Engine Electrical System Specifications (Mercedes-Benz S-Class W140)

Contents: Starter ↡ Generator ↡ Ignition system ↡ Diesel Engine Management System ↡ List of fault codes for various…↡ OBD II 2nd Generation On-Board…↡ Tightening force of threaded…↡

Note: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold.

Battery, RC/Ah
S280, S320	175/92
S300 TDI, S420, S500, S600	180/100

Starter

Type
S280, S320	Bosch 0 001 110 091
S300 TDI	Bosch 0 001 218 156
Maximum current, A
S280, S320	248-304
S300 TDI, S420, S500, S600	270-330

Generator

Type
S280, S320	Bosch 0 123 510 002
S300 TDI	Bosch 0 120 468 059
Output current/voltage/at engine speed
S280, S320	120A/14V/2200
S300 TDI	80A/14V/2200
S420, S500, S600	143A/14B/1950
Adjustable voltage, V	13.0-14.5

[Original material on the website MercedesMan.ru]

Ignition system

Type
S280 S320	Map-DIS Motronic
S 420, S500, S600	Map-DI ME 1.0
Cylinder firing order
S280, S320, S300	TDI 1-5-3-6-2-4
S420, S500	1-5-4-8-6-3-7-2
S600	1-12-5-8-3-10-6-7-2-11-4-9
Engine control unit
S280, S320	Bosch 0 261 200 422
S300 TDI
Ignition coil
S280, S320	Bosch 0 221 506 444
Primary winding resistance
S280, S320	0.3 - 0.6 Ohm
Secondary winding resistance
S280, S320	5.2 - 8.5 kOhm
Spark plug type
S280, S320	Bosch F8DCO, Champion C10YCC, NGK BCP6ES
S420, S500, S600 NGK BCP6ES	Bosch F8DCO, Autolite 3923, Bosch F8DC4, Champion C11YCC,
Spark plug gap, mm	0.8

Diesel Engine Management System

Type	Electronic with direct injection from the common rail "Common-Rail", turbocharging and aftercooling
Glow plug type	Beru 858 MJ, Bosch 0 250 201 026, Lucas/CAV HDS352
Control lamp malfunction Indicator (MIL)	Flashes when there are misfires, lights up constantly when there are other malfunctions in the control system

List of fault codes for various engine control units used in Mercedes

Bosch systems KE3.1-Jetronic, KE3.5-Jetronic, KE5.2-Jetronic, LH4.1-Jetronic

Duty Cycle	Malfunction
0%	Lambda probe or its circuit.
0%	Diagnostic connector (for vehicles without catalytic converter).
10%	Throttle potentiometer or its circuit.
20%	Throttle potentiometer or its circuit.
30%	Coolant temperature sensor or its circuit.
40%	Air flow sensor or its circuit.
50%	Oxygen sensor signal (for vehicles with catalytic converter).
50%	Input signals are normal.
60%	Input signals are normal.
60%	Camshaft position sensor or its circuit.
70%	Speedometer sensor signal.
80%	Air temperature sensor or its circuit.
80%	Atmospheric pressure sensor or its circuit (KEZ.5).
80%	Drive mode is enabled (KE5 2).
80%	CAN signal (LH4.1) - connection between system units.
90%	Pressure regulator (KE5.2).
90%	The emergency fuel cut-off system (LH4.1) is activated.
100%	Lambda probe or its circuit.
100%	ECM (for vehicles without catalytic converter).

Bosch LH4.1 System

Main module

Number of flashes	Malfunction
1	No faults.
5	Module overheating.
6	Locking of the electromagnetic clutch of the air conditioning compressor.
7	V-belt slippage.
9	No power to ECM (N3/1).
10	No power to ECM (N3/1).
11	There is no power supply to the auxiliary equipment control units.
12	Incorrect supply voltage to the ABS (N30) or ABS/ASR (N30/1) control unit.
12	Automatic differential lock control unit (N30/2) (additional code) AT.
15	No power supply to the downshift valve (Y3) for AT
16	There is no power supply to the electromagnetic clutch of the air conditioner (A9K1).
17	There is no power supply to the electric motor of the control module fan (M2/2).

