2000 NISSAN PATROL Electronic Repair Manual

9. Vehicle Does Not Creep Backward In ªRº
Position
SYMPTOM:
Vehicle does not creep backward when selecting ªRº posi-
tion.
Check A/T fluid level again.
OK
cNG
Refill ATF.
VA
NG in both ª1º
and ªRº positions
Check stall revolution with selector lever
in ª1º and ªRº positions.
OK
OK in ª1º position
NG in ªRº position
c1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Valves to control line
pressure (Pressure
regulator valve, pressure
modifier valve, pilot
valve and pilot filter)
+Line pressure solenoid
valve
3. Disassemble A/T.
4. Check the following
items:
+Oil pump assembly
+Torque converter
+Reverse clutch assem-
bly
+High clutch assembly
+Low & reverse brake
assembly
+Low one-way clutch
1. Remove control valve assem-
bly. Refer to AT-1124.
2. Check the following items:
+Valves to control line pressure
(Pressure regulator valve, pres-
sure modifier valve, pilot valve
and pilot filter)
+Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
+Oil pump assembly
+Torque converter
+Reverse clutch assembly
+High clutch assembly
Check line pressure at idle with selector
lever in ªRº position. Refer to ªLine Pres-
sure Testº, AT-1044.
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Valves to control line
pressure (Pressure
regulator valve, pressure
modifier valve, pilot
valve and pilot filter)
+Line pressure solenoid
valve
3. Disassemble A/T.
4. Check the following
item:
+Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
NG OK
VA
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT638A
SAT493G
SAT494G
SAT171B
..
.
.
.
.
.
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1103

10. Vehicle Does Not Creep Forward In ªDº,
ª2º Or ª1º Position
SYMPTOM:
Vehicle does not creep forward when selecting ªDº, ª2º or
ª1º position.
Check A/T fluid level again.
OK
cNG
Refill ATF.
VA
Check stall revolution with selector lever in
ªDº position. Refer to ªSTALL TESTº,
AT-1041.
OK
cNG
1. Remove control
valve assembly.
Refer to AT-1124.
2. Check the following
items:
+Valves to control line
pressure (Pressure
regulator valve, pres-
sure modifier valve,
pilot valve and pilot
filter)
+Line pressure sole-
noid valve
3. Disassemble A/T.
4. Check the following
items:
+Oil pump assembly
+Forward clutch
assembly
+Forward one-way
clutch
+Low one-way clutch
+Low & reverse brake
assembly
+Torque converter
Check line pressure at idle with selector
lever in ªDº position. Refer to ªLine Pressure
Testº, AT-1044.
OK NG
1. Remove control valve assembly.
Refer to AT-1124.
2. Check the following items:
+Valves to control line pressure
(Pressure regulator valve, pressure
modifier valve, pilot valve and pilot
filter)
+Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
+Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNGVA
Check again.
OK
cNG
1. Perform TCM input/
output signal inspec-
tion.
2. If NG, recheck TCM
pin terminals for
damage or loose
connection with har-
ness connector.
INSPECTION END
SAT638A
SAT493G
SAT494G
SAT171B
..
.
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1104

11. Vehicle Cannot Be Started From D1
SYMPTOM:
Vehicle cannot be started from D1on Cruise test Ð Part 1.
Is 9. Vehicle Does Not Creep Backward
In ªRº Position OK?
Yes
cNo
Go to 9. Vehicle Does Not
Creep Backward In ªRº
Position, AT-1103.
Does self-diagnosis show damage to
vehicle speed sensorzA/T (revolution
sensor), shift solenoid valve A, B or
vehicle speed sensorzMTR after cruise
test?
No
cYes
Check damaged circuit.
Refer to AT-1064, 1066,
1070 or 1072.
Check accelerator position sensor. Refer
to EC section [TROUBLE DIAGNOSIS
FOR ªTHROTTLE (ACCEL) POSI SENº
(DTC 43)].
OK
cNG
Repair or replace throttle
position sensor.
Check line pressure at stall point with
selector lever in ªDº position. Refer to
ªLine Pressure Testº, AT-1044.
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Shift valve A
+Shift valve B
+Shift solenoid valve A
+Shift solenoid valve B
+Pilot valve
+Pilot filter
3. Disassemble A/T.
4. Check the following
items:
+Forward clutch assem-
bly
+Forward one-way clutch
+Low one-way clutch
+High clutch assembly
+Torque converter
+Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNG
1. Remove control valve assembly. Refer
to AT-1124.
2. Check the following items:
+Shift valve A
+Shift valve B
+Shift solenoid valve A
+Shift solenoid valve B
+Pilot valve
+Pilot filter
OK
OKb
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT832H
SAT222JA
SAT494G
SAT171B
.
.
.
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1105

