Dash NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

TIME CONTROL SYSTEM
Volwnetei terminals
- Preparation for Trouble-shooting -
1 Remove R H dash side cover and remove
blower motor
2 Remove time control unit with harness con-
nected
3 Connect main harness to instrument harness (if
disconnected)
Check from harness ride
Ignition switch pOIitiOn
harness connection SE L750D
I+)
-Power Supply Cercuit Check-
1-1 OFF ACC ON
@
@ 1 @ j ov 1 ov I Approx 17v
ov Approx Approx 12v 12v 0
Contlnult"
- Trou ble-shooting
intermittent wiper does not operate
4
I Go to "Power Supply Circuit Check"
OK NG
Check harness for T C U
power supply circuit
v
Check wiper relay circuit
OK NG
I Check wiDer relav I I
I
I 10 K ~NG
Check harness between Replace
T C U and wiper relay
Check wiper switch circuit check wiper relay
1 OK
I
Replace T C U Check wiper switch
Check harness between T C U Replace
and wiper switch
b
wiper switch
v
WIPER RELAY CIRCUIT CHECK
1 Turn wiper switch to "INT"
2 Turn ignition switch to "ACC"
3 Measure voltage across and 0
Check from harness ride
fTl7rFl
Wiper switch INT 0-12v lgnmon switch ACC
Needle shakes from 0 to 12V every 2 to 15 seconds
SEL708D
Voltmeter u
WIPER SWITCH CIRCUIT CHECK
1 Turn wiper switch to "INT"
2. Turn ignitionswitch to "OFF".
3 Check continuity between @ and @
Check from harness ride
Wiper switch INT
Ignition switch OFF
Ohmmeter
SEL709D
EL-83