Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The accelerator pedal position sensor has two different internal sensors, where one generates an analogue signal and the other a pulse-width modulated (PWM) signal.
If Engine control module (ECM) registers that the analogue signal from the accelerator pedal position sensor is lower than 0.15 V or higher than 4.85 V for longer time than 0.3 seconds with ignition on, then diagnostic trouble code ECM-9530, Too low/high signal, is stored.
For upgraded software, released during year 2006 or later, the above detection times are increased from 0.1 to 0.4 seconds.
For more information about the electronic throttle system and related components such as the electronic throttle module, accelerator pedal position sensor, brake light switch, clutch pedal position sensor, and brake pedal position sensor: Design Design

Substitute value
- Slow opening of throttle.
The throttle opens slower than during normal requested open because the system is regulated by only one of the pulse width modulated signals from the accelerator pedal position sensor. The driver may notice that the engine responds a bit slower compared to normal throttle application.
- throttle closure when braking
The accelerator pedal position is ignored when the brake pedal is depressed.

Possible source

Signal too high
- short-circuit to supply voltage in the signal cable
- Damaged accelerator pedal (AP) position sensor.

Signal too low
- short-circuit to ground in the signal cable
- open-circuit in the signal cable
- open-circuit in power supply
- defective accelerator pedal (AP) position sensor
- This diagnostic trouble code is generated in combination with other trouble codes. Information on the possible root cause is described.
- For 5-cyl. normally aspirated engines.

Fault symptom[s]
- ETS warning lamp lit
- poor accelerator pedal (AP) response