12. A/T Does Not Shift: D1®D2Or Does Not
Kickdown: D
4®D2
SYMPTOM:
A/T does not shift from D1to D2at the specified speed.
A/T does not shift from D
4to D2when depressing accelera-
tor pedal fully at the specified speed.
Are 10. Vehicle Does Not Creep Forward
In ªDº, ª2º Or ª1º Position and 11. Vehicle
Cannot Be Started From D
1OK?
Yes
cNo
Go to 10. Vehicle Does
Not Creep Forward In ªDº,
ª2º Or ª1º Position and 11.
Vehicle Cannot Be Started
From D
1, AT-1104, 1105.
Does ªTCM INPUT SIGNALSº in
Data Monitor show damage to
PNP switch circuit?
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
Does self-diagnosis show damage
to PNP switch circuit?
No
cYes
Check PNP switch. Refer
to AT-1091.
Check vehicle speed sensorzA/T (revolu-
tion sensor) and vehicle speed
sensorzMTR. Refer to AT-1064, 1066.
OK
cNG
Repair or replace vehicle
speed sensorzA/T (revolu-
tion sensor) and vehicle
speed sensorzMTR. Refer
to AT-1064, 1066.
Check accelerator position sensor. Refer
to EC section [TROUBLE DIAGNOSIS
FOR ªTHROTTLE (ACCEL) POSI SENº
(DTC 43)].
OK
cNG
Repair or replace throttle
position sensor.
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNG
1. Remove control valve.
Refer to AT-1124.
2. Check the following
items:
+Shift valve A
+Shift solenoid valve A
+Pilot valve
+Pilot filter
3. Disassemble A/T.
4. Check the following
items:
+Servo piston assembly
+Brake band
+Oil pump assembly
1. Remove control valve. Refer to
AT-1124.
2. Check the following items:
+Shift valve A
+Shift solenoid valve A
+Pilot valve
+Pilot filter
OK
OK
b
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT146BA
SAT222JA
SAT171B
.
.
.
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1106

13. A/T Does Not Shift: D2®D3
SYMPTOM:
A/T does not shift from D2to D3at the specified speed.
Are 10. Vehicle Does Not Creep Forward
In ªDº, ª2º Or ª1º Position and 11. Vehicle
Cannot Be Started From D
1OK?
Yes
cNo
Go to 10. Vehicle Does
Not Creep Forward In ªDº,
ª2º Or ª1º Position and 11.
Vehicle Cannot Be Started
From D
1, AT-1104, 1105.
Does ªTCM INPUT SIGNALSº in
Data Monitor show damage to
PNP switch circuit?
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
Does self-diagnosis show damage
to PNP switch circuit?
No
cYes
Check PNP switch. Refer
to AT-1091.
Check accelerator position sensor. Refer
to EC section [TROUBLE DIAGNOSIS
FOR ªTHROTTLE (ACCEL) POSI SENº
(DTC 43)].
OK
cNG
Repair or replace throttle
position sensor.
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Shift valve B
+Shift solenoid valve B
+Pilot valve
+Pilot filter
3. Disassemble A/T.
4. Check the following
items:
+Servo piston assembly
+High clutch assembly
+Oil pump assembly
1. Remove control valve assembly. Refer
to AT-1124.
2. Check the following items:
+Shift valve B
+Shift solenoid valve B
+Pilot valve
+Pilot filter
OK
OK
b
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT146BA
SAT222JA
SAT171B
.
.
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1107

