Fault Detection/Management

Any detected malfunction of the APP sensor illuminates the electronic throttle control (wrench) indicator. A PCM detected fault on one of the 3 sensor signals will permit normal operation. A fault with 2 sensor signals only allows the engine to operate at idle.

CAUTION: The PCM harness connectors must be properly seated and the connector latch properly attached to eliminate possible driveability concerns or a no start condition. Installing the PCM connectors on an angle may cause an improper connection, misdiagnosis, and damaged components. Install the connector until the lever pivots and seats itself. Apply light pressure to get the connector into position on the PCM and then fully seat the connector.

NOTE: Visually inspect the harness connectors for corrosion, damage, proper mating, and correct pin tension.

Fig 1: Identifying PCM Body Harness Connector

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Accelerator Pedal Position Sensor - F-Super Duty, E-Series APP Connector

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Accelerator Pedal Position Sensor - Excursion APP Connector

Courtesy of FORD MOTOR CO.

NOTE: Base idle should not be less than 0.5 volt.