Contents: Fan resistor ↓ Evaporator Air Temperature Sensor ↓ Air conditioner switch ↓ Fan speed switch (except Sirion) ↓ Fan speed switch (Sirion) ↓
Fan resistor
Measure the resistance between the connector terminals.
Evaporator Air Temperature Sensor
Measure the resistance between the terminals.
Nominal resistance:
- at 15°C - 2.3 kOhm
- at 25°C - 1.5 kOhm
Air conditioner switch
1. Make sure there is no conductivity between the "+B" and "GND" terminals.
2. If there is continuity between the EFI ECU terminals and GND, check that there is no continuity between the EFI ECU terminals and +B.
3. If there is no continuity between the EFI ECU terminals and GND, check for continuity between the EFI ECU terminals and +B.
Fan speed switch (except Sirion)
1. Check the heater fan speed switch for continuity.
2. Make sure that the fan motor turns on when the battery is connected to the connector terminals.
Fan speed switch (Sirion)
Check the heater fan speed switch for continuity.
The official source is on the portal [Toyotaman.ru]