Checking The Component And Wiring

Fig 1: Identifying Ignition OFF

GLL101045

Courtesy of VOLVO CARS OF NORTH AMERICA.

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 and damper motor winding.

NOTE:
The resistance of the motor winding in the damper motor is very low.

Replace the throttle unit if necessary.

Check damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground or supply voltage.

Check between:
- Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4
- Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1.
Also check the damper motor cables (+) and (-). Check for a short-circuit to each other.

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

The throttle unit is damaged if the diagnostic trouble code (DTC) recurs.

NOTE:
When replacing the throttle unit, the throttle unit must be adapted using VIDA

Other information
- see CONNECTING THE BREAKOUT BOX
- see SIGNAL SPECIFICATION (2004, 2005)
- see COMPONENT SPECIFICATIONS
- see THROTTLE BODY, CLEANING
- see THROTTLE BODY, REPLACING
- see CHECKING WIRING AND TERMINALS .
Fig 2: Identifying Throttle Unit Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohm Meter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Throttle Unit Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

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Refer to INFORMATION