK VALVE OPERATION
1.
Remove control valve assembly. Refer to
TM-191, "Control Valve Assembly and Accumulators"
-
Torque converter clutch solenoid valve
SCIA7190E
SCIA7191E
Solenoid valve
Terminal
Resistance
(Approx.)
Torque converter clutch solenoid valve
5
Ground
5 - 20
Ω
SCIA2063E
TM-80
< COMPONENT DIAGNOSIS >
[TYPE 1 (4AT: RE4F03B)]
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
2.
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
OK or NG
OK
>> GO TO 14.
NG
>> Replace solenoid valve assembly.
14.
CHECK CONTROL VALVE
1.
Disassemble control valve assembly. Refer to
TM-243, "Control Valve Assembly"
.
2.
Check control valves for sticking.
-
Torque converter clutch control valve
-
Torque converter clutch relief valve
OK or NG
OK
>> GO TO 15.
NG
>> Repair control valve.
15.
CHECK LOCK-UP
During
TM-183, "Cruise Test - Part 1"
.
A/T perform lock-up at the specified speed?
YES
>> GO TO 16.
NO
>> Check control valve again. Repair or replace control
valve assembly.
16.
CHECK DTC
Perform
TM-76, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> Perform “Cruise test — Part 1” again and return to the start point of this test group.
SCIA2066E
SCIA7191E
DTC P0745 LINE PRESSURE SOLENOID VALVE
TM-81
< COMPONENT DIAGNOSIS >
[TYPE 1 (4AT: RE4F03B)]
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DTC P0745 LINE PRESSURE SOLENOID VALVE
Description
INFOID:0000000001694348
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to signals sent from the TCM.
The line pressure duty cycle value is not constant when the closed throttle position switch is ON. To
confirm the line pressure duty cycle at low-pressure, the accelerator (throttle) should be open until the
closed throttle position switch is OFF.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001694349
Remarks: Specification data are reference values.
On Board Diagnosis Logic
INFOID:0000000001694350
• This is an OBD self-diagnostic item.
• Diagnostic trouble code “P0745 LINE PRESSURE S/V” with CONSULT-III or 11th judgement flicker without
CONSULT-III is detected when TCM detects an improper voltage drop while it tries to operate the solenoid
valve.
Possible Cause
INFOID:0000000001694351
• Harness or connector
(The solenoid circuit is open or shorted.)
• Line pressure solenoid valve
DTC Confirmation Procedure
INFOID:0000000001694352
CAUTION:
If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1.
Turn ignition switch ON and select “DATA MONITOR” mode for “A/T” with CONSULT-III.
2.
Touch “START”.
3.
Depress accelerator pedal completely and wait at least 1 second.
4.
If the check result is NG, go to
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1.
Start engine.
2.
With brake pedal depressed, shift the lever from “P”
→
“N”
→
“D”
→
“N”
→
“P” positions.
3.
Perform self-diagnosis. Refer to
TM-38, "Diagnosis Procedure without CONSULT-III"
4.
If the check result is NG, go to
Diagnosis Procedure
INFOID:0000000001694354
1.
CHECK INPUT SIGNAL
With CONSULT-III
1.
Turn ignition switch ON. (Do not start engine.)
2.
Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-III.
3.
Read out the value of “LINE PRES DTY” while driving. Check the value changes according to driving
speed.
Item name
Condition
Display value (Approx.)
LINE PRES DTY
Small throttle opening (Low line pressure)
⇔
Large
throttle opening (High line pressure)
0%
⇔
94%
TM-82
< COMPONENT DIAGNOSIS >
[TYPE 1 (4AT: RE4F03B)]
DTC P0745 LINE PRESSURE SOLENOID VALVE
Without CONSULT-III
1.
Turn ignition switch ON. (Do not start engine.)
2.
Check voltage between TCM connector terminals and ground.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 2.
2.
CHECK DROPPING RESISTOR
1.
Turn ignition switch OFF.
2.
Disconnect dropping resistor harness connector in engine room.
3.
Check resistance between terminals.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
CHECK VALVE RESISTANCE
1.
Turn ignition switch OFF.
2.
Disconnect terminal cord assembly connector in engine room.
Item name
Condition
Display value
LINE PRES DTY
Small throttle opening (Low line pressure)
⇔
Large throttle opening (High line pres-
sure)
0%
⇔
94%
Item
Connec-
tor
Terminal
Condition
Judge-
ment stan-
dard
(Approx.)
Line pres-
sure sole-
noid valve
E31
1 - Ground
When releasing accelera-
tor pedal after warming
up engine.
1.5 - 3.0V
When depressing accel-
erator pedal fully after
warming up engine.
0V
Line pres-
sure sole-
noid valve
(with drop-
ping resis-
tor)
E31
2 - Ground
When releasing accelera-
tor pedal after warming
up engine.
4 - 14V
When depressing accel-
erator pedal fully after
warming up engine.
0V
SCIA3267E
Item
Connector
Terminal
Resistance (Approx.)
Dropping resistor
E49
1 - 2
12
Ω
SCIA4950E
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