Signal specification

General

All the values given below are between the respective terminal in column 1 and terminal #B3 in column 2 (power ground) unless otherwise stated in brackets after the table entry. Control module terminals #A1-#A60 correspond to terminals #A1-#60 on the breakout box, terminals #A61-#A70 correspond to terminals #B1-#B10 on the breakout box and terminals #B1-#B50 correspond to terminals #B10-#B60 on the breakout box.

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

HINT: If the numbering of the connector is different from the numbering on the breakout box, the connector number is given first, #A61, followed by the breakout box number in brackets, (#B1).

HINT: Example: #A51 (#B1)

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)	-	-

Terminal	Breakout box	Signal type	Ignition on	Engine idling	Other
#A1	#A1	-	-	-	-
#A2	#A2	-	-	-	-
#A3	#A3	-	-	-	-
#A4	#A4	Signal (+) engine coolant temperature (ECT) sensor	-	(+30°C) U=1.22 V (+80°C) U=0.29 V (+100°C) U=0.17 V	-
#A5	#A5	Signal (-) intake air temperature (IAT) sensor	-	(+20°C) U=3.50 V (+30°C) U=3.00 V (+40°C) U=2.50 V	-
#A6	#A6	Control signal, engine cooling fan (FC) high-speed	Engine cooling fan (FC) off: U = U_bat Engine cooling fan (FC) on: U=U_low	-	-
#A7	#A7	Control signal, engine cooling fan (FC) low-speed	Engine cooling fan (FC) off: U = U_bat Engine cooling fan (FC) on: U=U_low	-	-
#A8	#A8	-	-	-	-
#A9	#A9	EVAP control signal	U = U_bat	-	PWM signal during activation of the canister purge (CP) valve
#A10	#A10	-	-	-	-
#A11	#A11	-	-	-	-
#A12	#A12	Pulsed secondary air injection system (PAIR) valve, control signal	U = U_bat	-	-
#A13	#A13	Camshaft reset valve control signal	Pulse width modulation (PWM) signal U_top =U_bat t = 4 ms pulse ratio=12.5%	Pulse width modulation (PWM) signal U_top =U_bat t = 4 ms pulse ratio = 50%	The pulse ratio increases with engine speed (RPM)
#A14	#A14	Control signal injector 5	U = U_bat	t= 2-3 ms	t increases with engine speed (RPM) and load
#A15	#A15	Control signal injector 3	U = U_bat	t= 2-3 ms	t increases with engine speed (RPM) and load
#A16	#A16	Control signal injector 1	U = U_bat	t= 2-3 ms	t increases with engine speed (RPM) and load
#A17	#A17	-	-	-	-
#A18	#A18	Control signal, front heated oxygen sensor (HO2S) preheating	U = U_bat	Preheating of U=U_bat Preheating U=U_low	-
#A19	#A19	-	-	-	-
#A20	#A20	-	-	-	-
#A21	#A21	-	-	-	-
#A22	#A22	Mass air flow (MAF) sensor signal	U=1 volt	U=1.7 volt	U increases with increasing air mass
#A23	#A23	Boost pressure sensor signal	U=1.96 volts	-	U increases with increasing boost pressure
#A24	#A24	Front heated oxygen sensor (HO2S), pump current	Pulsed power supply - cannot be measured	Pulsed power supply - cannot be measured	-
#A25	#A25	-	-	-	-
#A26	#A26	Oil pressure switch signal	U=U_low	U = U_bat	-
#A27	#A27	-	-	-	-
#A28	#A28	Front heated oxygen sensor (HO2S), calibration current	Cannot be measured	Cannot be measured	-
#A29	#A29	Power supply, camshaft position (CMP) sensor	U =5 V	-	-
#A30	#A30	Ignition coil no. 2 control signal	U=U_low	U=2.5 V t_high =2 ms	the frequency varies according to engine speed (RPM)
#A31	#A31	Ignition coil no. 1 control signal	U=U_low	U=2.5 V t_high =2.5 ms	the frequency varies according to engine speed (RPM)
#A32	#A32	-	-	-	-
#A33	#A33	Injector no. 4 control signal	U = U_bat	t_low =2-3 ms	t increases with engine speed (RPM) and load
#A34	#A34	Injector no. 2 control signal	U = U_bat	t_low =2-3 ms	t increases with engine speed (RPM) and load
