Signal specification, engine control module (ECM)

All values below are measured between the relevant terminal in column 2 and #Axx (#Axx on the breakout box). (Stated in brackets after the table entry if not).

Connector A (96-pin) corresponds to terminals #A1 - #B36 on the breakout box.

Connector B (58-pin engine side) corresponds to terminals #C1 - #58 on the breakout box.

NOTE:

Connect the breakout box and check the ground terminals before taking readings.

Connector A

Breakout box terminal	Control module terminal	Signal type	Ignition on	Engine idling	Other
#A1	#A1	Injector no. 1, control signal high	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A2	#A2	Injector no. 4, control signal high	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A3	#A3	Injector no. 3, control signal high	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A4	#A4	Swirl throttle motor, signal (-)	U=U low	-	Control signal, H-bridge, .
#A5	#A5	Swirl throttle motor, signal (+)	U=U low	-	Control signal, H-bridge, .
#A6	#A6	Heated oxygen sensor, current regulation	U= approx. 3 V	U=approx. 3 V
#A7	#A7	Camshaft position sensor, power supply 5 V	U=5 V	U=5 V
#A8	#A8	Temperature sensor, particle trap, signal ground	U=U low	U=U low	GND
#A9	#A9	Turbo regulator motor (VNT), signal ground	U=U low	U=U low	GND
#A10	#A10	Camshaft position (CMP) sensor, signal ground	U=U low	U=U low	GND
#A11	#A11	Throttle position sensor, signal	U=U low	U=approx. 0-5 V	Analog input (feedback).
#A12	#A12	-	-	-
#A13	#A13	-	-	-
#A14	#A14	-	-	-
#A15	#A15	Intake temperature and pressure sensor (TMAP), power supply 5 V	U=5 V	U=5 V	.
#A16	#A16	-	-	-
#A17	#A17	-	-	-
#A18	#A18	Throttle position sensor (throttle unit), power supply 5 V	U=5 V	U=5 V
#A19	#A19	Fuel pressure sensor, power supply 5 V	U=5 V	U=5 V
#A20	#A20	-	-	-
#A21	#A21	Turbo regulator motor (VNT), signal	PWM (0-12 V)	PWM (0-12 V)	Digital output, PWM
#A22	#A22	-	-	-
#A23	#A23	Fuel pressure control valve (DRV2), power supply 12 V	U = U bat	U = U bat
#A24	#A24	Throttle motor, intake, control signal (-)	U=U low	-	Digital output.
#A25	#A25	Injector no. 2, control signal high	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A26	#A26	Injector no. 5, control signal high	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A27	#A27	-	-	-
#A28	#A28	EGR control, signal ground	U=U low	U=U low	GND
#A29	#A29	Mass air flow (MAF) sensor, signal ground	U=U low	U=U low	GND,
#A30	#A30	-	-	-
#A31	#A31	Heated oxygen sensor, signal	Saw tooth shaped (U=approx. 2-4 V)	Saw tooth shaped (U=approx. 2-4 V)	Analog input
#A32	#A32	Glow plug control, signal	U=0-12 V	U=0-12 V	Digital output.
#A33	#A33	Camshaft position sensor, signal	U=5 V	Square wave (U=0-5 V), approx. 5.8 Hz when idling.	Digital input. Frequency increases as engine speed increases.
#A34	#A34	Oil level/temperature sensor, signal	PWM (0-5 V)	PWM (0-5 V)
#A35	#A35	-	-	-
#A36	#A36	Oil level/temperature sensor, signal ground	U=U low	U=U low	GND
#A37	#A37	Glow plug control, signal ground	U=U low	U=U low	GND
#A38	#A38	-	-	-
#A39	#A39	-	-	-
#A40	#A40	Swirl throttle position sensor, power supply 5 V	U=5 V	U=5 V
#A41	#A41	Differential pressure sensor, particle trap, power supply 5 V	U=5 V	U=5 V
#A42	#A42	Oil level/temperature sensor, power supply 5 V	U=5 V	U=5 V
#A43	#A43	AC high pressure sensor, power supply 5 V	U=5 V	U=5 V
#A44	#A44	Differential pressure sensor, particle trap, signal	U=0-5 V	U=0-5 V	Analog input
#A45	#A45	-	-	-
#A46	#A46	Vacuum valves, engine mounting, signal	U=U low	U=0-12 V	Digital output.
#A47	#A47	Fuel flow control valve (MPROP), power supply 12 V	U = U bat	U = U bat
