1984 NISSAN 300ZX lock

TROUBLE-SHOOTING AND DIAGNOSES
Trouble-shooting Chart
Numbers are arranged in order of probability
Perform
inspections starting with number one and working up Circled numberr indicate that
the rransmirrion must be removed from the
vehicle
D 2 and 1 rangal Clutch 11soi
..... @
@ LOCkUDdoan~c~scurin'4m war IL4N7181
Lock UP d- not -ur many ""IC IE4N7181
... 1. ..
0 . ... 2 3 Large bolt changinp from lock up "OFF 10 ON
AT-70

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 Parts Related to A. S. C. D. (Cont’d)
INSPECTION POINTS
Inspection No
1
2
3
4
5
6
7
8
Item to be checked
0 D cancel solenoid signals
A S C D cruise signals
AS C D wiring harness
AS C D controller
AS C D 0 D cut signals
AS C D wiring harness
Output signal wiring
0.D cancel solenoid
Checking method
Jack up rear wheels, set lever to D range, and accelerate up to
D4 speed by slightly opening throttle
Then, when vehicle
speed
is 30 to 80 kmlh (19 to 50 MPH), completely close
accelerator and apply brakes over
0 7 second To check if
signals to turn on 0 D cancel solenoid come out at this time,
check item
“0 D cancel solenoid” in chart on page AT-75
1 Connect tester to connector terminals, Nos 13 and 22,
of lock-up control unit
2 Measure by repeatedly releasing vehicle speed setting
during A S C D driving
Proper indication
ASCD isset 12V
AS C
D is released OV
Refer to section EL for A S C D
Refer to section EL for AS C D
1 Connect tester to connector terminals, Nos 15 and 22,
of lock-up control
unit
2 Measure by repeatedly releasing vehicle speed setting
during AS C
D driving in D4 speed
Proper indication
Accelerator pedal is depressed OV
Accelerator pedal
is released 5V
Refer to section ELfor A S C D
Check connector between control unit and 0 D cancel
solenoid for connections and continuity
Apply 12V voltage to solenoid proper to see if it operates
normally
AT-88

TROUBLE-SHOOTING AND DIAGNOSES
Inspection of Kickdown Control
I Running test I
signals normal? signals normal? wiring normal?
Replace contrul
(I nspection-3)
good condition?
Repair harness
switch
I
Repair wires
(Inspection-5)
Check if downshift
solenoid functions
properly
Replace
in A/T I I
INSPECTION PO I NTS ~~
~
Inspection No Item to be checked Checking method
Listen for a “click“to be emitted by downshift solenoid
when accelerator pedal
is fully depressed and ignition switch
is “ON“
Downshift solenoid signals
I 1 Connect tester to connector terminals, Nus 21 and 22, of lock-
up control unit Measure while operating accelerator pedal
I Full-open accelerator OV 2 I Kickdown switch signals
Less than full open 5V
Check connector between kickdown switch and control unit
for moper connection and continuitv 3 1 Wires for kickdown switch
4 I Input signal wiring Check connector between downshift solenoid and control
unit for proper connection and continuity
Apply 12V voltage to solenoid proper to see if it functions
normally Downshift solenoid 5
AT-89

TROUBLE-SHOOTING AND DIAGNOSES
2
Troubles Detected by Self-diagnosing and Their Indication
Throttle sensor
I I
switch is turned on to 2nd speed
switch and lock-up control
unit harness.
faster than 2nd speed
0 Vehicle speed sensor defective
@ Harness is broken between
(Inspection-1)
vehicle speed sensor and
lock-up control unit
+
@ Throttle sensor defective
(Inspection.2)
@ Harness is broken between
throttle sensor and lock-up
control unit
@ Lock-up control unit malfunc-
tions
INSPECTION POINTS
Checking method No of
inspection Checking item
Vehicle speed sensor
1 Connect tester to connector terminals, Nos 11 and 22, of lock-
up control unit.
2 Check voltage variation by running vehicle over 1
m (3 ftl at
very slow speed
Proper indication
Voltage must vary from OV to over 5V
1
1 Connect tester to connector terminals. Nos 4 and 22, of lock-
up control unit
2 Measure voltage while operating accelerator pedal
Proper indication
Accelerator pedal in fullclose throttle position OV
Accelerator pedal in full-open throttle position 4V
AT-90