NISSAN PATROL 2000 Electronic Owner's Guide

SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)
DIAGNOSIS START
1. Start engine and warm it up to normal
engine operating temperature.
2. Turn ignition switch to ªOFFº position.
Wait at least 5 seconds.
1. Set A/T mode switch to ªAUTOº posi-
tion.
2. Set overdrive control switch in ªONº
position.
3. Move selector lever to ªPº position.
4. Turn ignition switch to ªONº position.
(Do not start engine.)
5. Does SPORT indicator lamp come on
for about 2 seconds?
Yes
cNo
Go to 1. SPORT Indicator
Lamp Does Not Come On,
AT-1097.
1. Turn ignition switch to ªACCº position.
2. Move selector lever to ªDº position.
1. Set overdrive control switch in ªOFFº
position.
2. Depress accelerator pedal fully and
release it.
3. Turn ignition switch ªONº.
(Do not start engine.)
1. Move selector lever to ª2º position.
2. Set overdrive control switch in ªONº
position.
VA
SAT211JA
SAT879E
SAT244I
SAT881E
SAT245I
.
.
.
.
.
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-1029

VA
1. Move selector lever to ª1º position.
2. Set overdrive control switch in ªOFFº
position.
Depress accelerator pedal fully and
release it.
Check SPORT indicator lamp.
Refer to JUDGEMENT OF SELF-DIAG-
NOSIS CODE, AT-1031.
DIAGNOSIS END
SAT246I
SAT981F
SAT211JA
.
.
.
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-1030

JUDGEMENT OF SELF-DIAGNOSIS CODE
SPORT indicator lamps:*1
All judgement flickers are same.
SAT819H
All circuits that can be confirmed by self-diagnosis are OK.
4th judgement flicker is longer than others.
SAT797HShift solenoid valve A circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE A, AT-1070.
1st judgement flicker is longer than others.
SAT794H
Revolution sensor circuit is short-circuited or disconnected.
Go to VEHICLE SPEED SENSORzA/T (REVOLUTION
SENSOR), AT-1064.
5th judgement flicker is longer than others.
SAT798H
Shift solenoid valve B circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE B, AT-1072.
2nd judgement flicker is longer than others.
SAT795H
Vehicle speed sensor circuit is short-circuited or discon-
nected.
Go to VEHICLE SPEED SENSORzMTR, AT-1066.
6th judgement flicker is longer than others.
SAT799H
Overrun clutch solenoid valve circuit is short-circuited or dis-
connected.
Go to OVERRUN CLUTCH SOLENOID VALVE, AT-1074.
3rd judgement flicker is longer than others.
SAT796H
Throttle (accelerator) position sensor circuit is short-circuited
or disconnected.
Go to ACCELERATOR POSITION SENSOR, AT-1068.
7th judgement flicker is longer than others.
SAT800H
Torque converter clutch solenoid valve circuit is short-cir-
cuited or disconnected.
Go to TORQUE CONVERTER CLUTCH SOLENOID
VALVE, AT-1076.
t1= 2.5 seconds t2= 2.0 seconds t3= 1.0 second
*1: Refer to applicable indicator lamps for specified areas on next page.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-1031

SPORT indicator lamps:
8th judgement flicker is longer than others.
SAT801H
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
Go to A/T FLUID TEMPERATURE SENSOR AND TCM
POWER SOURCE, AT-1079.
Flickers as shown below.
SAT804H
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. Ð This is not a prob-
lem.)
9th judgement flicker is longer than others.
SAT802H
Engine speed signal circuit is short-circuited or disconnected.
Go to ENGINE SPEED SIGNAL, AT-1082.
Does not come on.
SAT805H
PNP, overdrive control, A/T mode or accelerator position
switches circuit is disconnected or TCM is damaged.
Go to PNP, OVERDRIVE CONTROL, A/T MODE AND
ACCELERATOR POSITION SWITCHES, AT-1091.
10th judgement flicker is longer than others.
SAT803H
Line pressure solenoid valve circuit is short-circuited or dis-
connected.
Go to LINE PRESSURE SOLENOID VALVE, AT-1084.
t4= 1.0 second
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-1032

HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(With CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to
turn ignition switch ªOFFº once. Wait for at least 5 seconds
and then turn it ªONº again.
2. Turn CONSULT-II ªONº, and touch ªA/Tº.
3. Touch ªSELF-DIAG RESULTSº.
4. Touch ªERASEº. (The self-diagnostic results will be erased.)
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(Without CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to
turn ignition switch ªOFFº once. Wait for at least 5 seconds
and then turn it ªONº again.
2. Perform ªSELF-DIAGNOSTIC PROCEDURE (Without CON-
SULT-II)º. Refer to AT-1029.
3. Turn ignition switch ªOFFº. (The self-diagnostic results will be
erased.)
SAT014K
SAT971J
SAT970J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-1033

Diagnosis by CONSULT-II
NOTICE
1.The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service
Manual may differ slightly. This occurs because of the following reasons:
+Actual shift schedule has more or less tolerance or allowance,
+Shift schedule indicated in Service Manual refers to the point where shifts start. Gear position dis-
played on CONSULT-II indicates the point where shifts are completed.
3. Shift solenoid valve ªAº or ªBº is displayed on CONSULT-II at the start of shifting. Gear position is dis-
played upon completion of shifting (which is computed by TCM).
4. Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II
unit.
SELF-DIAGNOSTIC RESULT TEST MODE
Refer to AT-1028.
DATA MONITOR DIAGNOSTIC TEST MODE
Item DisplayMonitor item
Description Remarks TCM
input
signalsMain
signals
Vehicle speed sensor 1 (A/T)
(Revolution sensor)VHCL/S SEzA/T
[km/h] or [mph]
XÐ+Vehicle speed computed from
signal of revolution sensor is
displayed.When racing engine in ªNº or ªPº
position with vehicle stationary,
CONSULT data may not indicate
0 km/h (0 MPH).
Vehicle speed sensor 2
(Meter)VHCL/S SEzMTR
[km/h] or [mph]
XÐ+Vehicle speed computed from
signal of vehicle speed sensor
is displayed.Vehicle speed display may not be
accurate under approx. 10 km/h
(6 MPH). It may not indicate 0
km/h (0 MPH) when vehicle is
stationary.
Accelerator position sensor THRTL POS SEN
[V]XÐ+Accelerator position sensor sig-
nal voltage is displayed.
A/T fluid temperature sensor FLUID TEMP SE
[V]
XÐ+A/T fluid temperature sensor
signal voltage is displayed.
+Signal voltage lowers as fluid
temperature rises.
Battery voltage BATTERY VOLT
[V]XÐ+Source voltage of TCM is dis-
played.
Engine speed ENGINE SPEED
[rpm]
XX+Engine speed, computed from
engine speed signal, is dis-
played.Engine speed display may not be
accurate under approx. 800 rpm.
It may not indicate 0 rpm even
when engine is not running.
Overdrive control switch OVERDRIVE SW
[ON/OFF] X Ð+ON/OFF state computed from
signal of overdrive control SW
is displayed.
P/N position switch PN POSI SW
[ON/OFF] X Ð+ON/OFF state computed from
signal of PN position SW is dis-
played.
R position switch R POSITION SW
[ON/OFF] X Ð+ON/OFF state computed from
signal of R position SW is dis-
played.
D position switch D POSITION SW
[ON/OFF] X Ð+ON/OFF state computed from
signal of D position SW is dis-
played.
2 position switch 2 POSITION SW
[ON/OFF] X Ð+ON/OFF status, computed from
signal of 2 position SW, is dis-
played.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-1034

