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Trouble Diagnoses
NAEL0306
PRELIMINARY CHECK FOR THERMOMETER
NAEL0306S01
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
NAEL0306S02
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 signal 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 signal 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-134
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