Ww2.justanswer.com



2005 PILOT - How to Troubleshoot the Climate Control SystemClimate Control SystemHow to Retrieve a DTCThe climate control unit has a self-diagnostic function.Running the Self-diagnostic FunctionTurn the ignition switch ON (II).Press the AUTO button and then the OFF button. Continue to hold both buttons down for 1 minute.If there is any abnormality in the system, the temperature indicator will light up the segment (A through N) corresponding to the error. If no DTCs are found, go to symptom troubleshooting index. The temperature indicator will then alternate every second between displaying ''88'' (all segments lit) and the error code segment (A through N).NOTE: The system will only display the DTC when the AUTO and OFF buttons are pressed. If you release the buttons, the display will go blank. To return the display, simply press the AUTO then the OFF buttons again.To determine the meaning of the DTC, refer to the DTC troubleshooting index. If there is no abnormality, the segments will not light up.NOTE: If there are no DTC's detected (no opens or shorts in the climate control circuits or sensors), and the system is still not operating properly, check the sensor input to the climate control unit.Cancelling the Self-diagnostic FunctionTurn 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.Rear Heater-A/C Control SystemHow to Retrieve a DTCThe climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:Turn the ignition switch ON (II).Turn the temperature control knob to LO for about 20 seconds, then HI for about 20 seconds.Press the OFF button, then press the recirculation control button to select Recirculation (recirculation indicator comes on).Press and hold the recirculation control button to select Fresh (recirculation indicator goes off). Continue to hold the button. The recirculation indicator comes on for 2 seconds, and then goes off.If the system is OK, the recirculation indicator stays off.If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty circuit or component.After recording the DTC, release the recirculation control button.To determine the meaning of the DTC, refer to the DTC troubleshooting index for rear heater-A/C control system.Cancelling the Self-diagnostic FunctionTurn 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.Displaying Sensor Inputs at the Climate Control UnitThe climate control unit has a mode that displays sensor inputs it receives. This mode shows you what the climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is faulty.Check these items before using the sensor input display mode: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.Set the temperature control knob to the desired test temperature. When selecting the test temperatures, 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.Turn the ignition switch OFF.To run the sensor input display mode, follow these steps:Turn the ignition switch OFF.Press and hold both the AUTO and RECIRC buttons, then start the engine.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.To advance to the next sensor, press the rear window defogger button.SensorItemDisplayed Value1In-car Temperature Sensor?C2Ambient Temperature?C3Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65kcal/m2?h4Engine Coolant Temperature?C5Evaporator Outlet Air Temperature?C6Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution)% of opening7Vent Temperature Air Out (TAO)?C8Vehicle Speed (Vehicle must be driven to display speed)km/hNOTE: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. Run the self-diagnostic function to check for a DTC.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 sensor, and recheck.To cancel the sensor input display mode, press the AUTO button, or turn the ignition OFF.Celsius to Fahrenheit Conversion Table?C?F?C?F?C?F?C?F?C?F0321050206830864010413411522170318841106236125422723290421083371355237333914310943914572475349344111541155925773595451136431661267936974611574517632781379947117846186428823810048118948196629843910249120Celsius to Fahrenheit Conversion Table?C?F?C?F?C?F?C?F?C?F5012260140701588017690194511246114271160811789119652126621447216282180921985312763145731638318193199541286414774165841839420155131651497516785185952035613366151761698618796205571356715277170871889720758136681547817288190982085913969158791748919299210Alphanumeric Conversion TableDisplay Reading (Alphanumeric)?C?F%A1 thru A9-1 thru -930 thru 16-1 thru -9B0 thru B9-10 thru -1914 thru -2-10 thru -19C0 thru C9-20 thru -29-4 thru -20-20 thru -29D0 thru D9-30 thru -39-22 thru -38-30 thru -39E0 thru E9-40 thru -49-40 thru -58-F0 thru F9-50 thru -59-58 thru -74+100 thru +109 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download