Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HBFR
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 11/2022]
Title: 2ZR-FAE (COOLING): THERMOSTAT: INSPECTION; 2020 - 2023 MY Corolla [01/2019 - 11/2022]

INSPECTION

PROCEDURE

1. INSPECT THERMOSTAT

CAUTION:

  • Do not put your hands into the water that has been heated for the inspection.
  • Touching the heated water could result in burns.

HINT:

The valve opening temperature is inscribed on the thermostat.

(a) Immerse the thermostat in water, and then gradually heat the water.

(b) Check that the valve of the thermostat opens at the specified temperature.

Standard Valve Opening Temperature:

78 to 82°C (172 to 180°F)

If the result is not as specified, replace the thermostat.

(c) Check the valve lift.

Standard Valve Lift:

Item

Condition

Specified Condition

Type A

93°C (199°F)

10 mm (0.394 in.) or more

Type B

95°C (203°F)

10 mm (0.394 in.) to 14 mm (0.551 in.)

If the result is not as specified, replace the thermostat.

*A

for Type A

*B

for Type B

*a

Valve Lift

(d) Check that the valve is fully closed when the thermostat is at low temperatures (below 75°C (167°F)).

If not fully closed, replace the thermostat.