Signal Specification
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.
NOTE:
It is important to connect the breakout box and check the ground terminals before taking readings.
Other information
- To connect the breakout box, see CONNECTING THE BREAKOUT BOX
- To check ground terminals, see CHECKING THE GROUND TERMINAL .
| 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-#A20 The following values are measured between the relevant terminal in column 1 and terminal #E1 (power 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 close to 0 V |
| Breakout box terminal | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #A1 | #A1 | Signal (-) back-up (reversing) lamp | Ulow | Ubat | Ulow | Ubat | - |
| #A2 | #A2 | Signal, for fault-tracing the actuator motor for the left-hand xenon lamp | Ulow | Ulow | Ulow-Ubat if active, Ulow otherwise in pulse ratio (%duty) = 0-100% |
A fault is detected at 65% > pulse ratio (%duty) > 90% | |
| #A3 | #A3 | Control signal, starter motor relay | - | 0 V | 0 V | Activated with key in position III | |
| #A4 | #A4 | Signal, Hood switch | Ulow with the hood closed Ulow-Ubat with the hood open |
Pulsed signal, f=100 Hz | |||
| #A5 | #A5 | Signal (-) L-signal | Ulow | Ulow | Ubat | U~0.3-0.7*Ubat | - |
| #A6 | #A6 | Stepper motor speed related power steering (channel B) | Ulow | Ulow-Ubat | Ulow | signal for 12 ms | |
| #A7 | #A7 | Stepper motor speed related power steering (channel A) | Ulow | Ulow-Ubat | Ulow | signal for 12 ms | |
| #A8 | #A8 | Control signal relay for headlamp washing | Ulow | Ubat | Ulow | Ubat | - |
| #A9 | #A9 | Pulse width modulated signal (+) to beam adjustment unit | Ulow | Ulow-Ubat if active, Ulow otherwise Pulse ratio (% duty) > 0% |
Pulse ratio increases with increased beam width | ||
| #A10 | #A10 | - | - | - | - | ||
| #A11 | #A11 | Stepper motor speed related power steering (channel B) | Ulow | Ulow-Ubat | Ulow | signal for 12 ms | |
| #A12 | #A12 | Stepper motor speed related power steering (channel A) | Ulow | Ulow-Ubat | Ulow | signal for 12 ms | |
| #A13 | #A13 | Control signal, windshield wiper relay off/on | Ubat | Ulow | Ubat | - | |
| #A14 | #A14 | Control signal, windshield wiper high speed relay | Ubat | Ulow | Ubat | - | |
| #A15 | #A15 | Glass breakage loop, pulsed signal | 0-12 V | Ulow | Ulow | 0-12 V periodically when the car is alarmed | |
| #A16 | #A16 | Control signal, front washer motor relay | Ubat | Ulow | Ubat | - | |
| #A17 | #A17 | Control signal, rear washer motor relay | Ubat | Ulow | Ubat | (5 DRS) | |
| #A18 | #A18 | Volcano Lite | The voltage is 0 V - Ubat during communication | Serial communication | |||
| #A19 | #A19 | Control signal, horn relay | Ulow | Ubat | Ulow | Ubat | - |
| #A20 | #A20 | Signal (-), starter motor relay | Ulow | Ubat | Ulow | - | |
| Connector B, terminals #B1 - #B20 The following values are measured between the relevant terminal in column 1 and terminal #E1 (power 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 close to 0 V |
| Breakout box terminal | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #A21 | #B1 | S-supply (Power supply from ignition switch) | Ulow (Key out), Ubat (key in) | - | |||
| #A22 | #B2 | X-supply (Power supply from the ignition switch) | Ubat (Key in positions I and II); Ulow otherwise | - | |||
| #A23 | #B3 | 15-supply (Power supply from ignition switch) | Ubat (Key in positions II and III); Ulow otherwise | - | |||
| #A24 | #B4 | Stop lamp switch signal | Ubat | Ulow | Ubat | Ulow | - |
| #A25 | #B5 | Supply upper stop lamp (4 door) | Ubat | 6 V | Ubat | 6 V | - |
