Signal Description, Power Steering Control Module (PSCM)
General
All the values given below are measured between the respective terminal (column 1) and power ground (#C2). If this is not the case, it is indicated within brackets.
NOTE:
There is no cable harness on the Power Steering Control Module (PSCM) for connecting the breakout box. It is therefore important when any measurements are carried out that great care is taken to prevent short-circuits, damage to connectors, etc.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage in volts (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | t = | Time in seconds (s) |
| PWM = | Pulse-width modulation |
CONNECTOR A
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Engine idling | Miscellaneous |
| #A1 | - | 15-supply, from the ignition switch | U = Ubat | U = Ubat | Ignition off: U = Ulow |
| #A2 | - | HS-CAN H | During communication the following applies: U = 2.0 - 3.5 V | - | |
| #A3 | - | HS-CAN L | During communication the following applies: U = 1.5 - 2.5 V | - | |
CONNECTOR B
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Engine idling | Miscellaneous |
| #B1 | - | Control signal 1 | U=0-5 V | U=0-5 V | Pulse width modulation (PWM) signal |
| #B2 | - | Signal ground 1 | - | - | - |
| #B3 | - | Power supply | U = 5 V | U = 5 V | - |
| #B4 | - | Signal ground 2 | - | - | - |
| #B5 | - | Control signal 2 | U=0-5 V | U=0-5 V | Pulse width modulation (PWM) signal |
CONNECTOR C
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Engine idling | Miscellaneous |
| #C1 | - | 30-supply (power supply from battery) | U = Ubat | U = Ubat | Ignition off: U = Ubat |
| #C2 | - | Power ground | U=Ulow | U = Ulow | Ground terminal, connected to the chassis |