Checking The Component And Wiring

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

Ignition off
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 the power supply cable (5 V) between engine control module (ECM) terminal #A19 (#A19) and throttle unit terminal #3 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground.

HINT: With the ignition on, the power supply to the throttle unit potentiometers must be approximately 5 V measured between throttle unit connector terminals #2 and #3 (cable harness side).

Check the signal cable (potentiometer 1) between engine control module (ECM) terminal #A65 (#B5) and throttle unit terminal #6 (cable harness side). Check for a short-circuit to ground.

If no faults are found during the checks and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit.

NOTE:
When replacing the throttle unit, the throttle unit must be adapted. See VIDA vehicle communication (Throttle unit adaptation). VIDA is Volvo-specific scan tool.

Remedy as necessary.

Other information:
- see CONNECTING THE BREAKOUT BOX
- see SIGNAL SPECIFICATION (2007) or SIGNAL SPECIFICATION (2008-2011)
- see COMPONENT SPECIFICATIONS
- see THROTTLE BODY
- see CONTENTS
Fig 2: Identifying Throttle Unit Connector Terminals
Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Ohm Meter
Courtesy of VOLVO CARS CORPORATION

Fig 4: Identifying Throttle Unit Connector Terminals
Courtesy of VOLVO CARS CORPORATION

Continue
Refer to VERIFICATION