Control Module Connections

Fig 1: Identifying Control Module Connector Pins

IMPORTANT: BOB cable assemblies have not been produced for ABS 5.3, ABS 5.4 or TC/ABS 5.3. Unless otherwise stated, the test readings are those that should be obtained on the control module connector (unplugged). For TC/ABS 5.3, certain readings can be taken with the BOB cable assembly connected to the Trionic T7 control module, see .

= greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)

CONTROL MODULE CONNECTOR PINS DESCRIPTION

Pin	Cable color	Component/function	In/Out	Test conditions	Test across	Test reading	See
1	WH	Wheel sensor, RR: Reference ground	In	Rotate the wheel one turn per second	1-2	100 mV AC	Ref. to Rear-wheel sensors
2	VT	Wheel sensor, RR: Signal input	In	Rotate the wheel one turn per second	2-1	100 mV AC	Ref. to Rear-wheel sensors
3	GN	Wheel sensor, FR: Reference ground	In	Rotate the wheel one turn per second	3-5	100 mV AC	Front-wheel sensors
4		Spare
5	GY	Wheel sensor, FR: Signal input	In	Rotate the wheel one turn per second	5-3	100 mV AC	Front-wheel sensors
6	BU	Wheel sensor, FL: Reference ground	In	Rotate the wheel one turn per second	6-7	100 mV AC	Front-wheel sensors
7	VT	Wheel sensor, FL: Signal input	In	Rotate the wheel one turn per second	7-6	100 mV AC	Front-wheel sensors
8	BK	Wheel sensor, RL: Reference ground	In	Rotate the wheel one turn per second	8-9	100 mV AC	Rear-wheel sensors
9	YE	Wheel sensor, RL: Signal input	In	Rotate the wheel one turn per second	9-8	100 mV AC	Rear-wheel sensors
10		Spare
11	GN	Data link	In/Out	Tech 2 not connected	11-B-	0 V
				Tech 2 connected and TC/ABS selector for communication	11-B-	About 10 V
12		Spare
13		Spare
14	GN/GY	Brake light switch	In	Brake pedal depressed	14-B-	B+	Brake-lights switch
				Brake pedal released	14-B-	0 V
15	RD/BU	Current (+15 circuit)	In		15-B-	B+	Power supply
16	BK	Pump motor ground	In		B+-16	B+	Return pump, ABS function
17	RD	Current (+30 circuit)	In		17-B-	B+	Power supply
18	RD	Current (+30 circuit)	In		18-B-	B+	Power supply
19	BK	In		B+-19	B+	Control module ground
20		Spare
21		Spare
23	GN	Signal from wheel sensor, rear left Used by special equipment	Out	Rotate the wheel one turn per second		100 mV AC
24		Signal from wheel sensor, rear right Used by special equipment	Out	Rotate the wheel one turn per second		100 mV AC
25		Spare
26		Spare
27		Spare
28		Spare
29	WH	CAN-L		Bus information		Cannot be measured
30	GN	CAN-H		Bus information		Cannot be measured
31	PK	Switch, TCS ON/OFF	In	Switch not depressed	B+-31 0 V		Switch, TCS ON/OFF
				Switch depressed	B+-31 B+