engine coolant temperature sensor removal (RZ4E-TC)

1. Preliminary and post procedures

1) Open the engine hood.

2) Disconnect the battery cable from the battery negative terminal.

Caution

After turning OFF the ignition switch (power mode for models with passive entry and start system), do not disconnect the battery cable within 3 minutes.
If the battery cable is disconnected within 3 minutes, the vehicle electronic control system may malfunction.
If the battery cable is disconnected, perform the setting of the front door power window switch with AUTO UP/AUTO DOWN function after connecting the battery negative terminal.

3) Raise the vehicle.

Warning

Do not loosen the radiator cap or reserve tank cap when coolant is hot, as doing so may result in burns caused by the release of steam or hot water.
When opening the radiator cap, cover the cap with a thick cloth once the engine coolant has cooled and slowly turn to release pressure.

1) Remove the radiator cap from the radiator.

2) Loosen the radiator drain plug, and drain the coolant into a pan.

3) Loosen the drain plug on the cylinder block, and drain the coolant to a pan.

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4) Apply LOCTITE 262 or equivalent to the threaded portion of the drain plug.

5) Tighten the drain plug on the cylinder block.

Tightening torque: 21.6 N・m { 2.2 kgf・m / 16 lb・ft }

6) Tighten the radiator drain plug.

1) Disconnect the connector from the engine coolant temperature sensor.

2) Remove the engine coolant temperature sensor from the thermostat housing.

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