Checking The Throttle Unit

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Check that the throttle module throttle is not dirty, blocked or sticking. Clean as necessary.

HINT: A film of oil covering the throttle may mean that the flame trap is not functioning correctly. 

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

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see THROTTLE BODY, CLEANING (NON-TURBO)
• see THROTTLE BODY
• see CHECKING WIRING AND TERMINALS

Fig 2: Identifying Throttle Unit

Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING INTAKE SYSTEM AND MASS AIR FLOW SENSOR