Signal Description, Climate Control Module (CCM), Connector A

General

There may be several connections and connectors between the control module and components.

NOTE:

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

U=	DC voltage in volts (V)	U_AC =	AC voltage in volts (V)
U_bat =	Battery voltage (V)	f =	Frequency in Hertz (Hz)
U_low =	Voltage approximately 0 V	% duty =	Duty cycle (pulse ratio) as a percentage (%)
t =	Time in milliseconds (ms)

Fig 1: Climate Control Module Connector

Courtesy of VOLVO CARS CORPORATION

Breakout box terminal	Control module terminal	Connecting the component	Signal type	Ignition on	Engine idling	Other
#25	#A1	splice 53/437-#1 relay central electronic module (CEM)	Signal, extended X-supply	U_bat	U_bat
#26	#A2	terminal #A3 power unit	Diagnostic signal, blower fan motor	-	-
#27	#A3	#A1 power unit	Control signal, blower fan motor	0-10 mA	0-10 mA
#28	#A4	-	Signal ground	U_low	U_low
#29	#A5	-	Signal ground	U_low	U_low
#30	#A6	-	Signal ground	U_low	U_low
#31	#A7	central electronic module (CEM)	Signal, alarm LED (in). Internally directly connected to terminal #B17	1.9 V 1 Hz 10% duty	1.9 V 1 Hz 10% duty
#32	#A8	splice 53/425-fuse	30-supply, power supply climate control module (CCM)	U_bat	U_bat
#33	#A9	-	Signal ground	U_low	U_low
#34	#A10	-	Signal ground	U_low	U_low
#35	#A11	Control area network (CAN) bus terminal #19 steering wheel module (SWM)	PCCAN L1	0-5 V	0-5 V
#36	#A12	Control area network (CAN)-bus terminal #3 driver information module (DIM)	PCCAN L2	0-5 V	0-5 V
#37	#A13	Control area network (CAN) bus terminal #9 steering wheel module (SWM)	PCCAN H1	0-5 V	0-5 V
#38	#A14	Control area network (CAN)-bus terminal #2 driver information module (DIM)	PCCAN H2	0-5 V	0-5 V
#39	#A15	-	Signal ground	U_low	U_low
#40	#A16	splice 53/438-ground 2 A-post R	Power ground (measured to the battery negative terminal)	U_low	U_low