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Signal specification

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General 

Ullow , voltage close to 0 V.

UIbat , battery voltage.

NOTE:

It is important to connect the breakout box and check the ground terminals before taking readings.

Fig 1: Identifying Upper Electronic Module Connector And Terminals
GLL104034Courtesy of VOLVO CARS OF NORTH AMERICA.

Connector A:

Connector A

Control module terminal  Breakout box terminal  Signal type  Ignition on  Other 
A1 #1 30-supply (power supply from battery) Ubat -
A2 #2 Ix, index path (Speed adjustment screw) Digital signal -
A3 #3 B, reference path (Speed adjustment screw) Digital signal -
A4 #4 R1, sector (Speed adjusted screw) Digital signal -
A5 #5 A, reference path (Speed adjustment screw) Digital signal -
A6 #6 15-supply (Speed adjustment screw) (power supply from ignition switch, positions I and II) Ubat -
A7 #7 LED current 2 (Speed adjustment screw) 0-25 mA Monitors signals R1, R2, R3 and R4
A8 #8 Ground Ulow -
A9 #9 CAN H Digital signal -
A10 #10 CAN H Digital signal -
A11 #11 R3, sector (Speed adjusted screw) Digital signal -
A12 #12 LED current (Speed adjustment screw) 0-25 mA Monitors signals A, B, Ix and Iy
A13 #13 R2, sector (Speed adjusted screw) Digital signal -
A14 #14 Signal ground from Speed adjustment screw Ulow -
A15 #15 Horn Ubat Short-circuited to ground on activation
A16 #16 ground (battery) Ulow -
A17 #17 Iy, index path (Speed adjustment screw) Digital signal -
A18 #18 R4, sector (Speed adjusted screw) Digital signal -
A19 #19 CAN L Digital signal -
A20 #20 CAN L Digital signal -
A21 #21 Wiper out Digital signal -
A22 #22 ground (battery) Ulow -
Fig 2: Identifying 10 CD Changer Connector Terminals
GLL104029Courtesy of VOLVO CARS OF NORTH AMERICA.

Connector B:

Connector B (To cruise control switch)

Control module terminal  Breakout box terminal  Signal type  Ignition on  Other 
B1 #26 Synchronizing signal Synchronizing signal which starts from 12V -
B2 #27 Power supply 5 V -
B3 #28 Signal ground Ulow -
B4 #29 - - -
B5 #30 - - -