center console NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

METER AND GAUGES -Digital Type Combination Gauge
Trouble-shooting
(+)
v
Check power supply circuit for combination
gauge
(-1
l°K 1 NG
Replace combination gauge Check harness
Voltmeter terminal I Ignition switch position
Approx Approx
@ I 03 I OV I 12v ! 12v
Continuity exists @ I gK:d I
Remove radio and A/C control assembly from
center console and remove combination gauge
with harness connected
Check from harness rtde
SEL681D
Display illumination will not darken when light
1 switch is "ON"
I Check light switch circuit for combination gauge I
1 Remove radio and A/C control assembly
and remove combination gauge with har-
ness connected.
Turn ignition switch to
"OFF"
Turn light switch to "ON"
Measure voltage across @ and @
2
3
4
Ignition switch - 0
ht switch - ON
SEL682D L
EL-59

METER AND GAUGES -Digital Type Combination Gauge
Trouble-shooting (Cont'd)
v
IGo to "Direction Sensor Amplifier Output Check" I
1 NG v
Check for loose harness
connector to
amplifier
Check for loose harness
connector to combmatlon
Replace combinatlon gauge Replace amplifier
I
1 Remove radio and AIC control assembly
from center console Remove combi-
nation gauge with harness connected
2. Turn ignition switch to "ON"
3 Check to determine if voltage IS produced
across
0 and @
SELSBSD
ACCELERATION & MILEAGE METERS
deceleration
Does speedometer operate?
1 No
Check harness between
combination gauge and
speed sensor Replace speed sensor
lNG
Replace combination gauge
Mileage meter registers "0" or abnormal value
I
Does speedometer operate?
Replace speed sensor
Check fuel injection pulse circuit for combination
gauge
I NG v
Check harness between
Replace combination
gauge combination gauge and
E F I control unit
IOK
EL-62

METER AND GAUGES -Digital Type Combination Gauge
@@6
100
100
100
100
010
010
010
010
001
001
001
001
000
000
000
000
- Direction Sensor Amplifier -
Output Check
Connect direction sensor amplifier harness (if
disconnected)
Using a directional magnet, determine the
direction in which car faces. Check voltage
across terminals
as indicated in chart below
Turn ignition switch to
"ON"
- Compass input Check
Remove radio and A/C control assembly from
center console and remove combination gauge
with harness connected
Check voltages across terminals
as indicated in
chart below
Turn ignition switch ON
Ch
SEL6870
Voltmeter (-1
terminal (+)
NW
NNW
N
NNE
NE
ENE
E
ESE
SE
SSE
S
ssw
sw
wsw
W
WNW
1 Morethan4V
0 Lessthan 1V
I -
@ -
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1 -
-
8 -
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0 -
-
@ -
1
0
1
1
1
1
0
1
1
0
1
1
1
1
0
1 -
-
-
1
1
0
1
1
0
1
1
1
1
0
1
1
0
1
1
-
-
0 -
1
1
1
0
0
1
1
1
1
1
1
0
0
1
1
1 -
CAUTION:
Before performing voltage measurements, ensure
that there IS no equipment or facility which would
produce powerful magnet lines
in the vicinity of
vehicle.
N
NNW? I rNNE
WNW ENE
. ,
w4w Ek-E
SEL688D
EL-63