Jul 252015
 

how do I run self diagnostics on auto climate control

  5 Responses to “2006 toyota sienna”

  1. To access the diagnostic codes, hold down the auto and recirc/fresh air buttons at the same time while turning the ignition to on.

    You’ll see that all indicator lights and LCD elements should flash four times followed by any problem codes.

    From the Manual:
    TROUBLE SHOOTING
    SELF-DIAGNOSTICS
    An Electronic Control Unit (ECU) within A/C-heater control
    panel monitors system circuits and stores trouble codes in memory if
    problems are detected. All codes, except Codes 22 and 23, are stored
    in memory. Malfunction is current if Code 22 or 23 is displayed. To
    retrieve stored codes, see RETRIEVING CODES. Codes are displayed at
    temperature display. See Fig. 2.
    RETRIEVING CODES
    1) Simultaneously press and hold AUTO and recirculated air
    switches. See Fig. 2. Turn ignition on. All indicators will flash 4
    times, at one-second intervals. Tone will sound when indicators flash.
    2) A/C system will enter self-diagnostic mode. To end
    indicator check, press and release OFF switch. Read codes at
    temperature display.
    3) If trouble code is displayed, proceed to appropriate
    trouble shooting procedure. See DIAGNOSTIC CODE IDENTIFICATION table.
    Codes are displayed in ascending order. To slow rate at which codes
    are displayed, press fresh air button to change display to step
    operation. Each time fresh air button is pressed, display changes by
    one step.
    4) If tone sounds as code is displayed, problem currently
    exists. If tone does not sound as code is displayed, problem occurred
    in past and does not presently exist.
    Code Diagnosis
    00 ………………………………………… Normal
    11 (1) …………. In-Vehicle Temperature Sensor Circuit
    12 (2) ……………. Ambient Temperature Sensor Circuit
    13 …………….. Evaporator Temperature Sensor Circuit
    14 ……………….. Coolant Temperature Sensor Circuit
    21 (3) ………………………… Solar Sensor Circuit
    22 (4) ……………….. Compressor Lock Sensor Circuit
    23 (4) ……………………… Pressure Switch Circuit
    31 ……………… Air Mix Door Position Sensor Circuit
    32 ……………. Air Inlet Door Position Sensor Circuit
    33 …………… Air Outlet Door Position Sensor Circuit
    41 ………………….. Air Mix Door Servomotor Circuit
    42 ………………… Air Inlet Door Servomotor Circuit
    43 ……………….. Air Outlet Door Servomotor Circuit
    (1) – If in-vehicle temperature is -4  F (-20  C) or less,
    Code 11 may set even though system is normal.
    (2) – If outside air temperature is -58  F (-50  C) or less,
    Code 12 may occur set though system is normal.
    (3) – If testing is done in a dark area, Code 21 may set
    even though system is normal. Shine a light at solar
    sensor and recheck codes.
    (4) – Malfunction is current. Code is not stored in memory.

    ACTUATOR CHECK
    1) Perform step 1) of RETRIEVING CODES. When system enters
    self-diagnostic mode, press recirculated air button. Each mode door,
    motor, and relay will operate at one-second intervals. Press fresh air
    button to display codes one at a time, and perform step-by-step
    actuator check.
    2) Check airflow and temperature by hand. Tone will sound
    each time display code changes. Each display code is associated with a
    system operating condition. See Fig. 3 or 4. Press OFF button to
    cancel actuator check mode.

  2. I think I am reading this right. I cannot find a code definition for code 31. my problems are a/c compressor is not kicking on but I have full voltage to the compressor, the front blower is not coming on at any speed, when I disconnect and send voltage it does run. it appears I am getting a solid GROUND to the fan when it is connected. What is code 31. I also believe that the compressor is bad. any advice?

  3. If you are getting battery voltage (positive and negative) to the Air Conditioning compressor and the clutch is not pulling in, the Compressor Clutch is shot. Generally the entire compressor is replaced at this point.
    Code 31 Abnormal air mix servo-motor potentiometer output voltage ( Air Mix Door Position Sensor Circuit)

    Step by Step Air Conditioning Troubleshooting

  4. awesome!!! Them 2 problems are repaired. I still have not repaired the front blower motor. I have put 10 amps direct to the blower and works fine. through the circuit I get nothing, not even on high. the switch and the display seem to work properly. all four wires at the resistor are showing ground, however one of the tiny wires shows a an intermittent ground the pulses faster as you turn up the blower switch. The rear blower works fine. any idea???

  5. Thank You for the Donation!
    You should see battery voltage on Blk/Blu wire. Looks like the voltage comes from the HTR fuse 50amp.
    2006 Toyota Sienna Blower motor wiring diagram

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