#A48	#A48	Heated oxygen sensor, signal	U = U bat	PWM (0-12 V)	Digital output
#A49	#A49	Injector no. 5, control signal low	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A50	#A50	Injector no. 1, control signal low	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#A51	#A51	-	-	-
#A52	#A52	Position sensor, swirl throttle, signal ground	U=U low	U=U low
#A53	#A53	Impulse sensor, signal (-)	U= approx. 2.5 V	U= sinus voltage (approx. 0.1-100 V)	Digital input. Voltage and frequency increase as engine speed increases.
#A54	#A54	-	-	-
#A55	#A55	-	-	-
#A56	#A56	Coolant temperature sensor (engine temperature sensor), signal ground	U=U low	U=U low	GND
#A57	#A57	Heated oxygen sensor, virtual ground, signal ground	U= approx. 2.5 V	U= approx. 2.5 V
#A58	#A58	Temperature sensor particle trap, signal	U=U low	U=0-5 V	Analog input
#A59	#A59	Air temperature sensor in mass air flow (MAF) sensor, signal	PWM (0-5 V)	PWM (0-5 V)	Digital input
#A60	#A60	Coolant temperature sensor (engine temperature sensor), signal	U=0-5 V	U=0-5 V	Analog input
#B1	#A61	Fuel temperature sensor, signal	U=0-5 V	U=0-5 V	Analog input
#B2	#A62	Temperature sensor, catalytic converter, signal ground	U=U low	U=U low	GND
#B3	#A63	Differential pressure sensor, particle trap, signal ground	U=U low	U=U low	GND
#B4	#A64	Fuel pressure sensor, signal ground	U=U low	U=U low	GND
#B5	#A65	Fuel pressure sensor, signal	U= approx. 0.5 V	U=0.5-5 V	Analog input
#B6	#A66	EGR valve position sensor, signal	PWM (0-5 V)	PWM (0-5 V)	Digital input (feedback)
#B7	#A67	Throttle position sensor, signal ground	U=U low	U=U low	GND
#B8	#A68	-	-	-
#B9	#A69	-	-	-
#B10	#A70	-	-	-
#B11	#A71	EGR control, signal	PWM (0-12 V)	PWM (0-12 V)	Digital output
#B12	#A72	Throttle unit motor, signal	PWM (0-12 V)	PWM (0-12 V)	H-bridge
#B13	#A73	Injector no. 4, control signal low	U=approx. 0.5-22 V	-	t increases with engine speed and load. Bank 1
#B14	#A74	Injector no. 3, control signal low	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#B15	#A75	Injector no. 2, control signal low	U=approx. 0.5-22 V	-	t increases with engine speed and load.
#B16	#A76	AC high pressure sensor, signal ground	U=U low	U=U low	GND
#B17	#A77	Impulse sensor, signal (+)	U=2.5 V	U= sinus voltage (approx. 0.1-100 V)	Digital input. Voltage and frequency increase as engine speed increases.
#B18	#A78	Fuel temperature sensor, signal ground	U=U low	U=U low	GND
#B19	#A79	AC high pressure sensor, signal	U=0-5 V	U=0-5 V	Analog input
#B20	#A80	Heated oxygen sensor, flow pump	U=approx. 3 V	U=approx. 3 V	Analog input
#B21	#A81	Position sensor, swirl throttle, signal	U= approx. 0.5-4.5 V	U= approx. 0.5-4.5 V	Analog input
#B22	#A82	Boost pressure sensor (TMAP), signal	U=0-5 V	U=0-5 V	Analog input
#B23	#A83	-	-	-
#B24	#A84	Temperature sensor, catalytic converter, signal	U= approx. 0.5-2.5 V	U= approx. 0.5-2.5 V	Analog input
#B25	#A85	Intake air temperature sensor (TMAP), signal	U= approx. 0.5-4.5 V	U= approx. 0.5-4.5 V	Analog input
#B26	#A86	Mass air flow (MAF) sensor, signal	Square wave (0-5 V)	Square wave (0-5 V)	Digital input. Frequency varies based on air mass.
#B27	#A87	Boost pressure sensor (TMAP), signal ground	U=U low	U=U low	GND
#B28	#A88	LIN bus	0-12 V	0-12 V	Digital communication
#B29	#A89	-	-	-
#B30	#A90	Glow plug relay, diagnostic signal	U=approx. 9 V	U=0-12 V	Digital input
#B31	#A91	-	-	-
#B32	#A92	Bypass valve, EGR cooling, signal	U=U low	PWM (0-5 V)	Digital output. Certain variants only.
#B33	#A93	Fuel pressure control valve (DRV2), signal	PWM (0-12 V)	PWM (0-12 V)	Digital output
#B34	#A94	Fuel flow control valve (MPROP), signal	PWM (0-12 V)	PWM (0-12 V)	Digital output
#B35	#A95	-	-	-
#B36	#A96	-	-	-