Diagnostic module

Quantity flashes	Malfunction
1	No faults.
2	Lambda probe or its circuit.
3	Lambda probe or its circuit.
4	Secondary air intake system malfunction.
5	Exhaust gas recirculation valve or.
6	Idle air control valve or its circuit.
7	Ignition system malfunction.
8	Coolant temperature sensor or its circuit (open or short circuit).
9	Air temperature sensor or its circuit (open or short circuit).
10	Air flow sensor or its circuit (voltage too high or low).
11	The tachometer signal does not correspond to reality.
12	Lambda probe or its circuit (open or short circuit).
13	The camshaft position sensor signal is not correct (or a malfunction of its circuit).
14	Variable intake manifold control solenoid valve or valve circuit (too low pressure).
15	The throttle valve is fully open (incorrect information).
16	The throttle valve is completely closed (incorrect information).
17	There is no data exchange between control system units.
18	Valve timing control solenoid (open or short circuit).
19	Open or short circuit in the injector circuit or the exhaust gas composition control system is at the control limit.
20	No speed signal received.
21	Purge valve (open or short circuit).
22	The camshaft position sensor signal is not correct (or a malfunction of its circuit).
23	Variable intake manifold control solenoid valve or its circuit (too low pressure with engine running).
24	Starter engagement failure.
25	Knock sensor or its circuit.
26	Upshift Cancel Valve (open or short circuit in the circuit).
27	Coolant temperature sensor or its circuit.
28	Coolant temperature sensor or its circuit.

Bosch KE5.2 System

Control module

Number of flashes	Malfunction
1	No faults.
2	Fuel pump relay or its circuit.
3	The tachometer signal does not correspond to reality.
4	Lambda probe or its circuit.
5	The exhaust air mixing system control signal is not correct.
6	The kick-down gearshift control signal does not correspond to reality.
9	Oxygen sensor heater malfunction or open circuit.
11	There is no signal to turn on the air conditioning compressor.
12	The air conditioning compressor control output signal is not correct.
13	Excessive slippage of the air conditioning compressor belt.
14	The speedometer signal does not correspond to reality.
15	Short circuit in the fuel pump circuit.

Bosch EZ-L Ignition System

Number of flashes	Malfunction
01	No faults.
02	Knock sensor or its circuit.
03	Coolant temperature sensor or its circuit.
04	Manifold Absolute Pressure Sensor or.
05	Knock sensor or its circuit.
06	Camshaft position sensor or its circuit.
07	Knock sensor or its circuit.
08	AT.
09	AT.
10	Data exchange between KE and EZ blocks.
11	Ignition system control.
12	Speedometer sensor or its circuit.
13	Throttle potentiometer or its circuit.
14	Throttle potentiometer or its circuit.
15	Malfunction of the ignition output stage.
16	Malfunction of the ignition output stage.
17	Vehicle speed sensor or its circuit.
18	Crankshaft position sensor or its circuit.
20	Electronic control module (ECM) or its circuits.
21	Electronic control module (ECM) or its circuits.
26	Data exchange between LH and EZ blocks.
27	Data exchange between LH and EZ blocks.
34	Misfire in cylinder #1.
35	Misfire in cylinder #5.
36	Misfire in cylinder #4.
37	Misfire in cylinder #4.
38	Misfire in cylinder #6.
39	Misfire in cylinder #3.
40	Misfire in cylinder #7.
41	Misfire in cylinder #7.

Bosch Motronic 6.0/6.1 systems

Number of flashes	Malfunction
1	No faults.
2	Coolant temperature sensor or its circuit.
3	Air temperature sensor or its circuit.
4	Manifold Absolute Pressure Sensor or its circuit.
5	Throttle position sensor or switch or its circuit.
6	Throttle potentiometer or its circuit.
7	Throttle potentiometer or its circuit.
8	Idle air control valve or its circuit.
9	Lambda probe or its circuit.
11	Lambda probe or its circuit.
13	Lambda probe or its circuit.
14	Injectors for cylinders 1 and 4.
15	Injectors for cylinders 2 and 3.
21	Primary ignition circuit - cylinders 1 and 4.
21	Primary ignition circuit - cylinders 1 and 4.
22	Primary ignition circuit - cylinders 2 and 3.
24	Engine speed sensor or its circuit.
27	Engine speed sensor or its circuit.
27	Engine speed sensor or its circuit.
28	Speedometer sensor or its circuit.
29	Variable intake manifold control solenoid valve or circuit, preheat relay or circuit.
30	Fuel pump chain.
31	Fuel pump chain.
37	AT.
49	Electronic Control Module (ECM).

