Climate Control: Other Honda Odyssey III

Retrieving DTCs (without HDS)

The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following

Note. Before troubleshooting the climate control system, refer to B-CAN System Diagnosis Test Mode A Troubleshooting (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ), and the communication circuit self-diagnostic function test.

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1. Turn the ignition switch ON (II).
2. Press and hold the OFF button. While holding the OFF button, press the rear window defogger button five times within 10 seconds. Release the OFF button. All the LEDs and LCD segments should blink three times, then the self-diagnostic begins. Wait for about one minute for the self-diagnostic to complete. NOTE: The blower motor can be run at any speed regardless of what the panel is displaying. If there is any problem in the system, the temperature indicator will light the AUTO indicator and the segment (A through N) corresponding to the error. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N) and AUTO indicator. To determine the meaning of the DTC, refer to the «DTC TROUBLESHOOTING INDEX»(ref-220983-S09967046352006022200000) . If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off. Canceling the Self-diagnostic Function
3. Turn the ignition switch OFF to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other malfunctions.

Check these items before using the sensor input display mode

1. Turn the ignition switch ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control knob to the desired test temperature. When selecting the test temperature, note these items: "Lo" temperature setting will default to MAX COOL, VENT, and RECIRC. "Hi" temperature setting will default to MAX HOT, FLOOR, and FRESH. 61 through 89°F settings will use the automatic climate control logic.
3. Turn the ignition switch OFF.

To run the sensor input display mode, follow these steps

1. Turn the ignition switch OFF.
2. Press and hold both the AUTO and recirculation buttons, then start the engine.
3. After the engine starts, release the 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 button. SENSOR ITEM CHART Sensor Item Displayed Value 1 In-car Temperature °C 2 Outside Air Temperature °C 3 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 10kcal/m 2 .h 4 Evaporator Outlet Air Temperature °C 5 Driver's Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening 6 Passenger's Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening 7 Driver's Vent Temperature Air Out (TAO-Dr) °C 8 Rear In-car Temperature °C 9 Rear Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening 10 Rear Vent Temperature Air Out (TAO-Rr) °C 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, or refer to checking DTCs by DTC indication to check for DTCs «CHECKING DTCS BY DTC INDICATOR»(ref-220983-S31996700242006022200000) . 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 a known-good sensor, and recheck.
5. To cancel the sensor input display mode, press the AUTO button or turn the ignition off.

CELSIUS TO FAHRENHEIT CONVERSION (1 OF 2)

CELSIUS TO FAHRENHEIT CONVERSION (2 OF 2)

ALPHANUMERIC CONVERSION

A/C Pressure Switch

The A/C pressure switch consists of a high-low pressure switch (A/C pressure switch A) and a middle pressure switch (A/C pressure switch B).

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1. High-low pressure switch If the refrigerant pressure becomes too high (due to blockage or lack of airflow at the condenser), or too low (due to leakage), the A/C pressure switch stops the A/C request signal to the PCM and the A/C compressor stops operating.
2. Middle pressure switch If the refrigerant pressure goes above 1,520 kPa (15.5 kgf/cm 2 , 221 psi), the A/C pressure switch closes to signal the PCM to change the speed of the A/C condenser fan and radiator fan to high. When the refrigerant pressure drops below 1,230 kPa (12.5 kgf/cm 2 , 178 psi), the A/C pressure switch opens to signal the PCM to change the speed of the A/C condenser fan and radiator fan to low.

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