1999 NISSAN PRIMERA Control

DescriptionNCAT0055The torque converter clutch solenoid valve is activated, 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 CVT 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
NCAT0055S01Remarks: 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 VALUENCAT0055S02Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
3 GY/RTorque converter
clutch solenoid
valve
When CVT performs lock-up.Approx. 12.0V
When CVT does not perform lock-
up.Approx. 0V
ON BOARD DIAGNOSIS LOGICNCAT0055S03
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.IHarness or connectors
(The solenoid circuit is open or shorted.)
IT/C clutch solenoid valve
: P0740
: MI Code No. 0740
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0055S04NOTE:
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.
SAT651J
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Description
AT-69

Wiring Diagram Ð AT Ð TCVNCAT0207
M48
GY/R GY/RF102
GY/R
M48
F71
AT-TCV-01
M53
5
15 16 17 1918620414313212721822923W 3
21LU
DUTY SOL
9
11110
24
W
3 2 1 45678
910 11 12 13 14 15 16 17 18
19 20 21 22 23 24
F71 GY/R
F10254
96 2
7 3
81
G10
YAT149
TCM
(TRANSMISSION
CONTROL
MODULE)
: Detectable line for DTC
: Non-detectable line for DTC
CONTROL VALVE
(TORQUE
CONVERTER
CLUTCH
SOLENOID VALVE)
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Wiring Diagram Ð AT Ð TCV
AT-71

Wiring Diagram Ð AT Ð LPSVNCAT0209
OR/L P/B
OR/L P/B
OR/L P/B
P/B
OR/L22 20M53
M48
OR/L
M48
F86F102F71
AT-LPSV-01
515 16 17 1918620414313212721822923W 1 PL DUTY
SOL
8 2
2
1F86
11110
24
PL DUTY
SOL (DR)
W
3 2 1 45678
910 11 12 13 14 15 16 17 18
19 20 21 22 23 24
F71
F102
2 1
GY54
96 2
7 3
81
G10
YAT150
TCM
(TRANSMISSION
CONTROL
MODULE)
: Detectable line for DTC
: Non-detectable line for DTC
DROPPING
RESISTOR
CONTROL VALVE
(LINE PRESSURE
SOLENOID VALVE)
DTC P0745 LINE PRESSURE SOLENOID VALVE
Wiring Diagram Ð AT Ð LPSV
AT-76

Diagnostic ProcedureNCAT0071
1 CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control.
Refer to EC section [ªMalfunction Indicator (MI)º, ªON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONº].
OK or NG
OK (With CONSULT-II)©GO TO 2.
OK (Without CONSULT-II)©GO TO 3.
NG©Check throttle position sensor circuit for engine control. Refer to EC section (ªDTC
P0120 THROTTLE POSITION SENSORº).
2 CHECK INPUT SIGNAL (With CONSULT-II)
With CONSULT-II
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªCVTº with CONSULT-II.
3. Read out the value of ªTHRTL POS SENº.
Voltage:
Fully-closed throttle:
Approximately 0.5V
Fully-open throttle:
Approximately 4V
OK or NG
OK©GO TO 4.
NG©Check harness for short or open between ECM and TCM regarding throttle position sen-
sor circuit. (Main harness)
3 CHECK INPUT SIGNAL (Without CONSULT-II)
Without CONSULT-II
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Check voltage between TCM terminals 41 and 42 while accelerator pedal is depressed slowly.
Voltage:
Fully-closed throttle valve:
Approximately 0.5V
Fully-open throttle valve:
Approximately 4V
(Voltage rises gradually in response to throttle position)
SAT453J
OK or NG
OK©GO TO 5.
NG©Check harness for short or open between ECM and TCM regarding throttle position sen-
sor circuit. (Main harness)
DTC P1705 THROTTLE POSITION SENSOR
Diagnostic Procedure
AT-82

DescriptionNCAT0224IThe step motor is ON/OFF of 4 aspects changes according to
the signal from TCM.
As a result, the flow of line pressure to primary pulley is
changed and pulley ratio is controlled.
CONSULT-II REFERENCE VALUE IN DATA MONITOR
MODE
NCAT0224S01Remarks: Specification data are reference values.
Monitor item Condition Specification
Step motorThe vehicle runs a safe condition and
press/depress accelerator pedal.ON/OFF
TCM TERMINALS AND REFERENCE VALUENCAT0224S02Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
11 P U
Step motorWithin 2 seconds after key switch ªONº, the time measurement by
using the pulse width measurement function (Hi level) of CON-
SULT-II.
ICONSULT-II cable connect to data link connector.
IThis inspection cannot be measured by circuit tester.30.0 msec
12 L/W10.0 msec
20 L/Y30.0 msec
21 P/L10.0 msec
ON BOARD DIAGNOSIS LOGICNCAT0224S03
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: STEP MOTOR/CIRC
When in operating step motor ON and
OFF, there is no proper change in the
voltage of the terminal TCM which corre-
sponds to it.IHarness or connectors
(The step motor circuit is open or
shorted.)
IStep motor
: P1777
: MI Code No. 1777
DTC P1777 STEP MOTOR Ð CIRCUIT
Description
AT-86

Wiring Diagram Ð AT Ð STMNCAT0225
YAT208
TCM
(TRANSMISSION
CONTROL MODULE)
: Detectable line for DTC
: Non-detectable line for DTC
CONTROL
VA LV E
(STEP MOTOR)
DTC P1777 STEP MOTOR Ð CIRCUIT
Wiring Diagram Ð AT Ð STM
AT-88

Component Inspection=NCAT0227STEP MOTORNCAT0227S01Resistance CheckNCAT0227S0101ICheck resistance between terminals.
Control valve Terminal No. Resistance (Approx.)
Step motor2 and 3
28W
4 and 5
2 and ground
14W 3 and ground
4 and ground
5 and ground
SAT690J CVT fluid pressure sensor connector
DTC P1777 STEP MOTOR Ð CIRCUIT
Component Inspection
AT-90

DescriptionNCAT0228IThe step motor is ON/OFF of 4 aspects changes according to
the signal from TCM.
As a result, the flow of line pressure to primary pulley is
changed and pulley ratio is controlled.
IThis diagnosis item detects when electrical system is OK but,
mechanical system is NG.
IThis diagnosis item detects when the state that the changing
the speed mechanism in unit does not operate normally.
CONSULT-II REFERENCE VALUE IN DATA MONITOR
MODE
NCAT0228S01It is monitoring whether ªCVT RATIO: 2.32 - 0.47º changes similarly
to ªPLY CONT STEP: 3 - 200º by DATA MONITOR mode.
ON BOARD DIAGNOSIS LOGICNCAT0228S03
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: STEP MOTOR/FNCTN
When not changing the speed according
to the instruction of TCM.IStep motor
: P1778
: MI Code No. 1778
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0228S04CAUTION:
IAlways drive vehicle at a safe speed.
IBe careful not to rev engine into the red zone on the
tachometer.
IBefore start ªDIAGNOSTIC TROUBLE CODE (DTC) CON-
FIRMATION PROCEDUREº, confirm ªHiº or ªMidº or
ªLowº fixation by ªI/P PULLY SPDº and ªVHCL SPEED SEº
on ªDATA MONITOR MODEº.
IIf hi-geared fixation, go to diagnostic procedure soon.
NOTE:
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 and select ªDATA MONITORº mode
for ªCVTº with CONSULT-II.
SAT651J
SAT971J
DTC P1778 STEP MOTOR Ð FUNCTION
Description
AT-91