HFM system

Number of flashes	Code	Malfunction
1		No faults.
2	002	Coolant temperature sensor or its circuit is shorted.
2	003	Coolant temperature sensor or its circuit - circuit open.
2	004	Coolant temperature sensor or its circuit - signal is incorrect.
2	005	Coolant temperature sensor or its circuit - poor connection.
3	006	Air temperature sensor or its circuit is short circuited.
3	007	Air temperature sensor or its circuit - the circuit is open.
3	008	Air temperature sensor or its circuit - poor contact.
4	009	Air mass sensor or its circuit - abnormally high signal.
4	010	The air mass sensor or its circuit is open.
5	011	Throttle position sensor switch.
5	012	Throttle position switch - closed.
5	013	Throttle position sensor switch - poor contact.
6	014	Throttle potentiometer or its circuit - implausibly high signal.
6	015	Throttle potentiometer or its circuit - implausibly low signal.
6	016	Throttle potentiometer or its circuit - poor connection.
7	017	Throttle potentiometer or its circuit - implausibly high signal.
7	018	Throttle potentiometer or its circuit - implausibly low signal.
7	019	Throttle potentiometer or its circuit - poor connection.
8	020	Idle speed control valve or its circuit - stop at lower control limit.
8	021	Idle speed control valve or its circuit - stop at upper control limit.
9	023	Lambda probe or its circuit - increased voltage.
9	024	Lambda probe or its circuit - the sensor is cold or the circuit is open.
9	025	Lambda probe or its circuit - the signal does not correspond to reality.
11	029	Lambda probe or its circuit - low current in the heater.
11	030	Lambda probe or its circuit - high current in the heater.
11	031	Lambda probe or its circuit - short circuit in the heater.
13	035	Lambda probe or its circuit - lean mixture.
13	036	Lambda probe or its circuit - rich mixture.
14	037	Injector #1 - short circuit.
14	038	Injector #1 - open circuit or short circuit.
15	039	Injector #2 - short circuit to +.
15	040	Injector #2 - open circuit or short circuit to body.
16	041	Injector #3 - short to +.
16	042	Injector #3 - circuit open or short circuit to +.
17	043	Injector #4 - short circuit to +.
17	044	Injector #4 - circuit open or short circuit to +.
20	049-054	Lambda probe or its circuit.
22	055	Ignition coil cylinder #1 - ignition failure or circuit fault.
22	056	Ignition coil cylinder #4 - ignition failure or circuit fault.
22	057	Ignition coil or its circuit - current too low.
23	058	Ignition coil cylinder #2 - ignition failure or circuit fault.
23	059	Ignition coil cylinder #3 - ignition failure or circuit fault.
23	060	Ignition coil or its circuit - current too low.
24	064	Crankshaft position sensor or its circuit.
24	065	Crankshaft position sensor or its circuit.
24	066	Crankshaft position sensor or its circuit.
25	067	Camshaft position sensor or its circuit.
26	068	Electronic Control Module (ECM).
26	069	Electronic Control Module (ECM).
27	070	Tachometer sensor or its circuit.
27	071	Tachometer sensor or its circuit.
28	072	Speedometer sensor or its circuit - signal not recognized.
28	073	Speedometer sensor or its circuit - signal is unrealistically high.
29	074	Variable intake manifold control solenoid valve or its circuit, heater relay.
29	075	Variable intake manifold control solenoid valve or its circuit, heater relay.
30	076	Fuel pump relay or its circuit.
32	079	Knock sensor 1 or its circuit.
32	080	Knock sensor 2 or its circuit.
33	081	Maximum ignition advance has been reached in cylinder 1.
33	082	The difference in ignition timing angles in the cylinders exceeds 6°.
34	083	Knock sensor signal control circuit to ECM.
34	084	Lambda probe or its circuit.
36	087	Carbon adsorber solenoid valve or its circuit.
37	088	AT or its chains.
38	089	Valve timing actuator short circuit to +.
38	090	Valve timing actuator, open circuit or short circuit to housing.
43	101	No starter signal, terminal 50.
	107	Controlling the pulse duration in the ignition coil circuit.
49	110	ECM, incorrect supply voltage.
49	111	ECM low supply voltage.
50	112	ECM.
	113	ECM.
	114	Incorrect ECM coding (after 01.94).
	115	Incorrect ECM coding (after 01.94).
	116	ECM Infrared Signal (after 12.94).
	117	Attempt to start with infrared locking system enabled (after 12.94).
	127	Cruise control/idle speed control drive.
	ECM.	ECM.
	131, 132	ECM.
	133	Electric throttle/crankshaft/idle speed control.
	134	ECM.
	137	ECM.
	138	Electric throttle/crankshaft/idle speed control.
	140-142	ECM.
	144	ECM.