Connector B

Breakout box terminal	Control module terminal	Signal type	Ignition on	Idling	Other
#C1	#B1	Power supply from system relay 12 V	U = U bat	U = U bat	Power supply from system relay (Mprop, DRV2 and swirl).
#C2	#B2	Power ground 1	U=U low	U=U low	GND
#C3	#B3	Power supply from system relay 12 V	U = U bat	U = U bat	Power supply from system relay (throttle motor and freewheel diodes).
#C4	#B4	Power ground 2	U=U low	U=U low	GND
#C5	#B5	Power supply downstream of system relay 12 V	U = U bat	U = U bat	Power supply downstream of system relay (Engine Control Module (ECM) and injector).
#C6	#B6	Power ground 3	U=U low	U=U low	GND
#C7	#B7	Accelerator pedal position sensor, signal ground	U=U low	U=U low	GND
#C8	#B8	-	-	-
#C9	#B9	-	-	-
#C10	#B10	-	-	-
#C11	#B11	-	-	-
#C12	#B12	Clutch pedal position sensor, signal	U=0-5 V	U=0-5 V	Analog input.
#C13	#B13	-	-	-
#C14	#B14	-	-	-
#C15	#B15	Accelerator pedal position sensor, power supply 5 V	U=5 V	U=5 V
#C16	#B16	-	-	-
#C17	#B17	-	-	-
#C18	#B18	-	-	-
#C19	#B19	-	-	-
#C20	#B20	-	-	-
#C21	#B21	-	-	-
#C22	#B22	HS-CAN high	U=2.5-3.75 V	U=2.5-3.75 V	Digital communication
#C23	#B23	HS-CAN low	U=1.25-2.5 V	U=1.25-2.5 V	Digital communication
#C24	#B24	Accelerator pedal position sensor, analog signal	U=0-5 V	U=0-5 V	Analog input. The value increases upon accelerator pedal actuation.
#C25	#B25	-	-	-
#C26	#B26	-	-	-
#C27	#B27	-	-	-
#C28	#B28	-	-	-
#C29	#B29	Starter relay	U = U bat	U = U bat	Digital output
#C30	#B30	-	-	-
#C31	#B31	-	-	-
#C32	#B32	AC relay, signal	U = U bat	U=0-12 V	Digital output.
#C33	#B33	Start signal from ignition switch (50)	U=U low	U=U low	Digital input
#C34	#B34	Gear position sensor (P/N), signal	U=U low	U=U low	Digital input. The value increases in gear position P/N.
#C35	#B35	Engine coolant level sensor, signal	U=0-12 V	U=0-12 V	Digital input. U=0 V when coolant level is normal.
#C36	#B36	-	-	-
#C37	#B37		U=0-5 V	U=0-5 V	Digital output.
#C38	#B38	, signal	U = U bat	U = U bat	Digital input
#C39	#B39	-	-	-
#C40	#B40	Clutch pedal position sensor, signal ground	U=U low	U=U low	GND
#C41	#B41	15-feed from ignition switch	U = U bat	U = U bat
#C42	#B42	System relay, signal	U=U low	U=U low	Digital output
#C43	#B43	-	-	-
#C44	#B44	Starter relay	U = U bat	U = U bat	Digital output
#C45	#B45	-	-	-
#C46	#B46	-	-	-
#C47	#B47	Accelerator pedal position sensor, signal	PWM (0-12 V)	PWM (0-12 V)	Digital input, PWM
#C48	#B48	Stop lamp switch	U=0-12 V	U=0-12 V	Digital input. U=0 V if brake pedal is not actuated.
#C49	#B49	-	-	-
#C50	#B50	-	-	-
#C51	#B51	-	-	-
#C52	#B52	-	-	-
#C53	#B53	-	-	-
#C54	#B54	-	-	-
#C55	#B55	-	-	-
#C56	#B56	-	-	-
#C57	#B57	-	-	-
#C58	#B58	Engine cooling fan (FC), control signal	PWM (0-12 V)	PWM (0-12 V)	PWM, digital output