Throttle Valve Control Module -J338-, CHECKING

Function 

Throttle valve operation occurs by an electric motor identified as EPC Throttle Drive -G186- located within the Throttle Valve Control Module - J338-. It is controlled by the Engine Control Module - J623- with primary inputs from the Accelerator Pedal Position Sensor -G79- / Accelerator Pedal Position Sensor 2 -G185- as well as other peripheral inputs from EPC Throttle Drive Angle Sensor 1 -G187- and EPC Throttle Drive Angle Sensor 2 -G188-.

The Throttle Valve Control Module -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 -J338- components cannot be serviced separately, it must be serviced as a unit.

Special tools and workshop equipment required 

• Multimeter
• Wiring Diagram
• Scan Tool

Test requirements 

• Fuses OK.
• Battery voltage OK.
• Switch OFF All electrical and electronic accessories.
• Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
• Vehicles with Manual Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
• Coolant Temperature: ≥ 80° C.
• Observe all safety precautions. Refer to: SAFETY PRECAUTIONS .
• View clean working conditions. Refer to: CLEAN WORKING CONDITIONS .

Test Procedure