| #A26 | #B6 | Supply to stop lamp relay in the rear electronic module | Ulow | Ubat | Ulow | Ubat | - |
| #A27 | #B7 | Diagnostic communication (CAN H) for the high speed network | The voltage is 2.0-3.5 V during communication | - | |||
| #A28 | #B8 | Diagnostic communication (CAN_L) for the high speed network | The voltage is 1.5-2.5 V during communication | - | |||
| #A29 | #B9 | Signal (-) sensor for the front left seat belt buckle | Ulow | 0-5 V | 0-5 V | - | |
| #A30 | #B10 | Reference voltage (+) for X-supply to the left seat belt buckle | Ulow | Ubat | - | ||
| #A31 | #B11 | Serial communication the left heated seat | Ulow | During communication voltage is ~Ubat | - | ||
| #A32 | #B12 | Signal (-) contact breaker (left rear door open) | Ulow-Ubat if the door is open, Ulow otherwise | Pulsed signal, f=100 Hz. | |||
| #A33 | #B13 | Signal (-) contact breaker (left rear door locked) | Ulow if the door is locked, Ubat otherwise | - | |||
| #A34 | #B14 | Frequency signal (-) from the Engine Control Module (ECM) for the fuel pump (FP) relay | Ulow | Frequency signal U=Ulow-Ubat | f=50 HZ | ||
| #A35 | #B15 | Signal (-) from the windshield washer reservoir level sensor | Ubat if the tank is not empty, Ulow if under 1 liter. | - | |||
| #A36 | #B16 | Signal (-) from the windshield wiper motor | Ulow | Ubat | Ulow | Ubat | Ulow if the engine is running |
| #A37 | #B17 | Communication CAN_H high speed network | The voltage is 2.0-3.5 V during communication | - | |||
| #A38 | #B18 | Communication CAN_L high speed network | The voltage is 1.5-2.5 V during communication | - | |||
| #A39 | #B19 | Diagnostic communication (CAN_H) for the low speed network | The voltage is 2.0-3.5 V during communication | - | |||
| #A40 | #B20 | Diagnostic communication (CAN_L) for the low speed network | The voltage is 1.5-2.5 V during communication | - | |||
| Connector C, terminals #C1-#C20 The following values are measured between the relevant terminal in column 1 and terminal #E1 (power 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 close to 0 V |
| Breakout box terminal | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #A41 | #C1 | Reference voltage (+) for X-supply to the right seat belt buckle | Ulow | Ubat | - | ||
| #A42 | #C2 | Signal (-) sensor for the front right seat belt buckle | Ulow | 0-5 V | 0-5 V | --- | |
| #A43 | #C3 | Signal (-) contact breaker (right rear door locked) | Ulow if the door is locked, Ubat otherwise | - | - | ||
| #A44 | #C4 | Serial communication right heated seat | Ulow | During communication voltage is ~Ubat | - | - | |
| #A45 | #C5 | Signal (-) Lock unit trunk lid | Ulow-Ubat if the tailgate is open, Ulow otherwise | - | Pulsed signal, f=100 Hz. | ||
| #A46 | #C6 | Control signal, auxiliary lamp relay | - | Ubat | Ulow | Ubat | - |
| #A47 | #C7 | - | - | - | - | - | - |
| #A48 | #C8 | - | - | - | - | - | - |
| #A49 | #C9 | - | - | - | - | - | - |
| #A50 | #C10 | - | - | - | - | - | - |
| #A51 | #C11 | - | - | - | - | - | - |
| #A52 | #C12 | - | - | - | - | - | - |
| #A53 | #C13 | - | - | - | - | - | - |
| #A54 | #C14 | Signal (-) fuel pump (FP) relay switch | - | Ulow | Ubat | Ulow | - |
| #A55 | #C15 | - | - | - | - | - | - |
| #A56 | #C16 | - | - | - | - | - | - |
| #A57 | #C17 | - | - | - | - | - | - |
| #A58 | #C18 | Signal (-) contact breaker (right rear door open) | Ulow-Ubat if the door is open, Ulow otherwise | Pulsed signal, f= 100 Hz. | |||
| #A59 | #C19 | - | - | - | - | - | - |
| #A60 | #C20 | Reserve (-) | - | - | - | - | - |
