Infiniti QX4 (R50). Manual — part 322
INSPECTION/ENGINE REVOLUTION SIGNAL
NBEL0201S05
1
CHECK ECM OUTPUT
1. Start engine.
2. Check voltage between combination meter terminals 16 and ground at idle and 2,000 rpm.
SEL364WB
OK or NG
OK
©
Engine revolution signal is OK.
NG
©
Harness for open or short between ECM and combination meter
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-105
INSPECTION/FUEL LEVEL SENSOR UNIT
=NBEL0201S06
1
CHECK GROUND CIRCUIT FOR FUEL LEVEL SENSOR UNIT
Check harness continuity between fuel level sensor unit terminal 2 and ground.
SEL299X
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-108).
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 terminal 17 and fuel level sensor unit terminal 3.
3. Check continuity between combination meter terminal 17 and ground.
SEL300X
OK or NG
OK
©
Fuel level sensor unit is OK.
NG
©
Repair harness or connector.
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-106
INSPECTION/THERMAL TRANSMITTER
=NBEL0201S07
1
CHECK THERMAL TRANSMITTER
Refer to “THERMAL TRANSMITTER CHECK” (EL-108).
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 terminal 18 and thermal transmitter terminal 1.
Continuity should exist.
3. Check continuity between combination meter terminal 18 and ground.
Continuity should not exist.
SEL184WA
OK or NG
OK
©
Thermal transmitter is OK.
NG
©
Repair harness or connector.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-107
Electrical Components Inspection
=NBEL0202
METER/GAUGE RESISTANCE CHECK
NBEL0202S01
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
SEL352X
YEL066K
FUEL LEVEL SENSOR UNIT CHECK
NBEL0202S02
I
For removal, refer to FE-4, “FUEL SYSTEM”.
Check the resistance between terminals 3 and 2.
Ohmmeter
Float position
mm (in)
Resistance
value
Ω
(+)
(−)
3
2
*1
Full
95 (3.74)
Approx. 4 - 6
*2
1/2
184 (7.24)
31 - 34
*3
Empty
265 (10.43)
80 - 83
*1 and *3: When float rod is in contact with stopper.
MEL424F
THERMAL TRANSMITTER CHECK
NBEL0202S03
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
EL-108
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