bulb NISSAN 300ZX 1984 Z31 Engine Fuel And Emission Control System Workshop Manual

SELF-DIAGNOSIS
Self-diagnostic Procedure
fully counterclockwise -,
SEF651B
Turn Ignition switch to "ON" Poslflon1
Check harness for battery
source (Refer to page
EF &
EC-59, 8) If battery is
0 K , replace control unit
unit stay "ON" (Bulb check)
Turn diagnosis mode selector fully clockwise
Write down the malfunction- unit are displaying code No. 23, No 24
(VG30ET) and No 31.
I
SEF653B
ing code
SEF654B
unit are displaying code No 31
OK
Start engine 41
Make sure that N G Write down the malfunction-
unit are displaying code No 14 (VG30ET)
and No. 31 ing code
OK1
EF & EC-37

INJECTOR COOLING FAN (VG30ET)
lnspectio
B. Fan motor timer unit
Check the timer unit with a battery source and
a bulb (12V-3W). following the procedure
below
,,-Fan motor timer unit
1 Connect terminal @ to negative terminal of
power source, terminal @to
test lamp terminal
and the other
test lamp terminal to negative
terminal of the power source
2. Connect terminal @ to positive terminal of
power source
Test lamp does not glow ..... OK
Test lamp glows ......... N.G
3 Connect terminal @ to positive terminal of
power source and disconnect it (Operate
timer)
4 Connect terminal @ to negative terminal of
power source
Test lamp glows ......... OK
Test lamp does not glow . N G.
5. Make sure that test lamp should remain on for
about 17 minutes after step 3 is performed,
and then go out.
6. While test lamp is on, connect terminal @to
positive terminal of power source.
Test lamp goes out .... OK.
Test lampdoesnotgoout . . NG
(Corrt'd)
C \Mater temperature switch
1 IRemove water temperature switch
SEF737B
2 Check water temperature switch for proper
operation
Operating temperature:
OFF + ON 80°C (176°F)
SEF738B
EF & EC-71