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Home >> Acura >> 2004 >> MDX Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System >> General Troubleshooting Information >> Displaying Sensor Input At The Climate Control Unit >> To run the sensor input display mode, follow these steps
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To run the sensor input display mode, follow these steps

  1. Turn the ignition switch OFF.
  2. Press and hold both the AUTO and REC buttons, then start the engine.
  3. After the engine starts, release the buttons. The climate control display will flash the sensor number and then the value for that sensor. Record the value displayed.
  4. To advance to the next sensor, press the rear window defogger button.
    SENSOR INPUT DISPLAY MODE

    Sensor Item Displayed Value
    1 In-car Temperature Sensor °C
    2 Ambient Temperature °C
    3 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 kcal/m2 .h
    4 Engine Coolant Temperature °C
    5 Evaporator Outlet Air Temperature °C
    6 Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution.) % of opening
    7 Vent Temperature Air Out (TAO) °C
    8 Vehicle Speed (Vehicle must be driven to display speed) km/h
    NOTE:
    • The sensor values will be displayed in degrees Celsius (°C) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (°F).
    • If the sensor value displays "Er" this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS (see GENERAL TROUBLESHOOTING INFORMATION ) or refer to checking DTCs by DTC indication to check for DTCs .
    • If necessary, compare the sensor input display to an alike, known-good vehicle under the same test conditions.
    • If the sensor is out of the normal range, refer to the sensor test, or substitute the sensor with a known-good, and recheck.
  5. To cancel the sensor input display mode, press the AUTO button, or turn the ignition off.
CELSIUS TO FAHRENHEIT CONVERSION

°C °F °C °F °C °F °C °F °C °F
0 32 10 50 20 68 30 86 40 104
1 34 11 52 21 70 31 88 41 106
2 36 12 54 22 72 32 90 42 108
3 37 13 55 23 73 33 91 43 109
4 39 14 57 24 75 34 93 44 111
5 41 15 59 25 77 35 95 45 113
6 43 16 61 26 79 36 97 46 115
7 45 17 63 27 81 37 99 47 117
8 46 18 64 28 82 38 100 48 118
9 48 19 66 29 84 39 102 49 120
CELSIUS TO FAHRENHEIT CONVERSION

°C °F °C °F °C °F °C °F °C °F
50 122 60 140 70 158 80 176 90 194
51 124 61 142 71 160 81 178 91 196
52 126 62 144 72 162 82 180 92 198
53 127 63 145 73 163 83 181 93 199
54 128 64 147 74 165 84 183 94 201
55 131 65 149 75 167 85 185 95 203
56 133 66 151 76 169 86 187 96 205
57 135 67 152 77 170 87 188 97 207
58 136 68 154 78 172 88 190 98 208
59 139 69 158 79 174 89 192 99 210
ALPHANUMERIC CONVERSION

Display Reading (Alphanumeric) °C °F %
A1 thru A9 -1 thru-9 30 thru 16 - 1 thru -9
B0 thru E9 -10 thru-19 14 thru-2 -10 thru-19
C0 thru C9 -20 thru-29 -4 thru -20 -20 thru -29
D0 thru D9 -30 thru -39 -22 thru -38 -30 thru -39
E0 thru E9 -40 thru -49 -40 thru-58 --
F0 thru F9 -50 thru -59 -58 thru -74 + 100 thru+109
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