Checking Connectors And Components

Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation.

Check the resistance values of the potentiometers in the throttle unit.

Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary.

Remedy as necessary.

Other information 

• see SIGNAL SPECIFICATION
• see COMPONENT SPECIFICATIONS
• see THROTTLE BODY
• see THROTTLE BODY, CLEANING
• see CONTENTS

Fig 2: Identifying Throttle Unit Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Throttle Unit Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Refer to VERIFICATION