#A35	#A35	Control signal, rear heated oxygen sensor (HO2S) preheating	U = U_bat	Preheating of U=U_bat Preheating U=U_low	-
#A36	#A36	-	-	-	-
#A37	#A37	Control modules communication cable (CAN H)	-	Between the engine control module (ECM) and the throttle unit	-
#A38	#A38	Turbocharger (TC) control valve control signal	U = U_bat	U = U_bat	active U=PWM signal
#A39	#A39	Manifold absolute pressure (MAP) sensor, air conditioning (A/C) pressure sensor, mass air flow (MAF) sensor, 5 volt power supply	U=5 volt	-	-
#A40	#A40	-	-	-	-
#A41	#A41	Signal (+), front heated oxygen sensor (HO2S)	Pulsed current signal, cannot be measured	Pulsed current signal, cannot be measured	-
#A42	#A42	Signal (-), front heated oxygen sensor (HO2S)	Pulsed current signal, cannot be measured	Pulsed current signal, cannot be measured	-
#A43	#A43	-	-	-	-
#A44	#A44	-	-	-	-
#A45	#A45	Signal (+), rear knock sensor (KS)	U=U_low	-	-
#A46	#A46	Signal (+) front knock sensor (KS)	U=U_low	-	-
#A47	#A47	Signal (+), camshaft position (CMP) sensor	U=5 volts	U= quadratic wave voltage U_top =5 volts	the frequency varies according to engine speed (RPM)
#A48	#A48	Signal (+), flywheel sensor	U=2.5 volts	U= sine wave voltage U_top =5 volts U_offset =2.5 volts	-
#A49	#A49	-	-	-	-
#A50	#A50	Ignition coil no. 3 control signal	U=U_low	U= 2.5 V t_high =2 ms	the frequency varies according to engine speed (RPM)
#A51	#A51	Ignition coil no. 5 control signal	U=U_low	U= 2.5 V t_high =2 ms	the frequency varies according to engine speed (RPM)
#A52	#A52	Ignition coil no. 4 control signal	U=U_low	U= 2.5 V t_high =2 ms	the frequency varies according to engine speed (RPM)
#A53	#A53	Power ground 3	U_low	-	-
#A54	#A54	Power ground 4	U_low	-	-
#A55	#A55	Control modules communication cable (CAN L)	-	-	Between the engine control module (ECM) and the throttle unit
#A56	#A56	Control signal, accelerator pedal (AP) position sensor PWM signal	U_top =12 V t = 4 ms pulse ratio=8% 2% with unaffected accelerator pedal (AP) and 50% - 90% with fully depressed accelerator pedal (AP) On certain vehicles the accelerator pedal (AP) will be at the limit before the signal reaches 90%.	-	Between the engine control module (ECM) and the throttle unit
#A57	#A57	Stop lamp switch control signal	U=U_low (not activated) U=U_high (activated)	-	Between the engine control module (ECM) and the throttle unit
#A58	#A58	Signal ground, mass air flow (MAF) sensor	U=U_low	-	-
#A59	#A59	-	-	-	-
#A60	#A60	Signal ground for the Air conditioning (A/C) pressure sensor, boost pressure sensor, oil level sensor, oil pressure sensor, engine coolant temperature (ECT) sensor, EGR valve temperature sensor	U=U_low	-	-
#A61	#B1	Signal (+), rear heated oxygen sensor (HO2S)	U≈0.50 V	Above 0.6 or below 0.3 V	-
#A62	#B2	Signal (-), rear heated oxygen sensor (HO2S)	U=U_low	U=U_low	-
#A63	#B3	Body signal ground	U=U_low	-	-
#A64	#B4	Signal (-) front knock sensor (KS)	U=U_low	-	-
#A65	#B5	Camshaft position (CMP) sensor signal ground	U=U_low	-	-
#A66	#B6	Signal (-) flywheel sensor	U = 2.5 volt	U = sine wave voltage U_top =3.5 volts U_offset =2.5 volts	the frequency increases with engine speed (RPM)
#A67	#B7	Signal (-) rear knock sensor (KS)	U=U_low	U=U_low	-
#A68	#B8	Air conditioning (A/C) pressure sensor signal	U=0.9 V (at approximately 20°C)	-	U increases with pressure in the air conditioning (A/C) system
#A69	#B9	-	-	-	-
#A70	#B10	Power supply	U = U_bat	-	Measured via the system relay

