Signal specification
Connector B2, 26 pin
All the values given below are between the terminal stated in column 1 and terminal #A1 (ground).
The terminals in the central electronic module (CEM) connector B2 correspond to terminals A1-26 on the breakout box.
CAUTION:
It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
U = DC in volts (V)
U bat = battery voltage
U low = voltage near 0 V or 0 V
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #A1 | B2#1 | Signal ground, control module | Ulow | - |
| #A2 | B2#2 | Windshield wiper, intermittent wiper switch | Intermittent position: Ubat Other positions: Ulow |
- |
| #A3 | B2#3 | High beam flash, input signal | Activated: Ulow Not activated: Ubat |
Grounded when the high beam switch is activated |
| #A4 | B2#4 | High/low beam switch, input signal | Activated: Ulow Not activated: U approximately 4.5 V |
Grounded when the switch is activated The signal displays if high/low beam is activated |
| #A5 | B2#5 | Warning lamp, bulb failure warning sensor, output signal | Lamp lit: U approximately 0.75 V Lamp not lit: Ubat |
The warning lamp is grounded by the central electronic module |
| #A6 | B2#6 | Not used | - | - |
| #A7 | B2#7 | Diagnostic lead C-link, Volvo on-board diagnostic (OBD) system | Diagnostic link | - |
| #A8 | B2#8 | Not used | - | - |
| #A9 | B2#9 | Not used | - | - |
| #A10 | B2 #10 | Not used | - | - |
| #A11 | B2 #11 | Tailgate wiper, output signal | Activated wiper: Ubat Parked wiper: Ulow |
Ubat when the intermittent wiper relay in the central electronic module is activated |
| #A12 | B2 #12 | Windshield wiper, parking position switch, input signal | Activated wiper: Ubat Parked wiper: Ulow |
- |
| #A13 | B2 #13 | Windshield wiper, output signal | Activated wiper: Ubat Parked wiper: Ulow |
Ubat when the intermittent wiper relay in the central electronic module is activated |
| #A14 | B2 #14 | Switch, windshield washer, input signal | Activated switch: Ubat Switch not activated: Ulow |
- |
| #A15 | B2 #15 | Windshield washer motor, output signal | Activated washer: Ubat Washer not activated: Ulow |
- |
| #A16 | B2 #16 | Speed signal, input signal | Pulsed signal: U approximately 0.5-11 V | The frequency increases with speed |
| #A17 | B2 #17 | Not used | - | - |
| #A18 | B2 #18 | Not used | - | - |
| #A19 | B2 #19 | Not used | - | - |
| #A20 | B2 #20 | Not used | - | - |
| #A21 | B2 #21 | Not used | - | - |
| #A22 | B2 #22 | Lighting for the cigarette lighter etc. output signal | Pulsed signal between approximately Ulow - 11.0 V The pulse ratio depends on the position of the rheostat |
Low pulse ratio: Reduced lighting |
| #A23 | B2 #23 | Lighting for the radio, output signal | Pulsed signal between approximately Ulow - 11.0 V The pulse ratio depends on the position of the rheostat |
Low pulse ratio: Reduced lighting |
| #A24 (model year -2001) |
B2 #24 | Switch, tailgate wiper, input signal | Activated switch: Ubat Switch not activated: Ulow |
- |
| #A24 (model year 2002- |
B2 #24 | Switch, tailgate wiper, input signal | Position interval: Ubat Position Off: Ulow |
- |
| #A25 | B2 #25 | Not used | - | - |
| #A26 | B2 #26 | Tailgate wiper, parking position switch, output signal | Ubat | - |
Connector B1, 12 pin
All the values given below are between the terminal stated in column 1 and terminal #A1 (ground).
The terminals in the central electronic module (CEM) connector B1 correspond to terminals A31-42 on the breakout box.
CAUTION:
It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
U = DC in volts (V)
U bat = battery voltage
U low = voltage near 0 V or 0 V
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #A31 | B1#1 | 15/1-supply | Ubat | - |
| #A32 | B1#2 | Tail lamps | Tail lamps lit: Ubat Tail lamps off: Ulow |
- |
| #A33 | B1#3 | Stop lamp switch, input signal | Activated: Ubat Not activated: Ulow |
- |
| #A34 | B1#4 | Stop lamp switch, output signal to automatic transmission etc. | Activated: Ubat Not activated: Ulow |
- |
| #A35 | B1#5 | Stop lamp switch, output signal to cruise control | Activated: Ubat Not activated: Ulow |
- |
| #A36 | B1#6 | Stop lamp switch, output signal to stop lamp bulbs | Activated: Ubat Not activated: Ulow |
- |
| #A37 | B1#7 | Not used | - | - |
| #A38 | B1#8 | Back-up (reversing) lamp switch, input signal | Activated: Ubat Not activated: Ulow |
- |
| #A39 | B1#9 | Back-up (reversing) lamp, output signal | Activated back-up (reversing) lamp switch: Ubat Back-up (reversing) lamp switch not activated: Ulow |
The back-up (reversing) lamps light when the back-up (reversing) lamp switch is activated |
| #A40 | B1#10 | High-mounted stop lamp, output signal | Activated stop lamp switch: Ubat Stop lamp switch not activated: Ulow |
- |
| #A41 | B1#11 | Rear fog lamps, output signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #A42 | B1#12 | Switch, tailgate washer, input signal | Activated washer: Ubat Washer not activated: Ulow |
- |
Connector F, 16 pin
All the values given below are between the terminal stated in column 1 and terminal #A1 (ground).
