SIGNAL SPECIFICATION
General
All the values given below are between the respective connection in column 1 and connection #A6 in column 2 (power ground) unless otherwise stated in brackets.
Note. It is important to connect the breakout box and check the ground terminals before taking readings.
For information on
- 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 control modules and components. For more information, see the appropriate service information.
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) |
|---|---|---|---|
| U bat = | Battery voltage (V) | F = | Frequency in Hertz (Hz) |
| U low = | Voltage approx. 0 V | T = | Time in s (seconds) |
| PWM = | Pulse-width modulated signal in % |
Scheme 523
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #1 | #A1 | ||||
| #2 | #A2 | ||||
| #3 | #A3 | ||||
| #4 | #A4 | ||||
| #5 | #A5 | +30-feed | U bat | U bat | |
| #6 | #A6 | Power ground | U low | U low | |
| #7 | #A7 | Handset, voltage feed | U bat | U bat | |
| #8 | #A8 | Handset, cradle signal | U=5 V when handset is used, otherwise U=0 V. | U=5 V when handset is used, otherwise U=0 V. | |
| #9 | #A9 | ||||
| #10 | #A10 | ||||
| #11 | #A11 | CAN (L) | Digital signal | Digital signal | |
| #12 | #A12 | CAN (H) | Digital signal | Digital signal | |
| #13 | #A13 | L | |||
| #14 | #A14 | ||||
| #15 | #A15 | ||||
| #16 | #A16 | ||||
| #17 | #A17 | Impact cable from SRS | U=12 V at activated SRS-component, otherwise U=0 V | U=12 V at activated SRS-component, otherwise U=0 V | |
| #18 | #A18 | Handset, ground | U low | U low | |
| #19 | #A19 | Handset, microphone | Alternating voltage at sound in microphone | Alternating voltage at sound in microphone | Difficult to measure |
| #20 | #A20 | Handset, speaker | Alternating voltage at sound in speaker | Alternating voltage at sound in speaker | Difficult to measure |
| #21 | #A21 | ||||
| #22 | #A22 |
SIGNAL TABLE CONNECTOR A, PHONE MODULE (PHM)
Scheme 524
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #21 | #B1 | Clock signal to SIM-card | Pound signal | Pound signal | |
| #22 | #B2 | Signal ground, SIM-card | U low | U low | |
| #23 | #B3 | Voltage feed, SIM-card | U=2.8 V | U=2.8 V | |
| #24 | #B4 | Communication cable, SIM-card | Pulsed signal | Pulsed signal | |
| #25 | #B5 | Control signal, SIM-card | Pulsed signal | Pulsed signal | |
| #26 | #B6 | Diagnostic cable, SIM-card | U low | U low |
SIGNAL TABLE CONNECTOR B, PHONE MODULE (PHM)
Scheme 525
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #C1 | Telephone antenna | Antenna signal telephone | Antenna signal telephone | ||
| #C2 | Antenna ground | U low | U low |
SIGNAL TABLE CONNECTOR C, PHONE MODULE (PHM)
Scheme 526
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #D1 | MOST input signal | Optical input signal when the MOST network is activated | Optical input signal when the MOST network is activated | ||
| #D2 | MOST output signal | Optical output signal when the MOST network is activated | Optical output signal when the MOST network is activated |
SIGNAL TABLE CONNECTOR D, PHONE MODULE (PHM)
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #21 | #1 | Clock signal to SIM-card | Pound signal | Pound signal | |
| #22 | #2 | Signal ground, SIM-card | U low | U low | |
| #23 | #3 | Voltage feed, SIM-card | U=2.8 V | U=2.8 V | |
| #24 | #4 | Communication cable, SIM-card | Pulsed signal | Pulsed signal | |
| #25 | #5 | Control signal, SIM-card | Pulsed signal | Pulsed signal | |
| #26 | #6 | Diagnostic cable, SIM-card | U low | U low |
SIGNAL TABLE CONNECTOR SIM-CARD HOLDER
Scheme 527
| Connection breakout box | Connection control module | Signal type | Ignition on | Idle | Other |
|---|---|---|---|---|---|
| #21 | #1 | Handset, microphone | Alternating voltage at sound in microphone | Alternating voltage at sound in microphone | Difficult to measure |
| #22 | #2 | Handset, speaker | Alternating voltage at sound in microphone | Alternating voltage at sound in microphone | Difficult to measure |
| #23 | #3 | Handset, ground | U low | U low | |
| #24 | #4 | Handset, cradle signal | U=5 V when handset is used, otherwise U=0 V. | U=5 V when handset is used, otherwise U=0 V. | |
| #25 | #5 | Handset, voltage feed | U bat | U bat |
SIGNAL TABLE CONNECTOR HANDSET