Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Coolant thermostat (coolant temperature below thermostat regulating temperature)

Toyota Corolla (E120): Coolant thermostat (coolant temperature below thermostat regulating temperature)

Dtc p0128 coolant thermostat (coolant temperature below thermostat regulating temperature)

Hint

: this is the purpose of the ”thermostat” malfunction detection.

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Switches
Instrument panel light control dial Automatic High Beam switch Heated steering wheel switch* Windshield wiper de-icer switch* Outside rear view mirror switch Door lock switches Power window switches Window lock switch *: If equipped Meter control switches Paddle shift switches*1 C ...

Key confinement prevention function does not work properly (unlock warning switch circuit)
Circuit description The unlock warning switch turns on when the key is inserted in the ignition key cylinder and the door courtesy switch turns on when the driver’s door is opened, and the integration relay monitors both switches conditions. According to these switches conditions, the int ...

If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle's battery is discharged. You can also call your Toyota dealer or a qualified repair shop. Restarting the engine If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start you ...