Item DisplayMonitor item
Description Remarks TCM
input
signalsMain
signals
1 position switch 1 POSITION SW
[ON/OFF] X Ð+ON/OFF status, computed from
signal of 1 position SW, is dis-
played.
ASCD-cruise signal ASCD-CRUISE
[ON/OFF]
XÐ+Status of ASCD cruise signal is
displayed.
ON ... Cruising state
OFF ... Normal running state+This is displayed even when no
ASCD is mounted.
ASCD-OD cut signal ASCD-OD CUT
[ON/OFF]
XÐ+Status of ASCDzOD release
signal is displayed.
ON ... OD released
OFF ... OD not released+This is displayed even when no
ASCD is mounted.
Kickdown switch KICKDOWN SW
[ON/OFF] X Ð+ON/OFF status, computed from
signal of kickdown SW, is dis-
played.+This is displayed even when no
kickdown switch is equipped.
A/T mode switch POWER SHIFT SW
[ON/OFF] X Ð+ON/OFF state computed from
signal of POWER shift SW is
displayed.
Closed throttle position switch CLOSED THL/SW
[ON/OFF]
XÐ+ON/OFF status, computed from
signal of closed throttle (accel-
erator) position SW, is dis-
played.
Wide open throttle position switch W/O THRL/P-SW
[ON/OFF]
XÐ+ON/OFF status, computed from
signal of wide open throttle
(accelerator) position SW, is
displayed.
A/T mode switch HOLD SW
[ON/OFF] X Ð+ON/OFF status, computed from
signal of HOLD shift SW, is
displayed.
Gear position GEAR
ÐX+Gear position data used for
computation by TCM, is dis-
played.
Selector lever position SLCT LVR POSI
ÐX+Selector lever position data,
used for computation by TCM,
is displayed.+A specific value used for con-
trol is displayed if fail-safe is
activated due to error.
Vehicle speed VEHICLE SPEED
[km/h] or [mph] Ð X+Vehicle speed data, used for
computation by TCM, is dis-
played.
Accelerator position THROTTLE POSI
[/8] Ð X+Throttle (accelerator) position
data, used for computation by
TCM, is displayed.+A specific value used for con-
trol is displayed if fail-safe is
activated due to error.
Line pressure duty LINE PRES DTY
[%]
ÐX+Control value of line pressure
solenoid valve, computed by
TCM from each input signal, is
displayed.
Torque converter clutch solenoid
valve dutyTCC S/V DUTY
[%]
ÐX+Control value of torque con-
verter clutch solenoid valve,
computed by TCM from each
input signal, is displayed.
Shift solenoid valve A SHIFT S/V A
[ON/OFF]
ÐX+Control value of shift solenoid
valve A, computed by TCM
from each input signal, is dis-
played.Control value of solenoid is dis-
played even if solenoid circuit is
disconnected.
The ªOFFº signal is displayed if
solenoid circuit is shorted.
Shift solenoid valve B SHIFT S/V B
[ON/OFF]
ÐX+Control value of shift solenoid
valve B, computed by TCM
from each input signal, is dis-
played.
Overrun clutch solenoid valve OVERRUN/C S/V
[ON/OFF]
ÐX+Control value of overrun clutch
solenoid valve computed by
TCM from each input signal is
displayed.
Self-diagnosis display lamp
(SPORT indicator lamp)SELF-D DP LMP
[ON/OFF]ÐX+Control status of SPORT indi-
cator lamp is displayed.
X: Applicable
Ð: Not applicable
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnosis by CONSULT-II (Cont'd)
AT-1035

Introduction
The TCM receives a signal from the vehicle-speed sensor, accel-
erator position sensor or PNP switch and provides shift control
or lock-up control via solenoid valves.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs inter-
mittently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems. A
road test with CONSULT-II or a circuit tester connected should
be performed. Follow the ªWork Flowº. Refer to AT-1040.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The
customer can supply good information about such problems,
especially intermittent ones. Find out what symptoms are present
and under what conditions they occur. A ªDiagnostic Worksheetº
like the example (AT-1038) should be used.
Start your diagnosis by looking for ªconventionalº problems first.
This will help troubleshoot driveability problems on an electroni-
cally controlled engine vehicle.
SAT631IA
SAT632I
SEF234G
TROUBLE DIAGNOSIS Ð Introduction
AT-1036

