Diagnostic Trouble Code (DTC) Information ECM-9530

Condition

Fig 1: Identifying Accelerator Pedal (AP) Position Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is a fault in the PWM signal from the accelerator pedal (AP) position sensor, or that the difference between the analog signal and the PWM signal from the accelerator pedal (AP) position sensor to the engine control module (ECM) is too great. The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

The accelerator pedal (AP) does not function while the brake pedal is pressed.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable between the accelerator pedal (AP) position sensor and the engine control module (ECM)
Damaged accelerator pedal (AP) position sensor.

Signal too low

Contact resistance or oxidation in the terminals between the accelerator pedal (AP) position sensor and the engine control module (ECM)
Open-circuit in the power supply (12 V) for the accelerator pedal (AP) position sensor
Open-circuit or short-circuit to ground in the signal cable between the accelerator pedal (AP) position sensor and the engine control module (ECM)
Damaged accelerator pedal (AP) position sensor.

Faulty signal

Contact resistance or oxidation in the terminals between the accelerator pedal (AP) position sensor and the engine control module (ECM)
Damaged accelerator pedal (AP) position sensor.

Fault symptom[s]

Poor accelerator pedal (AP) response
Cruise control does not function at all.