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Home >> Volvo >> 2009 >> XC70 Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Vehicle Module, Closing Velocity Module, Forward Sensing Module, And Parking Assistance Module - Specifications, Electrical/Electronic >> Signal Specification, Forward Sensing Module (FSM) (2008-2011) >> Signal Specification
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Signal Specification

General 

All the values given below are between the respective terminal in column 1 and terminal #C1:12 in column 2 (power ground) unless otherwise stated in parenthesis after the table entry.

NOTE:

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

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 t = Time in seconds
PWM = Pulse width modulated signal as a %    
Fig 1: Identifying Forward Sensing Module (FSM) Connector
GLL153787Courtesy of VOLVO CARS CORPORATION
SIGNAL TABLE

Breakout box terminal  Control module terminal  Signal type  Ignition off Active/Inactive  Ignition on Active/Inactive  Other 
#1 #C1:1 - - -  
#2 #C1:2 Local CAN bus FLR, low signal 1.5 - 2.5 V 1.5 - 2.5 V During communication
#3 #C1:3 Local CAN bus FLR, high signal 2.5 - 3.5V 2.5 - 3.5V During communication
#4 #C1:4 - - -  
#5 #C1:5 - - -  
#6 #C1:6 - - -  
#7 #C1:7 - - -  
#8 #C1:8 Communication CAN_L high speed network During communication the voltage is 1.5 - 2.5 V  
#9 #C1:9 Communication CAN_H high speed network During communication the voltage is 2.0 - 3.5V  
#10 #C1:10 Visual indicator, collision warning terminal C1:3, power supply U=0.2 - 5.0V/Ulow U=0.2 - 5.0V/Ulow Output, PWM signal
#11 #C1:11 Visual indicator, collision warning terminal C1:2, power supply U=0.2 - 5.0V/Ulow U=0.2 - 5.0V/Ulow Output, PWM signal
#12 #C1:12 Power ground U low /Ulow U low /Ulow  
#13 #C1:13 Visual indicator, collision warning terminal C1:1, power supply U=0.2 - 5.0V/Ulow U=0.2 - 5.0V/Ulow Output, PWM signal
#14 #C1:14 15-feed U low /Ulow Ulow / Ubat  
#15 #C1:15 Power supply Ulow / Ubat Ulow / Ubat Via interior lighting relay, CEM
#16 #C1:16 - - -  
#17 #C1:17 - - -  
#18 #C1:18 - - -  
#19 #C1:19 - - -  
#20 #C1:20 - - -  
#21 #C1:21 - - -  
#22 #C1:22 - - -  
#23 #C1:23 - - -  
#24 #C1:24 - - -  
#25 #C1:25 - - -  
#26 #C1:26 - - -  
#27 #C1:27 Visual indicator, collision warning terminal C1:4, signal ground U low >/Ulow U low /Ulow  
#28 #C1:28 - - -  
#29 #C1:29 - - -  
#30 #C1:30 - - -