Diagnostic Worksheet
INFORMATION FROM CUSTOMER
KEY POINTS
WHAT...................... Vehicle & A/T model
WHEN..................... Date, Frequencies
WHERE.................. Road conditions
HOW....................... Operating conditions, Symptoms
Customer name MR/MS Model & Year VIN
Trans. model Engine Mileage
Incident Date Manuf. Date In Service Date
FrequencyNContinuousNIntermittent ( times a day)
SymptomsNVehicle does not move. (NAny positionNParticular position)
NNo up-shift (N1st®2ndN2nd®3rdN3rd®O/D)
NNo down-shift (NO/D®3rdN3rd®2ndN2nd®1st)
NLockup malfunction
NShift point too high or too low.
NShift shock or slip (NN®DNLockupNAny drive position)
NNoise or vibration
NNo kickdown
NNo pattern select
NOthers
()
SPORT indicator lamp Blinks for about 8 seconds.
NContinuously litNNot lit
Malfunction indicator (MI)NContinuously litNNot lit
TROUBLE DIAGNOSIS Ð Introduction
AT-1037

DIAGNOSTIC WORKSHEET
1.NRead the Fail-safe and listen to customer complaints. AT-1006
2.NA/T FLUID CHECK AT-1041
NLeakage (Follow specified procedure)
NFluid condition
NFluid level
3.NPerform STALL TEST and LINE PRESSURE TEST. AT-1041,
AT-1044
NStall test Ð Mark possible damaged components/others.
NTorque converter one-way clutch
NReverse clutch
NForward clutch
NOverrun clutch
NForward one-way clutchNLow & reverse brake
NLow one-way clutch
NEngine
NLine pressure is low
NClutches and brakes except high
clutch and brake band are OK
NLine pressure test Ð Suspected parts:
4.NPerform all ROAD TEST and mark required procedures. AT-1046
4-1. Check before engine is started. AT-1047
NSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
NVehicle speed sensorzA/T (Revolution sensor), AT-1064.
NVehicle speed sensorzMTR, AT-1066.
NAccelerator position sensor, AT-1068.
NShift solenoid valve A, AT-1070.
NShift solenoid valve B, AT-1072.
NOverrun clutch solenoid valve, AT-1074.
NTorque converter clutch solenoid valve, AT-1076.
NA/T fluid temperature sensor and TCM power source, AT-1079.
NEngine speed signal, AT-1082.
NLine pressure solenoid valve, AT-1084.
NPNP, overdrive control, A/T mode and accelerator position switches,
AT-1091.
NBattery
NOthers
4-2. Check at idle AT-1049
N1. SPORT Indicator Lamp Does Not Come On, AT-1097.
N2. SPORT Indicator Lamp Does Not Come On, AT-1098.
N3. O/D OFF Indicator Lamp Does Not Come On, AT-1098.
N4. SPORT Indicator Lamp Does Not Come On AT-1099.
N5. Engine Cannot Be Started In ªPº And ªNº Position, AT-1100.
N6. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed,
AT-1100.
N7. In ªNº Position, Vehicle Moves, AT-1101.
N8. Large Shock. ªNº®ªRº Position, AT-1102.
N9. Vehicle Does Not Creep Backward In ªRº Position, AT-1103.
N10. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position, AT-1104.
4-3. Cruise test AT-1050,
AT-1053
Part-1
N11. Vehicle Cannot Be Started From D
1, AT-1105.
N12. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2, AT-1106.
N13. A/T Does Not Shift: D
2®D3, AT-1107.
N14. A/T Does Not Shift: D
3®D4, AT-1108.
N15. A/T Does Not Perform Lock-up, AT-1109.
N16. A/T Does Not Hold Lock-up Condition, AT-1110.
N17. Lock-up Is Not Released, AT-1110.
N18. Engine Speed Does Not Return To Idle (Light Braking D
4®D3), AT-1111.
TROUBLE DIAGNOSIS Ð Introduction
Diagnostic Worksheet (Cont'd)
AT-1038