Service Information

Volt

Heater Water Shutoff Valve Replacement

Callout

Component Name

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

•	Identify how to disable high voltage.

•	Identify how to test for the presence of high voltage.

•	Identify conditions under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.

Preliminary Procedures

Disable high voltage system. Refer to High Voltage Disabling and High Voltage Enabling .
Pinch and remove the heater water shutoff valve actuator inlet hose from valve. Refer to Heater Water Shutoff Valve Actuator Inlet Hose Replacement .
Pinch and remove the heater water shutoff valve inlet hose from valve. Refer to Heater Water Shutoff Valve Inlet Hose Replacement .
Pinch and remove the heater water auxiliary pump inlet hose from valve. Refer to Heater Water Auxiliary Pump Inlet Hose Replacement .

Heater Water Shutoff Valve Nuts (Qty: 2).

Caution: Refer to Fastener Caution in the Preface section.

Tighten
9 N·m (80 lb in)

Heater Water Shutoff Valve

Note: Prevent coolant contact with electrical connectors.

Procedure

Check and fill the coolant. Refer to Cooling System Draining and Filling .
Perform the heater water shutoff valve learn procedure.