Signal Specification, Phone Module (PHM)

Signal specification

General
All the values given below are between the terminals stated in column 1 and terminal #A6 in column 2 (power ground). This applies unless otherwise indicated in brackets.

Note! It is important to connect the breakout box and check the ground terminals before taking readings.

For further information about:
- connecting the breakout box, see "Connecting the breakout box, phone module (PHM)".
- Checking ground connection, see "Checking voltage / ground connection, phone module (PHM)".
There may be several connections and connectors between the control module and components. See the relevant section in the wiring diagram for further information about these.