Nissan Silvia. Instruction — part 195
INSPECTION/FUEL LEVEL SENSOR UNIT
=NMEL0046S08
1
CHECK GROUND CIRCUIT FOR FUEL LEVEL SENSOR UNIT
1. Disconnect fuel level sensor unit harness connector.
2. Check harness continuity between fuel level sensor unit harness connector T9 terminal 4 (B) and ground.
SEL228Y
OK or NG
OK
©
GO TO 2.
NG
©
Repair harness or connector.
2
CHECK FUEL LEVEL SENSOR UNIT
Refer to “FUEL LEVEL SENSOR UNIT CHECK” (EL-71).
OK or NG
OK
©
GO TO 3.
NG
©
Replace fuel level sensor unit.
3
CHECK HARNESS FOR OPEN OR SHORT
1. Disconnect combination meter connector and fuel level sensor unit connector.
2. Check continuity between combination meter harness connector M18 terminal 17 (W/B) and fuel level sensor unit har-
ness connector T9 terminal 2 (W/B).
Continuity should exist.
3. Check continuity between combination meter harness connector M18 terminal 17 (W/B) and ground.
Continuity should not exist.
SEL229Y
OK or NG
OK
©
Fuel level sensor unit is OK.
NG
©
Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-69
INSPECTION/THERMAL TRANSMITTER
=NMEL0046S09
1
CHECK THERMAL TRANSMITTER
Refer to “THERMAL TRANSMITTER CHECK” (EL-72).
OK or NG
OK
©
GO TO 2.
NG
©
Replace.
2
CHECK HARNESS FOR OPEN OR SHORT
1. Disconnect combination meter connector and thermal transmitter connector.
2. Check continuity between combination meter harness connector M18 terminal 18 (L/W) and thermal transmitter harness
connector F117 terminal 1 (L/W).
Continuity should exist.
3. Check continuity between combination meter harness connector M18 terminal 18 (L/W) and ground.
Continuity should not exist.
SEL230Y
OK or NG
OK
©
Thermal transmitter is OK.
NG
©
Repair harness or connector.
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-70
FEL266Y
Electrical Components Inspection
=NMEL0047
METER/GAUGE RESISTANCE CHECK
NMEL0047S04
Check resistance between installation screws of meter/gauge.
Screws
Resistance
Ω
Tacho/Speedometer
Fuel/Temp. gauge
A - C
A - C
Approx. 190 - Approx. 260
B - D
B - C
Approx. 230 - Approx. 310
CEL313A
FUEL LEVEL SENSOR UNIT CHECK
NMEL0047S01
I
For removal, refer to FE-8, “FUEL SYSTEM”.
Sending Unit
NMEL0047S0101
Check the resistance between terminals 2 and 4.
Ohmmeter
Float position
mm (in)
Resistance
value
Ω
(+)
(−)
2
4
*1
Full
361 (14.21)
Approx. 4 - 6
*2
1/2
249 (9.80)
30 - 36
*3
Empty
46 (1.81)
80 - 93
*1 and *3: When float is in contact with stopper.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Electrical Components Inspection
EL-71
Lead Switch
=NMEL0047S0102
CEL314A
Lead switch is built into the fuel tank.
Check the continuity between terminals 5 and 6 or 5 and 7.
Terminals
Lead switch condition
Fuel level line
Fuel capacity
(Approximate values)
(Imp qt)
SW1
SW2
5-6 and 5-7
ON
ON
Above a
More than 6.8 (6)
5-6
OFF
ON
a - b
2.5 - 6.8 (2-1/4-6)
No continuity
OFF
OFF
Below b
Less than 2.5 (2-1/4)
MEL424F
THERMAL TRANSMITTER CHECK
NMEL0047S02
Check the resistance between the terminals of thermal transmitter
and body ground.
Water temperature
Resistance
60°C (140°F)
Approx. 170 - 210
Ω
100°C (212°F)
Approx. 47 - 53
Ω
METERS AND GAUGES
Electrical Components Inspection (Cont’d)
EL-72
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