1994 PCED OBDI-A | SECTION 18A: Diesel Diagnosis — 7.3L DI Engine |
E: Accelerator Pedal (AP) Sensor Introduction | E: Pinpoint Tests |

The accelerator pedal (AP) sensor provides the PCM with the driver's demand for power.
The AP signal is used in calculating desired fuel quantity, injection timing and injection control pressure.
Any detected malfunction of the AP sensor will illuminate the CHECK ENGINE light.
An AP signal that is detected out of range high or low by the PCM will cause the engine to ignore the AP signal and will only allow the engine to operate at low idle.
If a disagreement in the state of IVS and AP sensor is detected by the PCM the engine will only be allowed to operate at low idle.
| E: Pinpoint Tests |