Purpose, Function
When the engine coolant temperature is low, the thermostat blocks the engine coolant passage between the radiator and engine. As a result, because engine coolant cycles without passing through the radiator, warming is promoted.
Construction
The thermostat is installed to the rear part of the cylinder head.

The thermostat has the following parts:

Operation
1. When the engine coolant temperature decreases, the thermostat valve closes and engine coolant circulates without passing through the radiator.

2. When the engine coolant temperature is 80.5—83.5°C, the thermostat valve starts to open and the engine coolant passed through the radiator flows to the engine.

Thermostat Removal/Installation
EmissionsSteering Shaft Inspection
1. Inspect the steering column for excessive play and damage.
2. Verify that the clearance between the projection on the steering column shown
in the figure and the bracket is less than 2.0 mm {0.079 in}.
If the clearance between the projection and bracket is 2.0 mm {0.079 in}
or ...
Rear Center Seat Belt Removal/Installation
CAUTION:
The ELR (emergency locking retractor) has a spring that will unwind if the
retractor cover is removed. The spring cannot be rewound by hand. If this occurs,
the ELR will not work properly. Therefore, do not disassemble the retractor.
1. Press the release switch, then dis ...
Accelerator Pedal Position (App) Sensor Inspection
Voltage Inspection
NOTE:
Because the APP sensor is integrated in the accelerator pedal, replacing
the APP sensor includes replacement of the accelerator pedal.
1. Connect the M-MDS to the DLC?2.
2. Switch the ignition ON (engine off or on).
3. Verify that the APP sensor output ...