Diagnostic Trouble Code (DTC) Information ECM-970D

Condition 

Fig 1: Identifying Accelerator Pedal (AP) Position Sensor

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the basic frequency of the PWM signal from the accelerator pedal (AP) position sensor deviates from the predefined values.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

• None.

Possible Source 

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

Fault symptom[s] 

• None.