ignition NISSAN 300ZX 1984 Z31 Automatic Transmission Workshop Manual

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

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