Engine Coolant Shut-off Valve (ECSSV)

Specifications

Specification

Description and Operation

Description

The engine coolant shut-off valve is installed on the upper side of the engine and is connected to the actuator that controls the engine coolant shut-off valve.

The engine coolant shut-off valve controls the coolant shut-off valve to stop the coolant flow when the engine is first started.

Operation

Engine Status	Item	Operation Condition	Operation
Engine Coolant Shut-off	Engine Coolant Valve	Closed	By stopping the coolant flow, the engine warm-up time is reduced.
	Block Thermostat	Closed
	Solenoid valve	ON
Normal	Engine Coolant Valve	Open	By stopping the coolant flow into the cylinder block, it increases the cylinder block temperature.
	Block Thermostat	Closed
	Solenoid valve	OFF
High Speed / High Load	Engine Coolant Valve	Open	Prevents overheating of the cylinder block.
	Block Thermostat	Open
	Solenoid valve	OFF

Circuit Diagrams

Wiring Diagram

[M/T]

[A/T]

Repair Procedures

Inspection

1. 1

   Turn the ignition off.

2. 2

   Disconnect the VIS valve connector.

3. 3

   Measure the resistance between terminals 1 and 2 of the VIS valve.

   Specification: 28.3–31.1 Ω [20 °C]

Removal

1. 1

   Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

2. 2

   Disconnect the connector from the engine coolant shut-off valve.

3. 3

   Disconnect the vacuum hoses (A) from the valve.

4. 4

   Remove the mounting bolt (B) of the engine coolant shut-off valve.

   

Installation

1. Install in the reverse order of removal.