For a complete wiring diagram Refer to Section 8W
The Accelerator Pedal Position Sensor contains two independent three wire inductive sensors. Each sensor provides independent pedal position signals to the ECM. The raw voltage signal from APP 1 sensor is 2 times the raw voltage signal from APP 2. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.
With the ignition on. No other APP DTC's set. No Sensor Reference Voltage DTC's set.
APP Sensor 1 and APP Sensor 2 signals do not agree for 0.4 second.
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Possible Causes
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INTERMITTENT DTC |
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(F855) ACCELERATOR PEDAL POSITION SENSOR NO. 1 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE |
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(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
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(K167) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
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(F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE |
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(K12) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
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(K400) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
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ACCELERATOR PEDAL POSITION SENSOR |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
NOTE: If any Sensor reference or supply voltage DTCs are present, perform the applicable diagnostic procedure before continuing with this test.
NOTE: The APP Sensor 2 signal should always be approximately 1/2 the voltage of the APP Sensor 1 signal.
