Throttle Valve Control Module - GX3-, Checking: General Description

The throttle valve operation occurs by an electric motor identified as the EPC Throttle Drive -G186- located within the Throttle Valve Control Module -GX3-. It is controlled by the Engine/Motor Control Module - J623- with primary inputs from the Accelerator Pedal Module -GX2- as well as other peripheral inputs from the EPC Throttle Drive Angle Sensor 1 -G187- and the EPC Throttle Drive Angle Sensor 2 -G188-.

Note the Throttle Valve Control Module -GX3- is also referred to as the Throttle Valve Control Module -J338-.

The Throttle Valve Control Module -GX3 / J338- contains the following components: 

• EPC Throttle Drive -G186-.
• EPC Throttle Drive Angle Sensor 1 -G187-.
• EPC Throttle Drive Angle Sensor 2 -G188-.

The Throttle Valve Control Module -GX3 / J338- components cannot be serviced separately, and they must be serviced as a unit.

Special tools and workshop equipment required 

• Multimeter.
• Wiring Diagram.
• Scan Tool.