EDS system on diesel engines

Number of flashes	Malfunction
1	No faults recorded
2	Fuel Rail Position Sensor
3	Air flow sensor
4	Atmospheric pressure sensor, EDS control unit
5	Malfunction in the control circuit/vacuum valve of the exhaust gas recirculation transducer
6	EDS control unit supply voltage
7	Starter Pinion Speed Sensor
8	Coolant temperature sensor
9	Intake air temperature sensor
10	Supply voltage
11	Idle speed control valve or EGR vacuum valve
13	Damage to the EDS control unit
14	Air pressure sensor
15	Intake Manifold Air Pressure Control Valve Vacuum Transmitter, Vacuum Transmitter or Intake Manifold Air Pressure Control Circuit

OBD II 2nd Generation On-Board Diagnostic Codes

Power unit

Characteristic	Meaning
P0000	No fault codes in system memory
P0100	Malfunction in the absolute pressure (MAP) sensor circuit. Right bank of cylinders
P0105	Malfunctions in the absolute pressure (MAP) sensor circuit. Right bank of cylinders
P0110	Intake Air Temperature (IAT) Sensor Circuit Malfunction Right Bank of Cylinder
P0115	No or too low signal level of the coolant temperature sensor (ECT). Right bank of cylinders
P0120	Throttle Position Sensor (TPS) Circuit Malfunctions Right Bank of Cylinder
P0130	Malfunction in pre-catalytic l-probe circuit. Right bank of cylinders
P0133	Pre-catalytic heated l-probe voltage too high or response too slow. Right bank of cylinders.
P0135	Malfunction in the pre-catalytic L-probe heating circuit (excessively high voltage). Right bank of cylinders
P0136	Malfunction in the post-catalytic heated l-probe circuit (excessively low voltage). Right bank of cylinders
P0141	Malfunction in the heating circuit of the post-catalytic l-probe. Right bank of cylinders
P0150	Malfunction in pre-catalytic l-probe circuit. Left bank of cylinders
P0153	Slow response of pre-catalytic l-probe. Left bank of cylinders
P0155	Malfunction of pre-catalytic l-probe heater. Left cylinder bank
P0156	The post-catalytic l-probe is faulty. Left bank of cylinders
P0161	Malfunction of the post-catalytic l-probe heater. Left bank of cylinders
P0170	Too lean or too rich of air-fuel mixture. Right bank of cylinders
P0173	Lean or rich injection. Left bank of cylinders
P0201- P0212	Malfunction in the injector circuit of cylinder 1 - 12 respectively
P0300	There are random misfires in various cylinders
P0301 - P0312	There are misfires in cylinders 1 - 12 respectively
P0325	Detonation sensor 1 is faulty. Right bank of cylinders
P0330	Detonation sensor 2 is faulty. Right bank of cylinders
P0335	Malfunction in the crankshaft position sensor circuit. Right bank of cylinders
P0341	Malfunction of the CMP sensor. Right bank of cylinders
P0410	Malfunction in the additional air mixing system
P0422	Excessively reduced catalytic converter efficiency. Right bank of cylinders
P0432	Excessively reduced catalytic converter efficiency. Left bank of cylinders
P0440	EVAP Evaporative Emission System Leaks
P0441	EVAP VSV valve is faulty
P0442	Minor leak detected in EVAP system
P0443 - P0446	EVAP Canister Purge Control Valve Circuit Malfunction
P0450	EVAP Fuel Tank Vapor Pressure Sensor Circuit Malfunction
P0455	Major leak detected in EVAP system
P0462	Short to ground in fuel level sensor circuit
