Switches, electrically adjustable door mirrors (124): Connection
CONNECTOR PINOUTS REFERENCE
| Pin number | Signal type | Description |
|---|---|---|
| 26 | Ground | From the control module DDM |
| 2 | Is supplied with 5V | Via a 2.37 kO resistor incorporated in the door module on the driver's side (DDM) |
The voltage measured between the pins will depend on which button is depressed. The voltage value is A/D converted and is then available in digital form. The digital voltage value is then converted to an identity for the relevant button and is placed in the control module working memory. The value is transmitted on the bus and is also used by PDM. The diagnostic resistor completes the circuit, even though no button is depressed, and therefore the voltage will never be exactly 5V during normal operation. The purpose of this is to enable the generation of a diagnostic trouble code in the event of a circuit failure.