The terminals in the central electronic module (CEM) connector F correspond to terminals B1-16 on the breakout box.
CAUTION:
It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
U = DC in volts (V)
U bat = battery voltage
U low = voltage near 0 V or 0 V
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #B1 | F#1 | Stop lamp switch, output signal to ABS | Activated: Ubat Not activated: Ulow |
- |
| #B2 | F#2 | Front side marker lamps, output signal | Activated lighting: Ubat Lighting not activated: Ulow |
- |
| #B3 | F#3 | Left low beam, 30-supply from fuse | Ubat | - |
| #B4 | F#4 | Left low beam, output signal | Activated low beam: Ubat Low beam not activated: Ulow |
- |
| #B5 | F#5 | Left high beam, output signal | Activated high beam: Ubat High beam not activated: Ulow |
- |
| #B6 | F#6 | High beam, 30-supply from the fuse | Ubat | - |
| #B7 | F#7 | Fog lamp, 30-supply from the fuse | Ubat | - |
| #B8 | F#8 | Tail lamp, 30-supply from the fuse | Ubat | - |
| #B9 | F#9 | Tailgate washer, output signal | Activated washer: Ubat Washer not activated: Ulow |
- |
| #B10 | F#10 | 75-supply from the fuse | Ubat | - |
| #B11 | F#11 | Parking lamp, 30-supply from the fuse | Ubat | - |
| #B12 | F#12 | Right low beam, output signal | Activated low beam: Ubat Low beam not activated: Ulow |
- |
| #B13 | F#13 | Right low beam, 30-supply from the fuse | Ubat | - |
| #B14 | F#14 | Right high beam, output signal | Activated high beam: Ubat High beam not activated: Ulow |
- |
| #B15 | F#15 | Right front fog lamp, output signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #B16 | F#16 | Left front fog lamp, output signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
See F#15 |
Connector P, 18 pin
All the values given below are between the terminal stated in column 1 and terminal #A1 (ground).
The terminals in the central electronic module (CEM) connector P correspond to terminals B21-38 on the breakout box.
CAUTION:
It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.
U = DC in volts (V)
U bat = battery voltage
U low = voltage near 0 V or 0 V
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #B21 | P#1 | Front fog lamps, output signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #B22 | P#2 | Not used | - | - |
| #B23 Model year -2001 |
P#3 | Not used | - | - |
| #B23 Model year 2002- |
P#3 | Switch, tailgate wiper, input signal | Position On: Ubat Position Off: Ulow |
- |
| #B24 | P#4 | Switch, rear fog lamps, input signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #B25 | P#5 | Parking lamps, output signal | Activated parking lamps: Ubat Parking lamps not activated: Ulow |
- |
| #B26 | P#6 | Lighting switch, output signal | Activated lighting: Ubat Lighting not activated: Ulow |
- |
| #B27 | P#7 | 15/2-supply | Ubat | - |
| #B28 | P#8 | Rheostat, input signal | Pulsed signal, fixed pulse ratio. Rheostat in maximum position: U approximately Ulow - 3.5 V Rheostat in minimum position: Ulow |
- |
| #B29 | P#9 | Auxiliary lamps, output signal | Activated high beam: Ubat High beam not activated: Ulow |
- |
| #B30 | P#10 | High beam warning lamp, output signal | Activated high beam: Ubat High beam not activated: Ulow |
- |
| #B31 | P#11 | Not used | - | - |
| #B32 | P#12 | Switch, front fog lamps, input signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #B33 | P#13 | Rear fog lamps, output signal | Activated fog lamps: Ubat Fog lamps not activated: Ulow |
The lighting must be on before the fog lamps can be activated |
| #B34 | P#14 | Instrument lighting, output signal | Pulsed signal between approximately Ulow - 11.0 V The pulse ratio depends on the position of the rheostat |
Low pulse ratio: Reduced lighting |
| #B35 | P #15 | Lighting in the info center, output signal | Pulsed signal between approximately Ulow - 11.0 V The pulse ratio depends on the position of the rheostat |
Low pulse ratio: Reduced lighting |
| #B36 | P #16 | Lighting switch, output signal | Ulow | - |
| #B37 | P #17 | Lighting switch, input signal | Lighting switch in position 0: Ulow Lighting switch in position 2: U approximately 4.5 V |
- |
| #B38 | P#18 | Lighting switch, input signal | Lighting switch in position 0: U approximately 4.5 V Lighting switch in position 2: Ulow |
- |