P0500, P0501	Vehicle Speed Sensor VSS Circuit Malfunction
P0507	Unexpected increase in engine speed when the idle speed stabilization system is activated
P0560	Malfunction in the on-board electrical system
P0565	Violation in generating the signal to turn on the tempostat
P0600	AT control unit serial port malfunction
P0604	Control module RAM error
P0605	Control module ROM error
P0700	Malfunction of the transmission control system
P0702	Electrical fault in transmission control system circuit
P0715	Malfunction in the input circuit of the turbine speed sensor circuit
P0720	Malfunction in the speed sensor circuit
P0730	Incorrect selection of AT gear
P0740	Malfunction in the solenoid circuit of the TSS AT rotation converter valve
P0743	Electrical failure in the torque converter clutch circuit
P0748	Electrical fault in pressure control solenoid valve circuit
P0753	Electrical fault in shift solenoid valve A circuit
P0758	Electrical fault in shift solenoid circuit B
P0763	Electrical fault in shift solenoid valve C circuit
P0809	Electrical fault in shift solenoid valve C circuit
P1146	MAF Circuit Malfunction Left Bank of Cylinder
P1147	ECT Coolant Temperature Sensor Circuit Malfunction Left Bank of Cylinder
P1148	ECT Coolant Temperature Sensor Circuit Malfunction Left Bank of Cylinder
P1149	Malfunction in the absolute pressure sensor circuit in the MAP line. Left bank of cylinders
P1162	Malfunction in the absolute pressure sensor circuit in the MAP line. Left bank of cylinders
P1163	Malfunction in the absolute pressure sensor circuit in the MAP line. Left bank of cylinders
P1183	Fuel Shutdown Alarm
P1186	Fuel Shutdown Alarm
P1300	Crankshaft Position Sensor Circuit Malfunction CKP Left Bank
P1384	Malfunction in the knock sensor circuit KS 1. Left bank of cylinders
P1385	Malfunction in the knock sensor circuit KS 2. Left bank of cylinders
P1386	Knock control from ECM
P1397	Malfunction of the CMP camshaft position sensor. Left bank of cylinders
P1420	Secondary air mixing system pump switch valve AIR
P1443	Malfunction in the EVAP fuel vapor recovery system circuits
P1453	AIR Secondary Air Mixing System Relay Module
P1463	Failure in the left section of the secondary air mixing system tract
P1490	EVAP Canister Purge Control Valve Circuit Malfunction Left Bank
P1519	Right camshaft phase shift adjustment solenoid
P1522	Left camshaft phase shift adjustment solenoid
P1525	Right camshaft phase shift adjustment solenoid
P1533	Left camshaft phase shift adjustment solenoid
P1542	Pedal sensor
P1570	Blocking launch attempt (rCL Remote Control Models); CAN signal compatibility failure from DAS driver recognition control module to ECM or EECM & DAS
P1580	Electronic accelerator pedal/cruise control/idle speed control (right) EA/CC/ISC
P1581	Electronic accelerator pedal/cruise control/idle speed control (left) EA/CC/ISC
P1584	Brake Light Switch Sensor
P1587	Engine control unit supply voltage (left)
P1588	Distributed signal (CAN) from RCL control unit to left ECM
P1589	Left ECM Knock Sensor Circuit
P1605	Body acceleration sensor (crash)
P1632	Engine Control Module ECM
P1641	Engine Control Module ECM
P1747	Switched bus (CAN) signal from the ETC unit

Chassis (aBS/ASR/ETS/ESP systems)

