Toyota Corolla (E120): Inspection

1. Cooler thermistor no.1

  1. Check resistance between terminals 1 and 2 of cooler thermistor no. 1 At each temperature, as shown in the chart.

    Resistance:

If resistance value is not as specified, replace the sensor.

If resistance value is not as specified, replace the sensor.

2. Cooler and accessory assy

  1. Inspect blower switch continuity.

If continuity is not as specified, replace the air conditioner control

If continuity is not as specified, replace the air conditioner control assy.

  1.  inspect illumination operation.

    Connect the positive (+) lead from the battery to terminal 2 and negative (–) lead to terminal 3 then check that the illuminations light up.

If there is bulb not light up, replace the bulb.

3. Cooler switch hole cover

  1. Inspect switch continuity.

    Check the continuity between terminals while switch is pressed, as shown in the chart.

If continuity is not as specified, replace the cooler switch.

If continuity is not as specified, replace the cooler switch.

  1.  inspect illumination operation.

    Connect the positive (+) lead from the battery to terminal 4 and negative (–) lead to terminal 3 then check that the illuminations light up.

    If operation is not as specified, replace the cooler switch.

  2.  inspect indicator operation.
  1.  Connect the positive (+) lead from the battery to terminal 2 and the negative (–) lead to terminal 1.
  2.  Push the a/c button in and then check that the indicator lights up.

If operation is not as specified, replace the cooler switch.

  1.  inspect dimming operation
  1.  connect the positive (+) lead from the battery to terminal 2 and the negative (–) lead to terminal 1 while press the switch.
  2.  Connect the positive (+) lead from battery to terminal 4 and then check that the indicator dims.

If operation is not as specified, replace the cooler switch.

4. Blower resistor

  1. Measure resistance between terminals, as shown in the chart below.

If resistance is not as specified, replace the blower resistor.

If resistance is not as specified, replace the blower resistor.

5. Blower w/fan motor sub–assy

  1. Connect the positive (+) lead from the battery to terminal 2 and negative (–) to terminal 1, then check that the motor operation smoothly.

If operation is not as specified, replace the blower motor.

6. Heater blower motor relay assy

If continuity is not as specified, replace the heater blower motor

If continuity is not as specified, replace the heater blower motor relay.

7. Magnet–clutch relay

If continuity is not as specified, replace the magnet–clutch relay.

If continuity is not as specified, replace the magnet–clutch relay.

    Share this page:

    Other materials:

    If the engine will not start
    If the engine will not start even though correct starting procedures are being followed , consider each of the following points: The engine will not start even though the starter motor operates normally. One of the following may be the cause of the problem: ● There may not be sufficient f ...

    Anti-glare function
    ► Manual anti-glare inside rear view mirror Reflected light from the headlights of vehicles behind can be reduced by operating the lever. 1 Normal position 2 Anti-glare position ► Auto anti-glare inside rear view mirror Responding to the level of brightness of the headlights of ...

    If a warning message is displayed
    The multi-information display shows warnings for system malfunctions and incorrectly performed operations, and messages that indicate a need for maintenance. When a message is displayed, perform the appropriate corrective action for the message. If a warning message is displayed again after the ap ...