Upper Electronic Module (UEM)
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.
Connector A, terminals #A1-#A22
The following values are measured between the relevant terminal in column 1 and terminal #A20 (signal ground) unless otherwise stated.
NOTE:
Check the ground terminals before starting to take readings with the breakout box.
U = DC in volts (V).
Ubat = battery voltage in volts (V).
Ulow = voltage near 0 V.
| Terminal, breakout box | Terminal, control module | Signal type | Ignition off Active/not active |
Ignition on Active/not active |
Miscellaneous |
|---|---|---|---|---|---|
| #1 | #A1 | Power supply | Ubat | Ubat | - |
| #2 | #A2 | Third row reading lamps, control signal (XC90 only) | Ubat /0 V | Ubat /0 V | - |
| #3 | #A3 | Communication cable control modules (HS-CAN) | 2.5-3.5 V | 2.5-3.5 V | During communication. |
| #4 | #A4 | The front right reading lamp and general lighting, control signal | 7-9 V/0 V | 7-9 V/0 V | Active when the right front reading lamp or the general lighting is activated. |
| #5 | #A5 | Communication cable control modules (MS-CAN) | 1.5-2.5 V | 1.5-2.5 V | - |
| #6 | #A6 | The front right reading lamp, signal supply | Ubat /0 V | Ubat /0 V | Pulse width modulation (PWM) signal. |
| #7 | #A7 | Rear left reading lamp, signal supply | Ubat /0 V | Ubat /0 V | Active when the left rear reading lamp or the general lighting is activated. Pulse width modulation (PWM) signal. |
| #8 | #A8 | Extended X-supply | Ubat /0 V | Ubat /0 V | The power supply to the sun roof logic, mirror lamps in the sun visor, rain sensor, buttons for the headlining lighting and certain button lighting. |
| #9 | #A9 | Cargo compartment lighting (V70, V70 XC) / Third row reading lamps (XC90), power supply | Ubat /0 V | Ubat /0 V | Pulse width modulation (PWM) signal. |
| #10 | #A10 | Movement sensor (MMS) or movement sensor (IMS), power supply, (IMS replaces MMS for XC90 from and incl. model year 2012) | Ubat /0 V | Ubat /0 V | Supplies power to both MMS or movement sensor (IMS), (IMS replaces MMS for XC90 from and incl. model year 2012). |
| #11 | #A11 | Control module power supply | Ubat | Ubat | - |
| #12 | #A12 | Control module power supply | Ubat | Ubat | - |
| #13 | #A13 | Rain sensor, data signal | - | - | - |
| #14 | #A14 | Rear right reading lamp, signal supply | Ubat /0 V | Ubat /0 V | The signal is active when the button for the lamp is not pressed in. |
| #15 | #A15 | Rear left reading lamp, control signal | Ubat /0 V | Ubat /0 V | The signal is active when the button for the lamp is not pressed in. |
| #16 | #A16 | The front left reading lamp and general lighting, control signal | 7-9 V/0 V | 7-9 V/0 V | Active when the left front reading lamp or the general lighting is activated. |
| #17 | #A17 | The rear right reading lamp, signal supply | Ubat /0 V | Ubat /0 V | Active when the right rear reading lamp or the general lighting is activated. Pulse width modulation (PWM) signal. |
| #18 | #A18 | The front left reading lamp, signal supply | Ubat /0 V | Ubat /0 V | Pulse width modulation (PWM) signal. |
| #19 | #A19 | General lighting, signal supply | Ubat /0 V | Ubat /0 V | Pulse width modulation (PWM) signal. |
| #20 | #A20 | Signal ground | U~U=low | U~U=low | - |
| #21 | #A21 | Serial communication (Volcano lite) | 0 V-Ubat | 0 V-Ubat | The voltage is 0 V - Ubat during communication. Ubat is the default. |
| #22 | #A22 | Movement sensor (MMS) or movement sensor (IMS), (IMS replaces MMS for XC90 from and incl. model year 2012), data signal | Ubat | Ubat | Communication with both MMS or movement sensor (IMS) in XC90, (IMS replaces MMS in XC90 from and incl. model year 2012). |