Infiniti QX4 (R50). Manual — part 323
MEL005H
VEHICLE SPEED SENSOR SIGNAL CHECK
NBEL0202S04
1.
Remove vehicle speed sensor from transmission.
2.
Turn vehicle speed sensor pinion quickly and measure voltage
across a and b.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Electrical Components Inspection (Cont’d)
EL-109
System Description
NBEL0153
SEL713U
This unit displays following items:
I
Earth magnetism and heading direction of vehicle.
I
Outside air temperature.
I
Caution for frozen road surfaces.
OUTSIDE TEMPERATURE DISPLAY
NBEL0153S01
Push the switch when the ignition key is in the “ACC” or “ON” position. The outside temperature will be dis-
played in “°F”.
I
Selecting the indication range
Push the switch to change from “°F” to “°C”.
I
When the outside temperature drops below freezing point, ICE is displayed on the unit.
I
When the outside temperature is between 55°C (130°F) and 70°C (158°F), the display shows 55°C
(130°F).
I
When the outside temperature is lower than −30°C (−20°F) or higher than 70°C (158°F), the display shows
only “---” though it is operating. This is not a problem.
I
The indicated temperature on the thermometer is not readily affected by engine heat. It changes only when
one of the following conditions is present.
a) The temperature detected by the ambient air temperature sensor is lower than the indicated temperature
on the thermometer.
b) The difference in temperature detected during a period of 40 seconds is less than 1°C (1.8°F) when vehicle
speed has been greater than 24 km/h (15 MPH) for more than 100 seconds.
(This is to prevent the indicated temperature from being affected by engine heat or cooling fan operation
during low-speed driving.)
c) The ignition key has been turned to the “OFF” position for more than 4 hours. (The engine is cold.)
DIRECTION DISPLAY
NBEL0153S02
Push the switch when the ignition key is in the “ACC” or “ON” position. The direction will be displayed.
COMPASS AND THERMOMETER
System Description
EL-110
Wiring Diagram — COMPAS —
NBEL0154
MEL803L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
COMPASS AND THERMOMETER
Wiring Diagram — COMPAS —
EL-111
Trouble Diagnoses
NBEL0048
PRELIMINARY CHECK FOR THERMOMETER
NBEL0048S02
1
COOL DOWN CHECK
1. Turn the ignition key switch to the “ACC” position.
2. Cool down the ambient air temperature sensor with water or ice, so that the indicated temperature falls.
Does the indicated temperature fall?
Yes
©
GO TO 2.
No
©
The system is malfunctioning. Check the system following “INSPECTION/COMPASS
AND THERMOMETER”.
2
WARM UP CHECK
1. Leave the vehicle for 10 minutes, so that the indicated temperature rises.
2. With the ignition key in the “ACC” position, disconnect and reconnect the ambient air temperature sensor connector.
Does the indicated temperature rise?
Yes
©
The system is OK.
No
©
The system is malfunctioning. Check the system following “INSPECTION/COMPASS
AND THERMOMETER”.
NOTE:
I
When the outside temperature is between 55°C (130°F) and 70°C (158°F), the display shows 55°C
(130°F). When the outside temperature is lower than −30°C (−20°F) or higher than 70°C (158°F), the dis-
play shows only “---”.
I
The indicated temperature on the thermometer is not readily affected by engine heat. It changes only when
one of the following conditions is present.
a) The temperature detected by the ambient air temperature sensor is lower than the indicated temperature
on the thermometer.
b) The difference in temperature detected during a period of 40 seconds is less than 1°C (1.8°F) when vehicle
speed has been greater than 24 km/h (15 MPH) for more than 100 seconds.
(This is to prevent the indicated temperature from being affected by engine heat or cooling fan operation
during low-speed driving.)
c) The ignition key has been turned to the “OFF” position for more than 4 hours. (The engine is cold.)
INSPECTION/COMPASS AND THERMOMETER
NBEL0048S01
Symptom
Possible causes
Repair order
No display at all
1. 10A fuse
2. Ground circuit
3. Compass and thermometer
1. Check 10A fuse [No. 9, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive
voltage is at terminal 7 of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indi-
cation slips off the
mark or incorrect.
1. In manual correction mode (Bar
and display vanish.)
2. Zone variation change is not done.
1. Drive the vehicle and turn at an angle of 90°.
2. Perform the zone variation change.
Compass reading
remains unchanged.
1. Vehicle speed sensor is not
entered.
2. Compass and thermometer
1. Check harness for open or short between combination meter
terminal 13 and compass and thermometer terminal 1.
2. Replace compass and thermometer.
Displays wrong tem-
perature when ambient
temperature is between
−30°C (−20°F) and
55°C (130°F). (See
NOTE above.)
1. Check operation
2. Ambient air temperature sensor
circuit
3. Vehicle speed sensor is not
entered.
4. Ambient air temperature sensor
5. Compass and thermometer
1. Perform preliminary check shown above.
2. Check harness for open or short between ambient air tem-
perature sensor and compass and thermometer.
3. Check harness for open or short between combination meter
terminal 13 and compass and thermometer terminal 1.
4. Replace ambient air temperature sensor.
5. Replace compass and thermometer.
COMPASS AND THERMOMETER
Trouble Diagnoses
EL-112
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