NISSAN ALMERA N16 2001 Electronic Repair Manual

Wiring Diagram Ð AT Ð 4THNJAT0292
YAT238
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Wiring Diagram Ð AT Ð 4TH
AT-225

Diagnostic ProcedureNJAT0293
1 CHECK SHIFT UP (D3TO D4)
During ªCruise test Ð Part 1º (AT-93), does A/T shift from D3to D4at the specified speed?
SAT988H
YesorNo
Ye s©GO TO 9.
No©GO TO 2.
2 CHECK LINE PRESSURE
Perform line pressure test.
Refer to AT-82.
MTBL0507
OK or NG
OK©GO TO 3.
NG©GO TO 6.
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Diagnostic Procedure
AT-226

3 CHECK SOLENOID VALVES
1. Remove control valve assembly.
Refer to AT-343.
2. Refer to ªComponent Inspectionº, AT-230.
SAT847JB
OK or NG
OK©GO TO 4.
NG©Replace solenoid valve assembly.
4 CHECK CONTROL VALVE
1. Disassemble control valve assembly.
Refer to AT-375.
2. Check to ensure that:
+Valve, sleeve and plug slide along valve bore under their own weight.
+Valve, sleeve and plug are free from burrs, dents and scratches.
+Control valve springs are free from damage, deformation and fatigue.
+Hydraulic line is free from obstacles.
SAT367H
OK or NG
OK©GO TO 5.
NG©Repair control valve.
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Diagnostic Procedure (Cont'd)
AT-227

5 CHECK SHIFT UP (D3TO D4)
Does A/T shift from D3to D4at the specified speed?
OK or NG
OK©GO TO 9.
NG©Check control valve again. Repair or replace control valve assembly.
6 CHECK LINE PRESSURE SOLENOID VALVE
1. Remove control valve assembly.
Refer to AT-343.
2. Refer to ªComponent Inspectionº, AT-230.
SAT888JA
OK or NG
OK©GO TO 7.
NG©Replace solenoid valve assembly.
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Diagnostic Procedure (Cont'd)
AT-228

7 CHECK CONTROL VALVE
1. Disassemble control valve assembly.
Refer to AT-375.
2. Check line pressure circuit valves for sticking.
+Pressure regulator valve
+Pilot valve
+Pressure modifier valve
SAT367H
OK or NG
OK©GO TO 8.
NG©Repair control valve.
8 CHECK SHIFT UP (D3TO D4)
Does A/T shift from D3to D4at the specified speed?
YesorNo
Ye s©GO TO 9.
No©Check control valve again. Repair or replace control valve assembly.
9 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-223.
OK or NG
OK©INSPECTION END
NG©Perform ªCruise test Ð Part 1º again and return to the start point of this test group.
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Diagnostic Procedure (Cont'd)
AT-229

SAT848JB
Component Inspection=NJAT0294SOLENOID VALVESNJAT0294S01+For removal, refer to AT-343.
Resistance CheckNJAT0294S0101+Check resistance between two terminals.
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve A2
Ground20-30W
Shift solenoid
valve B1 5-20W
Line pressure
solenoid valve4 2.5-5W
SAT847JB
Operation CheckNJAT0294S0102+Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
DTC P0734 A/T 4TH GEAR FUNCTIONEURO-OBD
Component Inspection
AT-230

SAT322GC
DescriptionNJAT0295The torque converter clutch solenoid valve is activated, with the
gear in ªD
4º, by the TCM in response to signals sent from the
vehicle speed and throttle position sensors. Lock-up piston opera-
tion 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
NJAT0295S01Remarks: Specification data are reference values.
Monitor item Condition Specification
Torque converter clutch solenoid valve
dutyLock-up ªOFFº
¯
Lock-up ªONºApproximately 4%
¯
Approximately 94%
TCM TERMINALS AND REFERENCE VALUENJAT0295S02Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
3 GY/RTorque converter
clutch solenoid
valve
When A/T performs lock-up. 8 - 15V
When A/T does not perform lock-
up.1V or less
ON BOARD DIAGNOSIS LOGICNJAT0295S03
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: TCC SOLENOID/CIRC TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.+Harness or connectors
(The solenoid circuit is open or shorted.)
+T/C clutch solenoid valve
: P0740
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EURO-OBD
Description
AT-231

SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NJAT0295S04NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº 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
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode for ªENGINEº with CON-
SULT-II and wait at least 1 second.
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EURO-OBD
Description (Cont'd)
AT-232

Wiring Diagram Ð AT Ð TCVNJAT0296
YAT239
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EURO-OBD
Wiring Diagram Ð AT Ð TCV
AT-233

Diagnostic ProcedureNJAT0297
1 CHECK VALVE RESISTANCE
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 5 and ground.
Resistance:
5-20W
SAT889JB
OK or NG
OK©GO TO 2.
NG©1. Remove oil pan. Refer to AT-343.
2. Check the following items:
+Torque converter clutch solenoid valve
Refer to ªComponent Inspectionº, AT-236.
+Harness of terminal cord assembly for short or open
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EURO-OBD
Diagnostic Procedure
AT-234