Infiniti QX4 (R50). Manual — part 321
Trouble Diagnoses
NBEL0201
PRELIMINARY CHECK
NBEL0201S01
SEL361W
*1: Meter/Gauge Operation and Odo/
Trip Meter Segment Check in
Diagnosis Mode (EL-100)
*2: METER/GAUGE RESISTANCE
CHECK (EL-108)
*3: POWER SUPPLY AND GROUND
CIRCUIT CHECK (EL-103)
*4: Symptom Chart 1 (EL-102)
*5: Symptom Chart 2 (EL-102)
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Trouble Diagnoses
EL-101
SYMPTOM CHART
NBEL0201S02
Symptom Chart 1 (Malfunction is Indicated in
Diagnosis Mode)
NBEL0201S0201
Symptom
Possible causes
Repair order
Odo/trip meter indicate(s)
malfunction in Diagnosis
mode.
Unified meter control unit
Replace unified meter control unit.
Multiple meter/gauge indi-
cate malfunction in Diagno-
sis mode.
One of speedometer/
tachometer/fuel gauge/
water temp. gauge indi-
cates malfunction in Diag-
nosis mode.
1. Meter/Gauge
2. Unified meter control unit
1. Check resistance of meter/gauge indicating malfunc-
tion. If the resistance is NG, replace the meter/
gauge. Refer to “METER/GAUGE RESISTANCE
CHECK”, EL-108.
2. If the resistance of meter/gauge is OK, replace uni-
fied meter control unit.
Symptom Chart 2 (No Malfunction is Indicated in
Diagnosis Mode)
NBEL0201S0202
Symptom
Possible causes
Repair order
One of speedometer/
tachometer/fuel gauge/
water temp. gauge is mal-
functioning.
1. Sensor signal
- Vehicle speed signal
- Engine revolution signal
- Fuel gauge
- Water temp. gauge
2. Unified meter control unit
1. Check the sensor for malfunctioning meter/gauge.
INSPECTION/VEHICLE SPEED SENSOR (Refer to
EL-104.)
INSPECTION/ENGINE REVOLUTION SIGNAL
(Refer to EL-105.)
INSPECTION/FUEL LEVEL SENSOR UNIT (Refer to
EL-106.)
INSPECTION/THERMAL TRANSMITTER (Refer to
EL-107.)
2. Replace unified meter control unit.
Multiple meter/gauge are
malfunctioning. (except
odo/trip meter)
Before starting trouble diagnoses below, perform PRELIMINARY
CHECK, EL-101.
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-102
SEL179WB
POWER SUPPLY AND GROUND CIRCUIT CHECK
=NBEL0201S03
Power Supply Circuit Check
NBEL0201S0301
Terminals
Ignition switch position
(+)
(−)
OFF
ACC
ON
62
Ground
Battery
voltage
Battery
voltage
Battery
voltage
66
Ground
0V
0V
Battery
voltage
If NG, check the following.
I
10A fuse [No. 12, located in fuse block (J/B)]
I
10A fuse [No. 30, located in fuse block (J/B)]
I
Harness for open or short between fuse and combination
meter
SEL180WA
Ground Circuit Check
NBEL0201S0302
Terminals
Continuity
59 - Ground
Yes
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-103
INSPECTION/VEHICLE SPEED SENSOR
=NBEL0201S04
1
CHECK VEHICLE SPEED SENSOR OUTPUT
1. Remove vehicle speed sensor from transmission.
2. Check voltage between combination meter terminals 15 and 63 while quickly turning speed sensor pinion.
SEL297X
OK or NG
OK
©
Vehicle speed sensor is OK.
NG
©
GO TO 2.
2
CHECK VEHICLE SPEED SENSOR
Check resistance between vehicle speed sensor terminals 1 and 2.
SEL298X
OK or NG
OK
©
Check harness or connector between speedometer and vehicle speed sensor.
NG
©
Replace vehicle speed sensor.
METERS AND GAUGES
Trouble Diagnoses (Cont’d)
EL-104
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