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Home >> Honda >> 2012 >> Insight Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control >> General Troubleshooting Information >> Run the Sensor Input Display Mode
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Run the Sensor Input Display Mode

  1. Turn the ignition switch to LOCK (0).
  2. Press and hold both the AUTO and RECIRCULATION buttons, then start the engine.
  3. After the engine starts, release both buttons. The display panel control unit 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/MIRROR HEATER button.
    NOTE:
    • The mode positioning will be displayed by BIT. Check the mode motor positioning by using the mode motor code information.
    • 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, or refer to checking DTCs by DTC indication to check for DTCs.
    • If necessary, compare the sensor input display to a like, known-good vehicle under the same test conditions.
    • If the sensor displayed value is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.
    • Target vent temperature air out (TAO) is the value calculated by the climate control unit. It is determined by the conditions of the TEMP DIAL position, the outside air temperature, the in-car temperature, and the solar radiation.
    Sensor Item Displayed Value
    1 Mode positioning BIT
    2 In-car temperature °C
    3 Outside air temperature °C
    4 Solar radiation sensor value: dark = 00, flashlight = 04, cloudy =10, sunny = 65 10kcal/m2 -h
    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 Vehicle speed (vehicle must be driven to display speed) 10 km/h
    8 Engine coolant temperature °C
    9 Target vent temperature air out (TAO) °C
    A Humidity sensor value %
    b Illumination duty Step
    C Software version --
    CELSIUS TO FAHRENHEIT CONVERSION TABLE

    °C °F
    0 32
    1 34
    2 36
    3 37
    4 39
    5 41
    6 43
    7 45
    8 46
    9 48
    10 50
    11 52
    12 54
    13 55
    14 57
    15 59
    16 61
    17 63
    18 64
    19 66
    20 68
    21 70
    22 72
    23 73
    24 75
    25 77
    26 79
    27 81
    28 82
    29 84
    30 86
    31 88
    32 90
    33 91
    34 93
    35 95
    36 97
    37 99
    38 100
    39 102
    40 104
    41 106
    42 108
    43 109
    44 111
    45 113
    46 115
    47 117
    48 118
    49 120
    50 122
    51 124
    52 126
    53 127
    54 128
    55 131
    56 133
    57 135
    58 136
    59 139
    60 140
    61 142
    62 144
    63 145
    64 147
    65 149
    66 151
    67 152
    68 154
    69 158
    70 158
    71 160
    72 162
    73 163
    74 165
    75 167
    76 169
    77 170
    78 172
    79 174
    80 176
    81 178
    82 180
    83 181
    84 183
    85 185
    86 187
    87 188
    88 190
    89 192
    90 194
    91 196
    92 198
    93 199
    94 201
    95 203
    96 205
    97 207
    98 208
    99 210
    ALPHANUMERIC CONVERSION TABLE

    Display Reading (Alphanumeric) °C °F %
    A1 thru A9 -1 thru -9 30 thru 16 -1 thru -9
    B0 thru B9 -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 -56 -40 thru -49
    F0 thru F9 -- -- + 100 thru +109

    Mode Motor Code Information 

    Code information on the mode motor is displayed by combining regulated segments.

    Fig 1: Identifying Mode Motor Codes
    G08094281Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Mode motor code signal 0: Open, 1: Short (GND) Mode position
    Mode 1 Mode 2 Mode 3 Mode 4
    1 0 0 0 OVER VENT
    1 0 0 1 VENT
    0 0 0 1 VENT-HEAT/VENT
    0 0 1 1 HEAT/VENT
    0 0 1 0 HEAT/VENT-HEAT
    0 1 1 0 HEAT
    0 1 0 0 HEAT-HEAT/DEF
    1 1 0 0 HEAT-DEF
    1 1 1 0 HEAT/DEF-DEF
    1 0 1 0 DEF
    1 0 1 1 OVER DEF
  5. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch to LOCK (0).
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