Toyota Corolla Cross: Blower Motor does not Operate
DESCRIPTION
If air does not flow from the front registers after the blower switch on the air conditioning control assembly is operated, the following factors may be the cause.
|
Symptom | Factor |
|
Blower motor does not operate at all
- (Air does not blow from registers)
|
- Air conditioning amplifier assembly malfunction
- Blower motor with fan sub-assembly malfunction
- Warm-up control
- Engine coolant temperature sensor malfunction
- Harness or connector
|
PROCEDURE
| 1. |
CHECK AIR CONDITIONING SYSTEM (MANUAL MODE) |
(a) Turn off the AUTO switch, operate the blower switch and check that the blower motor with fan sub-assembly can be operated manually.
OK:
The blower motor with fan sub-assembly operates normally.
| NG |
.gif) | GO TO OTHER DIAGNOSIS PROCEDURE (Blower Motor Circuit) |
|
OK |
.gif) | |
(a) Read the Data List according to the display on the GTS.
Powertrain > Engine > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|
Coolant Temperature | Engine coolant temperature |
Min.: -40°C (-40°F), Max.: 140°C (284°F) |
75 to 100°C (167 to 212°F): After warming up |
This is the engine coolant temperature.
HINT:
- After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
- After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.
- If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
- Check if the engine overheats if the value indicated is higher than 135°C (275°F).
|
Powertrain > Engine > Data List
|
Tester Display |
| Coolant Temperature |
OK:
After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.
| OK |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG |
| GO TO COOLING SYSTEM |
READ NEXT:
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(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
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