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TROUBLESHOOTING
51) Check for Readings of the Outside Air Temperature Sensor
52) Check for Readings of the Engine Exhaust Air Temperature Sensor
[ Unit with deodorant kit only ]
1. Select "Outside air temperature (code No. 4d)" in the monitor
mode of the board maintenance functions to check outside air
temperature.
2. Measure actual temperature with a thermometer, and check
for the sensor reading's extreme deviation from the actual
temperature.
3. Measure the resistance value of the outside air temperature
sensor at CN6[9]-[10] on the main PCB, and check for extreme
deviation from the standard value.
Temperature Standard resistance value
-4 ℉ (-20 ℃ ) 39.6 kΩ
14 ℉ (-10 ℃ ) 24.0 kΩ
32 ℉ (0 ℃ ) 15.0 kΩ
50 ℉ (10 ℃ ) 9.6 kΩ
68 ℉ (20 ℃ ) 6.4 kΩ
86 ℉ (30 ℃ ) 4.2 kΩ
104 ℉ (40 ℃ ) 3.0 kΩ
1. Check engine exhaust air temperature by selecting
"Engine exhaust air temperature (code No. 53)" in
the monitor mode of the board maintenance func-
tions.
2. Measure actual temperature with a thermometer,
and check for the sensor reading's extreme deviation
from the actual temperature.
3. Measure the resistance value of the engine exhaust
air temperature sensor at CN6[7]-[8] on the main
PCB, and check for extreme deviation from the
standard value.
Temperature Standard resistance value
572 ℉ (300 ℃ ) 52.6 kΩ
752 ℉ (400 ℃ ) 11.5 kΩ
842 ℉ (450 ℃ ) 6.1 kΩ
932 ℉ (500 ℃ ) 3.5 kΩ
1,112 ℉ (600 ℃ ) 1.4 kΩ
1,202 ℉ (650 ℃ ) 0.9 kΩ
1,292 ℉ (700 ℃ ) 0.6 kΩ
1,382 ℉ (750 ℃ ) 0.5 kΩ
1,472 ℉ (800 ℃ ) 0.3 kΩ
1,652 ℉ (900 ℃ ) 0.2 kΩ
[ 8 TON ] [ 15 TON ]
Engine exhaust air temperature sensor
Engine exhaust air temperature sensor
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