Checking Components And Wiring

Check the power supply cable (5 volts) between engine control module (ECM) terminal #B9 (#B19) and accelerator pedal (AP) position sensor terminal #6 (wiring side). Check for an open-circuit. Check for a short-circuit to ground.

Check the signal ground cable between engine control module (ECM) terminal #B5 (#B15) and accelerator pedal (AP) position sensor terminal #4 (wiring side). Check for an open-circuit.

HINT: With the ignition on, the power supply from the engine control module (ECM) must be approximately 5 V measured between accelerator pedal (AP) position sensor terminals #6 (wiring side) and #4 (wiring side). 

Check the signal cable between engine control module (ECM) terminal #B17 (#B27) and accelerator pedal (AP) position sensor terminal #5. Check for an open-circuit. Check for a short-circuit to ground.

Try a new accelerator pedal (AP) position sensor if no fault is found and the fault is permanent.

Remedy as necessary.

Other information: 

• see CHECKING WIRING AND TERMINALS
• To connect the breakout box, see CONNECTING THE BREAKOUT BOX
• For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
• For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
• For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
• For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
• To access and replace the accelerator pedal (AP) position sensor, see ACCELERATOR PEDAL (AP), REPLACING .

Fig 2: Accelerator Pedal Position Sensor Connector Terminal Identification

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 4: Identifying Accelerator Pedal (AP) Position Sensor

Courtesy of VOLVO CARS CORPORATION

Refer to VERIFICATION