Signal Description. Accessory Electronic Module (AEM)
NOTE:
It is important to connect the breakout box and check the ground terminals before taking readings.
Other information
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | % duty = | Duty cycle (pulse ratio) as a percentage (%) |
| t = | Time in milliseconds (ms) | - | - |
| Connector A, terminals #A1-#A4 The following values are measured between the relevant terminal in column 1 and terminal #A1 (power ground) unless otherwise stated.
NOTE:
Check the ground terminals before starting to take readings with the breakout box.
|
| Terminal in the breakout box | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #51 | #A1 | Power ground | Ulow | Ulow | Ulow | Ulow | - |
| #52 | #A2 | 30-supply to the accessory electronic module | Ubat | Ubat | Ubat | Ubat | - |
| #53 | #A3 | Communication CAN L low speed network | 1.5-2.5 V | 1.5-2.5 V | 1.5 V, at communication | ||
| #54 | #A4 | Communication CAN_H low speed network | 2.5-3.5 V | 2.5-3.5 V | 3.5 V, at communication | ||
| Connector B, terminals #B1 - #B50 The following values are measured between the relevant terminal in column 1 and terminal #A1 (power ground) unless otherwise stated.
NOTE:
Check the ground terminals before starting to take readings with the breakout box.
|
| Terminal in the breakout box | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #1 | #B1 | Remote start, power supply | Ubat | Ubat | Ubat | Ubat | Remote start module always activated |
| #2 | #B2 | Remote start, ground | Ulow | Ulow | Ulow | Ulow | - |
| #3 | #B3 | Remote start, digital input signal | Ulow | U=3V or U=5V | Ulow | U=3V or U=5V | Pulses with variable time periods |
| #4 | #B4 | Electric engine block heater, ground | Ulow | Ulow | Ulow | Ulow | - |
| #5 | #B5 | Electric engine block heater, control signal | Ubat | Ulow | Ubat | Ulow | - |
| #6 | #B6 | Reverse (reversing) warning system, power supply | Ulow | Ulow | Ubat | Ulow |
NOTE:
Does not apply to XC90 2003-
|
| #7 | #B7 | Reverse (reversing) warning system buzzer, digital input signal | Ubat | Ubat | Ulow | Ubat |
NOTE:
Does not apply to XC90 2003-.
|
| #8 | #B8 | Reverse (reversing) warning system, ground | Ulow | Ulow | Ulow | Ulow |
NOTE:
Does not apply to XC90 2003-.
|
| #9 | #B9 | - | - | - | - | - | - |
| #10 | #B10 | - | - | - | - | - | - |
| #11 | #B11 | Carphone mute, digital input signal | Ubat | Ubat | Ulow | Ubat | - |
| #12 | #B12 | Mute signal (radio), digital output signal | Ubat | Ubat | Ulow | Ubat | - |
| #13 | #B13 | Rheostat signal (radio), digital output signal | Ulow | Ulow | PWM = 6.3%-100% |
PWM = 6.3%-100% |
Pulse width modulation (PWM) signal |
| #14 | #B14 | Speed signal (radio), digital output signal | Ubat | Ubat | PWM = 30%-70% |
PWM = 30%-70% |
Pulse width modulation (PWM) signal |
| #15 | #B15 | Alarm signal P0, digital output signal | Ulow | Ubat | Ubat | Ubat | Status "Ignition off " on condition the ignition key is out |
| #16 | #B16 | Alarm signal P1, digital output signal | Ulow | Ubat | Ubat | Ubat | Status "Ignition off " on condition the ignition key is out |
| #17 | #B17 | - | - | - | - | - | - |
| #18 | #B18 | - | - | - | - | - | - |
| #19 | #B19 | - | - | - | - | - | - |
| #20 | #B20 | - | - | - | - | - | - |
| #21 | #B21 | - | - | - | - | - | - |
| #22 | #B22 | - | - | - | - | - | - |
| #23 | #B23 | - | - | - | - | - | - |
| #24 | #B24 | - | - | - | - | - | - |
| #25 | #B25 | - | - | - | - | - | - |
| #26 | #B26 | - | - | - | - | - | - |
| #27 | #B27 | - | - | - | - | - | - |
| #28 | #B28 | - | - | - | - | - | - |
| #29 | #B29 | - | - | - | - | - | - |
| #30 | #B30 | Aerial amplifier, power supply | Ulow | Ulow | Ubat | Ubat | U=Ubat at ignition key position I |
| #31 | #B31 | - | - | - | - | - | - |
| #32 | #B32 | - | - | - | - | - | - |
| #33 | #B33 | Alarm signal S0, digital output signal | U bat | U bat | U low | U bat | - |
| #34 | #B34 | Alarm signal P1, digital output signal | U low | U low | U bat | U low | - |
| #35 | #B35 | - | - | - | - | - | - |
| #36 | #B36 | - | - | - | - | - | - |
| #37 | #B37 | - | - | - | - | - | - |
| #38 | #B38 | - | - | - | - | - | - |
| #39 | #B39 | - | - | - | - | - | - |
| #40 | #B40 | - | - | - | - | - | - |
| #41 | #B41 | - | - | - | - | - | - |
| #42 | #B42 | - | - | - | - | - | - |
| #43 | #B43 | - | - | - | - | - | - |
| #44 | #B44 | - | - | - | - | - | - |
| #45 | #B45 | - | - | - | - | - | - |
| #46 | #B46 | - | - | - | - | - | - |
| #47 | #B47 | - | - | - | - | - | - |
| #48 | #B48 | - | - | - | - | - | - |
| #49 | #B49 | - | - | - | - | - | - |
| #50 | #B50 | - | - | - | - | - | - |