Engine Coolant Temperature Sensor Replacement - Radiator Side

Fig 1: Engine Coolant Temperature Sensor - Radiator Side

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
WARNING: 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 includes the following steps: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures may result in serious injury or death. CAUTION: Refer to Hybrid Cooling System Caution . Preliminary Procedures Disable the high voltage system. Refer to High Voltage Disabling Drain the power electronics and auxiliary radiator cooling system. Refer to Power Electronics and Auxiliary Radiator Drain and Fill (LTG HP9) Front Bumper Fascia Lower Stiffener Replacement Disconnect the electrical connector.
1	Engine Coolant Temperature Sensor Retainer
2	Engine Coolant Temperature Sensor Procedure Fill the power electronics and auxiliary radiator cooling system. Refer to Power Electronics and Auxiliary Radiator Drain and Fill (LTG HP9) Enable the high voltage system. Refer to High Voltage Enabling Start the engine and check for coolant leaks.

Callout

Component Name

WARNING: 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 includes the following steps:

Identify how to disable high voltage.
Identify how to test for the presence of high voltage.
Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

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

CAUTION: Refer to Hybrid Cooling System Caution .

Preliminary Procedures

Disable the high voltage system. Refer to High Voltage Disabling
Drain the power electronics and auxiliary radiator cooling system. Refer to Power Electronics and Auxiliary Radiator Drain and Fill (LTG HP9)
Front Bumper Fascia Lower Stiffener Replacement
Disconnect the electrical connector.

Engine Coolant Temperature Sensor Retainer

Engine Coolant Temperature Sensor

Procedure

Fill the power electronics and auxiliary radiator cooling system. Refer to Power Electronics and Auxiliary Radiator Drain and Fill (LTG HP9)
Enable the high voltage system. Refer to High Voltage Enabling
Start the engine and check for coolant leaks.