NISSAN 300ZX 1984 Z31 Automatic Transmission Manual PDF

TROUBLE-SHOOTING AND DIAGNOSES
Trouble-shooting Chart (Cont'd)
Numbers are arranged m order of probability Perform inspections starting with number one
and working up Circled numberr indicate that
the transmiwon must be removed from the
vehicle
AT-71

AT-72

TROUBLE-SHOOTING AND DIAGNOSES
E4N71B Electrical Systern/Schernatic
BATTERY
-
IGNITION SWITCH
@ Digilal type meter
0 Needle type meter
COMBINATION
-
SAT750
AT-73

D I
4
P
FUSE
Refer to POWER SUPPLY m EL section
:- I
ND
@ Digital type meter
@) Needle type meter (Needle type)
-I
c
CR r
m
G,
I
0
0
-I
z
R
D
z
U
U
5
R
z
0
v)
m
v)
8

TROUBLE-SHOOTING AND DIAGNOSES
inspection of Lock-up Control Unit
Terminal
No Checking inputloutput signal
Check voltage between No. 22 terminal (Ground)
and each terminal in the following table using
tester and Tool (Diagnostic
sub-harness)
Judgment standard Checking method
7 Main harness
I 5 1 Throttle sensor (ground) -
Lock-up control und LKV319K0010 lJ34270)
SAT163
- I
(Lock-up control unif harness ~onnecfor as seen from front)
Nate 1201 IS not used ~~
11
Lock-up control unit
7
Check
voltage variation while running
vehicle over
1 rn (3 tt) at very low speed
Voltage must vary from
OV to more than 5V Vehicle speed sensor
1 I Downshift solenoid Measure when depressing and releasing
accelerator pedal OV if turned on
12V if turned off
2 1 Lock-upsolenoid Measure while driving vehicle in "0"
I range
OV if turned on
12V
if turned off
3 I Throttle sensor (power source) I Connect tester to terminals 3 and 5 I 5V at all times
4 I Throttlesensor Measure while operating accelerator
I pedal
Full-close throttle 04V
Full-open throttle 4V
6 1 0 D cancel solenoid Measure while operating 0 D cancel
switch OV if turned on
12V if turned
off
Measure while depressing accelerator
pedal in
"Dr range with driving Power shift indicator lamp 7
Idle contact switch
Measure while operating accelerator
pedal
Full throttle contact switch
Measure with control lever set to "2"
range or other ranges 10 1 Inhibitor "2" range switch
OV if turned on
12V if turned
off
Full-close throttle 12V
Part-open throttle OV ~~
~~
Throttle opening
Over 1 I2 12v
Below
114 ov
12V if set to "2" range
OV
if set to other ranges
AT-75

TROUBLE-SHOOTING AND DIAGNOSES
Inspection of Lock-up Control Unit (Cont'd)
Terminal
No
12
13
14
15
16
17
18
19
20
21
22
___
Checking inputloutput signal
1-2 shift switch
AS C D cruise signal
- Brake switch
A S C 0 0 D cut signal
3-4 shift switch
2-3 shift switch
Power source
Power shift switch
Low-temperature sensor
Kickdown switch
Ground
Checking method
Jack 'JP rear wheels, set lever to D range,
and
ri easure while accelerating with a
slightly open throttle
Measure by repeatedly releasing vehicle
speed setting during
AS C D driving
Measure while operating brake pedal
Measure by turning on and off
accelerator switch during A S C D
driving at D4 speed
Jack up rear wheels, set lever to D range
range,
and measure while accelerating
with
a slightly open throttle
Make ground connection
Measure while operating power shift
switch
When checking in installed state, refer to
the items on the right Remove sensor
from transmission and make continuity
test
Measure while operating acceleratoi
pedal
Judgment standard
D1 range ov
D2. D3, and 04 ranges
12VifASCD
isset
OV if AS C D is released
5V
Braking condition 12v
Non-braking condition OV
OV if accelerator switch is on
5V
if accelerator switch is
off
D1, D2. and D3 ranges OV
D4 range 5v
D1 and D2 ranges
ov
D3 and D4 ranges 5v
12V
at all times
OV if turned on
12V
if turned off
Continuity test
Zero continuity at 20'c
(68OF) or higher
Continuity
at 10°C (50°F)
or lower
(Reference)
5V
if oil temp is over
20°C (68°F)
OV if oil temp
is below
10°C (5OOF)
Ful I-open accelerator OV
Less than
full open 5v
AT-76