| Connector D, terminals #D1-#D20 The following values are measured between the relevant terminal in column 1 and terminal #E1 (power 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 close to 0 V |
| Breakout box terminal | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #B1 | #D1 | Control signal automatic gear selector module, switch to ground | - | Ubat | Ulow | - | |
| #B2 | #D2 | Communication CAN L low speed network | The voltage is 1.5-2.5 V during communication | - | |||
| #B3 | #D3 | Communication CAN_H low speed network | The voltage is 2-3.5 V during communication | - | |||
| #B4 | #D4 | Signal (-) from control stalks (Limp Home) | Ubat | Ulow | Ubat | Ulow | - |
| #B5 | #D5 | Signal (-) from the SRS-control module (airbag OK) | Ubat for 200 ms if the airbag is triggered, Ulow if the airbag is not triggered. | - | |||
| #B6 | #D6 | Serial communication (K-line), diagnostic | The voltage is 0 V - Ubat during communication | - | |||
| #B7 | #D7 | Signal (-) contact breaker (left front door open) | Ulow-Ubat if the door is open, Ulow otherwise. | Pulsed signal, f= 100 Hz. | |||
| #B8 | #D8 | Signal (-) contact breaker (right front door open) | Ulow-Ubat if the door is open, Ulow otherwise. | Pulsed signal, f= 100 Hz. | |||
| #B9 | #D9 | Signal (-) from the gear-shift position sensor (locked in P/N) | Ulow | Ulow | Ulow | Ubat | Ulow in P and N position |
| #B10 | #D10 | Signal (+), speed (frequency signal) | Ulow | Ulow-Ubat | Frequency signal increases with speed | ||
| #B11 | #D11 | Signal, for fault-tracing the actuator motor for the right-hand xenon lamp | Ulow | Ulow | Ulow-Ubat if active, Ulow otherwise in pulse ratio (% duty) = 0-100% |
A fault is detected at 65%>pulse ratio (%duty)>90% | |
| #B12 | #D12 | Signal (-) from horn switch | Ulow | Ubat | Ulow | Ubat | - |
| #B13 | #D13 | Signal (+) data Immobilizer | Ulow | Ubat | - | ||
| #B14 | #D14 | Signal (+) Immobilizer | Ulow | Ubat | - | ||
| #B15 | #D15 | - | - | - | - | - | - |
| #B16 | #D16 | Signal (-) switch for the hazard warning signal flasher | Ulow if the button is held in, Ubat otherwise | - | |||
| #B17 | #D17 | Pulse width modulated signal (+) lamp in button for hazard warning signal flasher | Ulow-Ubat if active, Ulow otherwise Pulse ratio (% duty) > 0% |
- | |||
| #B18 | #D18 | Signal (+) glove compartment lighting | Ubat | 30 minutes after ignition off, Ulow | |||
| #B19 | #D19 | Signal (+) ignition switch illumination | Ubat | Ulow | Ubat | Ulow | - |
| #B20 | #D20 | Signal (+) Alarm indicator LED | Ulow or 0.7 V | Ulow | 0.7 V if the LED is active | ||
| Connector E, terminals #E1-#E8 The following values are measured between the relevant terminal in column 1 and terminal #E1 (power 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 close to 0 V |
| Breakout box terminal | Terminal in connector | Signal type | Ignition off | Ignition on | Other | ||
|---|---|---|---|---|---|---|---|
| - | - | - | Activated | Not activated | Activated | Not activated | - |
| #B21 | #E1 | Power ground | Ulow | - | |||
| #B22 | #E2 | Pulse width modulated signal (+) courtesy lighting | Ulow-Ubat if active, Ulow otherwise | - | - | ||
| #B23 | #E3 | 30-supply to turn signal lamps and hazard warning signal flasher | Ubat | - | - | ||
| #B24 | #E4 | - | - | - | - | - | - |
| #B25 | #E5 | - | - | - | - | - | - |
| #B26 | #E6 | 30-supply to the central electronic module (CEM) | Ubat | - | |||
| #B27 | #E7 | - | - | - | - | - | - |
| #B28 | #E8 | Pulse width modulated signal (+) to rheostat | Ulow-Ubat if active, Ulow otherwise | - | - | ||