14. A/T Does Not Shift: D3®D4
SYMPTOM:
+A/T does not shift from D3to D4at the specified speed.
+A/T must be warm before D
3to D4shift will occur.
Are 10. Vehicle Does Not Creep Forward
In ªDº, ª2º Or ª1º Position and 11. Vehicle
Cannot Be Started From D
1OK?
Yes
cNo
Go to 10. Vehicle Does
Not Creep Forward In ªDº,
ª2º Or ª1º Position and 11.
Vehicle Cannot Be Started
From D
1, AT-1104, 1105.
Does self-diagnosis, after cruise
test, show damage to any of the
following circuits?
+PNP switch
+Overdrive control switch
+A/T fluid temperature sensor
+Vehicle speed sensorzA/T
(Revolution sensor)
+Shift solenoid valve A or B
+Vehicle speed sensorzMTR
No
cYes
Check damaged circuit.
Refer to AT-1064, 1066,
1070, 1072 or 1091.
Check accelerator position sensor. Refer
to EC section [TROUBLE DIAGNOSIS
FOR ªTHROTTLE (ACCEL) POSI SENº
(DTC 43)].
OK
cNG
Repair or replace throttle
position sensor.
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Shift valve B
+Overrun clutch control
valve
+Shift solenoid valve B
+Pilot valve
+Pilot filter
3. Disassemble A/T.
4. Check the following
items:
+Servo piston assembly
+Brake band
+Torque converter
+Oil pump assembly
1. Remove control valve assembly. Refer
to AT-1124.
2. Check the following items:
+Shift valve B
+Overrun clutch control valve
+Shift solenoid valve B
+Pilot valve
+Pilot filter
OK
OK
b
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT833HA
SAT222JA
SAT171B
.
.
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1108

15. A/T Does Not Perform Lock-up
SYMPTOM:
A/T does not perform lock-up at the specified speed.
Does self-diagnosis show damage to
torque converter clutch solenoid valve
after cruise test?
No
cYes
Check torque converter
clutch solenoid valve.
Refer to AT-1076.
Check accelerator position sensor. Refer
to EC section [TROUBLE DIAGNOSIS
FOR ªTHROTTLE (ACCEL) POSI SENº
(DTC 43)].
OK
cNG
Repair or replace throttle
position sensor.
1. Remove control valve. Refer to
AT-1124.
2. Check following items:
+Torque converter clutch control valve
+Torque converter relief valve
+Torque converter clutch solenoid valve
+Pilot valve
+Pilot filter
OK
cNG
Repair or replace dam-
aged parts.
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT844H
SAT222JA
.
.
. .
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1109

16. A/T Does Not Hold Lock-up Condition
SYMPTOM:
A/T does not hold lock-up condition for more than 30 sec-
onds.
Does self-diagnosis show damage to
engine speed signal circuit after cruise
test?
No
cYes
Check engine speed sig-
nal. Refer to AT-1082.
1. Remove oil pan.
2. Check A/T fluid condition.
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Torque converter clutch
control valve
+Pilot valve
+Pilot filter
3. Disassemble A/T.
4. Check torque converter
and oil pump assembly.
1. Remove control valve assembly. Refer
to AT-1124.
2. Check the following items:
+Torque converter clutch control valve
+Pilot valve
+Pilot filter
OKOKb
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
17. Lock-up Is Not Released
SYMPTOM:
Lock-up is not released when accelerator pedal is released.
Does ªTCM INPUT SIGNALSº in
Data Monitor show damage to
closed throttle position switch cir-
cuit?
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
Does self-diagnosis show damage
to closed throttle position switch
circuit?
No
cYes
Check closed throttle posi-
tion switch. Refer to
AT-1091.
Check again.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT835H
SAT171B
SAT146BA
.
.
. .
.
.
.
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-1110