TROUBLE-SHOOTING AND DIAGNOSES
Inspection of Lock.up Control
Details on each step will be
described later I Running tesl I
(Ins~ection-2) (Inspection-1 1 4 Is control unit connector
properly connected? OK / Check if wires for output Are lock-up signals normal’ ‘ signals are normal
(Inspection-3) I Insoection-4) I
Are wires for input Check if lock-up solenoid
operating normally
connection signals normal? IS Properly installed and
NG OK I
Are input signals
OK
Replace control unit
v
Repair or replace defective
or replace
I
I
AT-77

TROUBLE-SHOOTING AND DIAGNOSES
inspection of Lock-up Control (Cont'd)
INSPECTION POINTS
Inspection
No
1
2
3
4
5
Item to be checked
Lock-up signals
Wires for output signals
Lock-up solenoid
Wires for input signals
hut sianals
Checking method
e Connect tester to control unit connector terminals, Nos 2
and 22 and check lock-up signals while running vehicle
Proper indication
OV if lock-up solenoid is on
12V if lockup solenoid
is off
Check if connector between control unit and lock-up solenoid is
properly connected Also. check connector for continuity.
e Check if O-ring is installed to tip of solenoid
e Check operation of solenoid by applying 12V voltage
Check if connections are properly made between control unit
and following sensors Also. check connectors for conduction
Throttle sensor (Idle. high-throttle side)
e Inhibitor switch (2 range)
Shift switches (1-2.2-3 and 3-4)
Low-temperature sensor
e Kickdown switch
e Vehicle speed sensor
e 0 D switch
Check item given on inspection4 in flow chart on pages AT-75 and 76
AT-78

TROUBLE-SHOOTING AND DIAGNOSES
Inspection of O.D. Control
OK operates normally
Running test1
AIT is defective
(Case 0)
END OK
@ Check if 0 D is not released when power shift switch
@ Check if 0 D is not released in full throttle condition
is turned on
NG witch OK
N.G +
( Is power shift switch normal,) I ,
0. K
Check if 0 D cancel sole-
noid connector
is properly
connected and functions
normally
Replace solenoid
I
/Check if control unit connector
IS properly connected
Check
if connector is soaked
with water
I (Inspection-2)
NG OK
INSPECTION POINTS
Qlecking method Inspection
No Item to be checked
'I 0 D solenoid Turn on key and set 0 D switch to "0 D release" position to see
if 0 D solenoid clicks I I
Inspect following items given in flow chart on pages AT-75 and 76
Shift switches (1-2, 2-3 and 34)
Input signals 21
0 Vehicle speed sensor
0 Lowtemperature sensor
0 Full throttle contact switch
Kickdown switch
AT-79

TROUBLE-SHOOTING AND DIAGNOSES
Inspection of Downshift Control
Details on each step will be described later.
I Running test
Check if D4 - D3 downshift
control functions normally 0 K
brakes are applied over 0 7 second when running
at 30 to 80 kmlh (19 to 50 MPH) with full-close
throttle
(Inspection-1) 1.
N G 0 D cancel solenoid 0 K
signals normal7
(Inspection-4)
P I
signals normal?
(~nspection-3) 4
Repair wires Check if 0 D cancel sole-
noid
is properly installed
and functions normally.
NG OK
Repair defects
AT-80