Signal Specification

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, 2009 Volvo C70, and 2008 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

General

All values below are measured between the relevant terminal in column 1 and terminal #2F 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)	U_low =	Voltage approximately 0 V
U_bat =	Battery voltage (V)

Connector, headlamp control module (HCM)

Fig 1: Identifying Headlamp Control Module (HCM) Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Control module terminal	Signal type	Ignition on	Other
1A - H1	-	-	-
2A	Communication CAN_L high speed network	The voltage is 1.5-2.5 V during communication
2B	-	-	-
2C	Left headlamp control unit (LHCU), LIN communication	During communication the voltage is 0V - U _bat
2D	Position sensor, ground	U_low
2E	Front position sensor, signal	0.5-4.5V
2F	Power ground	U_low
2G	-	-	-
2H	-	-	-
3A	Communication CAN_H high speed network	The voltage is 2.0-3.5 V during communication
3B	Internal signal
3C	Right headlamp control unit (RHCU), LIN communication	During communication the voltage is 0V - U _bat
3D	Position sensor, voltage supply	5V
3E	Rear position sensor, signal	0.5-4.5V
3F	15-feed	U_bat
3G	-	-	-
3H	-	-	-
4A - 4H	-	-

Connector, front and rear position sensors

Fig 2: Identifying Front And Rear Position Sensor Connector Terminals

Courtesy of VOLVO CARS CORPORATION

FRONT POSITION SENSOR

Position sensor connection	Control module terminal	Signal type
1	2D	Ground
2	-	-
3	-	-
4	2E	Signal, position sensor
5	3D	Power supply, +5V
6	-	-

REAR POSITION SENSOR

Position sensor connection	Control module terminal	Signal type
1	2D	Ground
2	-	-
3	-	-
4	3E	Signal, position sensor
5	3D	Power supply, +5V
6	-	-