PRE-RELEASE
Accelerator pedal position sensor (379), EDC16
| Accelerator pedal position sensor (379), EDC16 |
| Location |
Accelerator pedal position sensor (379)
| Main task |
Measures accelerator pedal position.
| Type |
Potentiometer type position sensor with two resistance paths.
| Connection |
| Pin No. | Signal type | Description |
| 1 | Power supply P2, 5 V | Connected to ECM pin 46(B) |
| 2 | Power supply P1, 5 V | Connected to ECM pin 45(B) |
| 3 | Signal, P1 | Connected to ECM pin 9(B) |
| 4 | Ground P1 | Connected to ECM pin 30(B) |
| 5 | Ground P2 | Connected to ECM pin 8(B) |
| 6 | Signal, P2 | Connected to ECM pin 31(B) |
| Function |
The position sensor houses two potentiometers that vary voltage on the control module sensor inputs based on the position sensor's shaft angle.
The potentiometer consists of a resistance track with collector shoes. The collector shoes are mounted on the position sensor shaft and move over the resistance tracks in relation to the movements of the shaft.
To ensure that information from the position sensor is accurate, there are two different potentiometers. Both are supplied 5 V, but the signal to the control module is always twice as much on P1 as on P2, 0-5 V on the one and 0-2.5 V on the other. This ensures both the function and diagnosis of the position sensor. See the illustration of the inner connections of the sensor.
When the position sensor angle is less than approx. 9°, the potentiometers are in idle position and voltage on the control module inputs is less than 1.1 V and 0.55 V respectively.