C1000	ESP/SPS control unit (N47-5)
C1010	Low supply voltage, circuit 87
C1011	Open/short circuit in the power supply circuit of the solenoid valve of the ASR/ETS/ESP hydraulic unit
C1020	CAN switched data bus communication fault. Check control unit coding
C1022	Malfunction of the switched data bus communication with the engine control unit (ME-SFI, N30/10) or right engine control unit (ME-SFI, N3/12)
C1023	Distributed data bus communication fault with left engine control unit (ME-SFI, N3/11)
C1024	Distributed data bus communication fault with transmission control unit (N15/3)
C1100	Break, poor contact, damage to the rotor teeth of the vehicle speed sensor on the left front wheel (L6/1), different wheel size, incorrect final drive ratio
C1101	Break, poor contact, damage to the rotor teeth of the vehicle speed sensor on the right front wheel (L6/2), different wheel size, incorrect final drive ratio
C1102	Broken, poor contact, damaged teeth of the rotor of the vehicle speed sensor on the left rear wheel (L6/3), different wheel size, incorrect final drive ratio
C1103	Break, poor contact, damage to the rotor teeth of the vehicle speed sensor on the right rear wheel (L6/4), different wheel size, incorrect final drive ratio
C1120	Open circuit, short circuit in the reference or working signal wire of the ESP stability control sensor (N64)
C1140	Open circuit, short circuit, initialization of the steering angle sensor (N49)
C1141	ESP Brake Pressure Sensor (B34)
C1142	Open circuit, short circuit in the ABS lateral acceleration sensor circuit (B24/2)
C1200	Open circuit, short circuit, malfunction of 4-pin brake pedal position switch (S9/1)
C1300	Open circuit, short circuit in the circuit of the holding solenoid valve of the left front wheel (A7/3y6)
C1301	Open circuit, short circuit of the left front wheel release solenoid valve (A7/3y7)
C1302	Open circuit, short circuit in the circuit of the retaining solenoid valve of the right front wheel (A7/3y8)
C1303	Open circuit, short circuit of the release solenoid valve of the right front wheel (A7/3y9)
C1304	Open circuit, short circuit in the circuit of the holding solenoid valve of the left rear wheel (A7/3y10)
C1305	Open circuit, short circuit in the circuit of the release solenoid valve of the left rear wheel (A7/3y11)
C1306	Open circuit, short circuit in the circuit of the retaining solenoid valve of the right rear wheel (A7/3y12)
C1307	Open circuit, short circuit in the circuit of the release solenoid valve of the right rear wheel (A7/3y13)
C1308	Open circuit, short circuit in the circuit of the release solenoid valve of the right rear wheel (A7/3y13)
C1309	Open circuit, short circuit in the circuit of the release solenoid valve of the right rear wheel (A7/3y13)
C1310	Open circuit, short circuit of the front wheel shift valve circuit (A7/3y18)
C1311	Open circuit, short circuit of the rear wheel shift valve circuit (A7/3y19)
C1312	Master Cylinder Shift Valve (Y61)
C1313	Relay solenoid valve hydraulic unit (A7/3k1). Replace control unit (N47/5)
C1400	Open circuit, short circuit in ASR/ESP pump circuit (M15)
C1401	Open, short or failure to turn off the high pressure pump/valve body return circuit (A7/3m1)
C1500	Vehicle Speed Sensor VSS (L6/1, L6/2, L6/3, L6/4)
C1501	SPS pressure sensor (Y10)
C1503	Piston pressure transfer unit. Check condition of rear brake pads
C1504	System disabled. Steering angle sensor (N49) not initialized, ESP stability sensor low voltage (N64)

Body (automatic air conditioning system)

Display		OBD II Tester
026	B1026	Transmission via switched CAN data bus
226	B1226	Interior temperature sensor B10/4
227	B1227	Outside temperature indicator sensor B10/5, models up to 1996
228	B1228	Left heater temperature sensor B10/2
229	B1229	Right heater temperature sensor B10/3
230	B1230	Evaporator temperature sensor B10/6
231	B1231	Coolant temperature sensor B11/4 (DFI, IFI), or right coolant sensor (up to 1996)
232	B1232	Refrigerant pressure sensor B12
233	B1233	Coolant temperature sensor B12/1
234	B1234	Solar radiation sensor B32
235	B1235	Emission sensor B31
241	B1241	Add refrigerant
416	B1416	Coolant circulation pump A31m1
417	B1417	Water valve left Y21y1
418	B1418	Water valve right Y21y2
419	B1419	Electromagnetic clutch A9k1
420	B1420	Increase in idle speed
421	B1421	Pulse module N65
422	B1422	Serial interface K1 to instrument cluster A1
423	B1423	Shift valve block Y11
424	B1424	A32m² adsorber drive is open
425	B1425	A32m² adsorber drive closed
432	B1432	Maximum heating
459	B1459	Serial interface K2 to instrument cluster A1
460	B1460	LED - central air deflector, "Heating" position
461	B1461	LED - Central air deflector, "Cooling" position
462	B1462	Fully open position of the WOT throttle (diesel models)