Terminal	Breakout box	Signal type	Ignition on	Engine idling	Other
#B1	#B11	Control modules communication cable (CAN L)	-	-	Data communication, high speed network
#B2	#B12	-	-	-	-
#B3	#B13	-	-	-	-
#B4	#B14	Signal ground for the intake air temperature (IAT) sensor, fuel tank pressure sensor, fuel level sensor, clutch pedal sensor, brake pedal sensor	U=U_low	-	-
#B5	#B15	Signal ground, accelerator pedal (AP) position sensor	U=U_low	-	-
#B6	#B16	-	-	-	-
#B7	#B17	-	-	-	-
#B8	#B18	Signal (+), coolant level sensor	U=U_low	-	-
#B9	#B19	Accelerator pedal (AP) position sensor power supply, analog sensor	U =5 V	-	-
#B10	#B20	Fuel tank pressure sensor power supply	U =5 V	-	-
#B11	#B21	30-supply (Power supply from the battery)	U = U_bat	-	-
#B12	#B22	-	-	-	-
#B13	#B23	Control module communication cable (CAN H)	-	-	Data communication, high speed network
#B14	#B24	-	-	-	-
#B15	#B25	Clutch pedal sensor signal	U=3.3 V (unaffected) U=2.2 V (fully depressed, 100 mm)	-	Varies according to the position of the clutch pedal
#B16	#B26	Brake pedal sensor signal	U=3.1 V (unaffected) U=2.6 V (25 mm depressed)	-	Varies according to the position of the brake pedal
#B17	#B27	Accelerator pedal (AP) position sensor signal, analog signal	U = 0.4 0.1 V with unaffected accelerator pedal (AP) U=2.5-4.4 V = the accelerator pedal (AP) fully depressed On certain vehicles the accelerator pedal (AP) will be at the limit position before the signal reaches 4.4 V.	-	Varies according to the position of the accelerator pedal (AP)
#B18	#B28	-	-	-	-
#B19	#B29	Cruise control signal (+)	See terminal #B47	-	-
#B20	#B30	Cruise control signal (+)	See terminal #B47	-	-
#B21	#B31	Output signal (+), engine speed (RPM)	U=U_low	U = quadratic wave voltage U_top =Ubat	frequency increases with engine speed (RPM)
#B22	#B32	Diagnostic lead communication link/Communication cable Immobilizer	U=90% of U_bat	Other values apply if a generic fault-tracing instrument is connected to the data link connector (DLC)	The communication cable functions both as a communication link and as a start inhibition link (immobilizer)
#B23	#B33	Signal (+) crank, terminal 50	U=U_low	U=U_low	U=U_bat at the crank
#B24	#B34	-	-	-	-
#B25	#B35	Signal (+) accelerator pedal (AP) position sensor, PWM signal	U_top =12 V t = 4 ms pulse ratio=8% 2% with unaffected accelerator pedal (AP) and 50% - 90% with fully depressed accelerator pedal (AP) On certain vehicles the accelerator pedal (AP) will be at the limit before the signal reaches 90%.	-	Between the accelerator pedal (AP) position sensor and the engine control module (ECM)
#B26	#B36	Signal (+), stop lamp switch	U=U_bat when the brake pedal is affected U=U_low when the brake pedal is unaffected	-	-
#B27	#B37	Engine coolant temperature output signal to the A/C system	U_top =U_bat t = 4 ms pulse ratio = varies according to the engine temperature	-	-
#B28	#B38	-	-	-	-
#B29	#B39	Outside temperature sensor signal	(0°C) U = 2.92 V (+10°C) U = 2.40 V (+20°C) U = 1.90 V (+30°C) U = 1.46 V	-	Temperature range: -40°C to +30°C
#B30	#B40	-	-	-	-
#B31	#B41	Fuel tank pressure sensor signal	U=2.5 V at 1 kPa U=3.3 V at atmospheric pressure (0 kPa overpressure) U=4.1 V at 1 kPa overpressure	-	-
#B32	#B42	Air conditioning (A/C) request signal	U=U_bat during request U=U_low when there is no request	-	-
#B33	#B43	Cruise control on/off signal	See terminal #B47	-	-
#B34	#B44	Cruise control signal -	See terminal #B47	-	-
#B35	#B45	-	-	-	-
#B36	#B46	-	-	-	-
#B37	#B47	Ignition on signal, terminal 15	U = U_bat	-	-
#B38	#B48	System relay, control signal	U=U_low	U=U_low	Relay activated: U=U_low Relay not activated: U = U_bat the system relay runs on (2-5 minutes)
#B39	#B49	-	-	-	-
#B40	#B50	EVAP canister shut-off valve control signal	U=3.82 volts	-	-
#B41	#B51	Electronic throttle system (ETS) warning lamp control signal	U=U_low	U=U_bat (not activated) U=U_low (activated)	-
#B42	#B52	-	-	-	-
#B43	#B53	-	-	-	-
#B44	#B54	Air conditioning (A/C) activation control signal	U=U_bat (not activated) U=U_low (activated)	-	-
#B45	#B55	Fuel pump (FP) activation control signal	-	-	control signal to the fuel pump (FP) relay
#B46	#B56	Malfunction indicator lamp (MIL) control signal	U=U_low	U=U_bat (not activated) U=U_low (activated)	-
#B47	#B57	Cruise control power supply	U=U^bat (not activated) U = pulse train U^top =U^bat t=20 ms t^high =0.5 ms	-	-
#B48	#B58	Control signal for engine start inhibiting	U=U_low (activated) U=U_high (not activated)	-	in certain markets, the engine can only be started with the clutch pedal depressed (U=U_low )
#B49	#B59	-	-	-	-
#B50	#B60	-	-	-	-